Mercurial > hg > ede

--- a/assembler/assembler.py	Fri Feb 28 17:21:11 2014 +0000
+++ b/assembler/assembler.py	Thu Mar 06 20:24:49 2014 +0000
@@ -69,7 +69,10 @@
                 # labels can be used in equates but they have
                 # to be assigned before they are used as well
                 elif s in labels:
-                    statement[i] = prefix + str(labels[s]) + suffix
+                    if statement[0] in rinst:
+                        statement[i] = prefix + str(labels[s] - pc) + suffix
+                    else:
+                        statement[i] = prefix + str(labels[s]) + suffix
                 i = i + 1

             # deal with org
@@ -81,10 +84,9 @@
             elif statement[0][-1] == ':':
                 labels[statement[0][:-1]] = pc;
                 del statement[0]
-
             # store equates
             # these are case sensative
-            if (len(statement) >= 3) and (statement[1].lower() == 'equ'):
+            elif (len(statement) >= 3) and (statement[1].lower() == 'equ'):
                 equates[statement[0]] = ' '.join(statement[2:])
                 continue
Binary file assembler/language.pyc has changed
Binary file doc/elb816_opcodes.ods has changed
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/doc/general/ede.lyx	Thu Mar 06 20:24:49 2014 +0000
@@ -0,0 +1,1391 @@
+#LyX 2.0 created this file. For more info see http://www.lyx.org/
+\lyxformat 413
+\begin_document
+\begin_header
+\textclass article
+\use_default_options true
+\maintain_unincluded_children false
+\language english
+\language_package default
+\inputencoding auto
+\fontencoding global
+\font_roman lmodern
+\font_sans lmss
+\font_typewriter cmtt
+\font_default_family default
+\use_non_tex_fonts false
+\font_sc false
+\font_osf false
+\font_sf_scale 100
+\font_tt_scale 100
+
+\graphics default
+\default_output_format default
+\output_sync 0
+\bibtex_command default
+\index_command default
+\paperfontsize default
+\spacing single
+\use_hyperref false
+\papersize default
+\use_geometry false
+\use_amsmath 1
+\use_esint 1
+\use_mhchem 1
+\use_mathdots 1
+\cite_engine basic
+\use_bibtopic false
+\use_indices false
+\paperorientation portrait
+\suppress_date false
+\use_refstyle 1
+\index Index
+\shortcut idx
+\color #008000
+\end_index
+\secnumdepth 3
+\tocdepth 3
+\paragraph_separation indent
+\paragraph_indentation default
+\quotes_language english
+\papercolumns 1
+\papersides 1
+\paperpagestyle default
+\tracking_changes false
+\output_changes false
+\html_math_output 0
+\html_css_as_file 0
+\html_be_strict false
+\end_header
+
+\begin_body
+
+\begin_layout Title
+EDE: ELB816 Development Environment
+\end_layout
+
+\begin_layout Author
+James Bowden (110104485)
+\end_layout
+
+\begin_layout Abstract
+The ELB816 Development Environment consists of an assembler, emulator and
+ debugger for the ELB816 microprocessor system.
+ This report details the design and usage of each of its elements.
+\end_layout
+
+\begin_layout Standard
+\begin_inset Newpage newpage
+\end_inset
+
+
+\end_layout
+
+\begin_layout Part
+Assembler
+\end_layout
+
+\begin_layout Standard
+The assembler is written in pure Python 2 using only the standard library.
+ It assembles the assembly the language described in the ELB816 specification
+ with a few minor differences.
+ These differences are:
+\end_layout
+
+\begin_layout Itemize
+In-line arithmetic must be wrapped in curved brackets eg.
+ start with '(' and end with ')'.
+ This is a limitation of the design of the program and to change it would
+ require a large amount of code to be re-written.
+\end_layout
+
+\begin_layout Itemize
+The only directives that have been implemented are
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+ORG
+\end_layout
+
+\end_inset
+
+,
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+EQU
+\end_layout
+
+\end_inset
+
+,
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+DB
+\end_layout
+
+\end_inset
+
+ and
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+DS
+\end_layout
+
+\end_inset
+
+.
+ The other directives listed in the specification have not been implemented,
+ but there omission is only due to time constraints and they could easily
+ be implemented in a later version.
+\end_layout
+
+\begin_layout Itemize
+Macros have not been implemented also due to time constraints.
+\end_layout
+
+\begin_layout Standard
+The assembler consists of two files:
+\end_layout
+
+\begin_layout Itemize
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+language.py
+\end_layout
+
+\end_inset
+
+ which contains the language definition in an index and some functions to
+ help encode instructions.
+\end_layout
+
+\begin_layout Itemize
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+assembler.py
+\end_layout
+
+\end_inset
+
+ which contains the first and second pass functions and handles opening
+ source files and writing binary files.
+\end_layout
+
+\begin_layout Standard
+The following sections detail the design and behavior of the assembler.
+ However it must be noted that these are abstract and high level descriptions
+ that do not fully explain minor routines, but give an overview of the entire
+ process.
+ The full source code is attached in the Appendix and should be referenced
+ for a deeper understanding of the program's operation.
+ The final section is a short programmers manual demonstrating the assembler's
+ features.
+\end_layout
+
+\begin_layout Standard
+\begin_inset Newpage newpage
+\end_inset
+
+
+\end_layout
+
+\begin_layout Section
+Data Structures
+\end_layout
+
+\begin_layout Itemize
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+reserved arguments
+\end_layout
+
+\end_inset
+
+
+\end_layout
+
+\begin_layout Standard
+This structure contains a list of string representations of the reserved
+ word arguments for the instruction set.
+ These all equate to registers or register pointers.
+ The full list is as follows:
+\end_layout
+
+\begin_layout Standard
+\begin_inset listings
+lstparams "basicstyle={\ttfamily},captionpos=b,frame=tb,framexbottommargin=1em,framextopmargin=1em,keywordstyle={\color{blue}},tabsize=4"
+inline false
+status open
+
+\begin_layout Plain Layout
+
+a, c, bs, ie, flags,
+\end_layout
+
+\begin_layout Plain Layout
+
+r0, r1, r2, r3,
+\end_layout
+
+\begin_layout Plain Layout
+
+dptr, dpl, dph,
+\end_layout
+
+\begin_layout Plain Layout
+
+sp, sph, spl,
+\end_layout
+
+\begin_layout Plain Layout
+
+@a+pc, @a+dptr, @dptr
+\end_layout
+
+\end_inset
+
+
+\end_layout
+
+\begin_layout Itemize
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+relative instructions
+\end_layout
+
+\end_inset
+
+
+\end_layout
+
+\begin_layout Standard
+This structure contains a list of string representations of the mnemonics
+ of instructions that use relative addressing.
+ The full list is as follows:
+\end_layout
+
+\begin_layout Standard
+\begin_inset listings
+lstparams "basicstyle={\ttfamily},captionpos=b,frame=tb,framexbottommargin=1em,framextopmargin=1em,keywordstyle={\color{blue}},tabsize=4"
+inline false
+status open
+
+\begin_layout Plain Layout
+
+djnz, cjne, sjmp, jz,
+\end_layout
+
+\begin_layout Plain Layout
+
+jnz, jc, jnc, jpo,
+\end_layout
+
+\begin_layout Plain Layout
+
+jpe, js, jns
+\end_layout
+
+\end_inset
+
+
+\end_layout
+
+\begin_layout Itemize
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+instruction index
+\end_layout
+
+\end_inset
+
+
+\end_layout
+
+\begin_layout Standard
+This structure contains an index of all possible instructions in the instruction
+ set, along with the the corresponding opcode and instruction width.
+ This is implemented using a combination of Python's dictionary, tuple and
+ list objects.
+ Its structure is demonstrated below:
+\end_layout
+
+\begin_layout Standard
+\begin_inset listings
+lstparams "basicstyle={\ttfamily},captionpos=b,frame=tb,framexbottommargin=1em,framextopmargin=1em,keywordstyle={\color{blue}},tabsize=4"
+inline false
+status open
+
+\begin_layout Plain Layout
+
+mneumonic: (arg type, arg type, ...): [opcode, width]
+\end_layout
+
+\end_inset
+
+
+\end_layout
+
+\begin_layout Standard
+Each mnemonic has an entry in the parent index which returns another index
+ of possible argument formats for that mnemonic with their corresponding
+ opcode and length.
+ Argument types can be either be one of the reserved arguments or one of
+ the following values:
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+address
+\end_layout
+
+\end_inset
+
+,
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+pointer
+\end_layout
+
+\end_inset
+
+,
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+data
+\end_layout
+
+\end_inset
+
+ or
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+label
+\end_layout
+
+\end_inset
+
+ .
+ Width is represented in number of bytes, ie.
+
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+width = 3
+\end_layout
+
+\end_inset
+
+ means 1 byte of opcode and 2 bytes of arguments.
+\end_layout
+
+\begin_layout Itemize
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+label index
+\end_layout
+
+\end_inset
+
+
+\end_layout
+
+\begin_layout Standard
+This structure is used to store an index of label definitions.
+\end_layout
+
+\begin_layout Itemize
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+equate index
+\end_layout
+
+\end_inset
+
+
+\end_layout
+
+\begin_layout Standard
+This structure is used to store an index of equated strings.
+\end_layout
+
+\begin_layout Standard
+\begin_inset Newpage newpage
+\end_inset
+
+
+\end_layout
+
+\begin_layout Section
+Functions
+\end_layout
+
+\begin_layout Itemize
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+first_pass(source file)
+\end_layout
+
+\end_inset
+
+
+\end_layout
+
+\begin_layout Standard
+This function pre-processes a source file and stores it in a format containing
+ the necessary data for the
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+second_pass()
+\end_layout
+
+\end_inset
+
+ function to assemble it.
+ It processes labels and
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+EQU
+\end_layout
+
+\end_inset
+
+ directives by storing strings and their corresponding values in indexes
+ and replacing any subsequent appearances of the string with the value.
+ It prepares
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+ORG
+\end_layout
+
+\end_inset
+
+ and
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+DB
+\end_layout
+
+\end_inset
+
+ statements for the
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+second_pass()
+\end_layout
+
+\end_inset
+
+.
+ It uses the
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+tokenize()
+\end_layout
+
+\end_inset
+
+ function to determine the argument symbols and operand bit string.
+ Finally it uses the
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+instruction index
+\end_layout
+
+\end_inset
+
+ to determine the instruction width.
+\end_layout
+
+\begin_layout Itemize
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+second_pass(asm, label index)
+\end_layout
+
+\end_inset
+
+
+\end_layout
+
+\begin_layout Standard
+This function takes the pre-processed assembly code and
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+label index
+\end_layout
+
+\end_inset
+
+ output by
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+first_pass()
+\end_layout
+
+\end_inset
+
+ as input.
+ First it checks for
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+ORG
+\end_layout
+
+\end_inset
+
+ and
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+DB
+\end_layout
+
+\end_inset
+
+ statements and handles them if necessary.
+ Then it replaces any labels that were used before they were defined and
+ therefore not replaced on by
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+first_pass()
+\end_layout
+
+\end_inset
+
+ .
+ It uses the
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+instruction index
+\end_layout
+
+\end_inset
+
+ to determine the opcode and the width of the instruction, then it writes
+ the opcode and operand to the file.
+ If the combined width of the opcode and operand is greater than the instruction
+ width the function raises an error.
+
+\end_layout
+
+\begin_layout Itemize
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+tokenize(mnemonic, arguments)
+\end_layout
+
+\end_inset
+
+
+\end_layout
+
+\begin_layout Standard
+This function processes an instruction in order to produce a hashable symbol
+ that represents the format of its arguments.
+ This symbol is used to look up opcodes in the
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+instruction index
+\end_layout
+
+\end_inset
+
+.
+ It also detects string representations of numbers in the arguments and
+ stores a C type struct representation of the operands to be returned along
+ with the symbol.
+ It does this with the help of the
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+stoi()
+\end_layout
+
+\end_inset
+
+ function and Pythons
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+struct
+\end_layout
+
+\end_inset
+
+ module .
+\end_layout
+
+\begin_layout Itemize
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+stoi(string)
+\end_layout
+
+\end_inset
+
+
+\end_layout
+
+\begin_layout Standard
+This function is a general purpose function that is actually used throughout
+ the code, although mainly in the
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+tokenize()
+\end_layout
+
+\end_inset
+
+ function.
+ It takes a string as an input and tries to convert it to an integer using
+ Pythons integer representation syntax.
+ It can recognize decimal, octal, hexadecimal and binary numbers which are
+ denoted with different prefixes.
+ If it receives a string it can not represent as an integer it returns the
+ string 'NaN', (Not a Number)
+\end_layout
+
+\begin_layout Standard
+\begin_inset ERT
+status open
+
+\begin_layout Plain Layout
+
+
+\backslash
+bigskip
+\end_layout
+
+\end_inset
+
+
+\end_layout
+
+\begin_layout Standard
+Below is an abstract representation of each functions logical process.
+ The
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+first_pass()
+\end_layout
+
+\end_inset
+
+ and
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+second_pass()
+\end_layout
+
+\end_inset
+
+ are represented in pseudo-code, however
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+stoi()
+\end_layout
+
+\end_inset
+
+ and
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+tokenize()
+\end_layout
+
+\end_inset
+
+ are more easily understood when represented as flowcharts.
+
+\end_layout
+
+\begin_layout Standard
+\begin_inset Newpage newpage
+\end_inset
+
+
+\end_layout
+
+\begin_layout Subsection
+first_pass()
+\end_layout
+
+\begin_layout Standard
+\begin_inset listings
+lstparams "basicstyle={\small\ttfamily},captionpos=b,frame=tb,framexbottommargin=3em,framextopmargin=3em,keywordstyle={\color{blue}},language=Python,showstringspaces=false,tabsize=4"
+inline false
+status open
+
+\begin_layout Plain Layout
+
+first_pass(source file):
+\end_layout
+
+\begin_layout Plain Layout
+
+\end_layout
+
+\begin_layout Plain Layout
+
+	address = 0
+\end_layout
+
+\begin_layout Plain Layout
+
+\end_layout
+
+\begin_layout Plain Layout
+
+	for statement in source file:
+\end_layout
+
+\begin_layout Plain Layout
+
+\end_layout
+
+\begin_layout Plain Layout
+
+		remove comments
+\end_layout
+
+\begin_layout Plain Layout
+
+
+\end_layout
+
+\begin_layout Plain Layout
+
+		for word in statement:
+\end_layout
+
+\begin_layout Plain Layout
+
+
+\end_layout
+
+\begin_layout Plain Layout
+
+			if word is in equate index:
+\end_layout
+
+\begin_layout Plain Layout
+
+				replace word with equated value
+\end_layout
+
+\begin_layout Plain Layout
+
+			else if word is in label index:
+\end_layout
+
+\begin_layout Plain Layout
+
+				replace word with address at label
+\end_layout
+
+\begin_layout Plain Layout
+
+
+\end_layout
+
+\begin_layout Plain Layout
+
+			if first word == 'org'
+\end_layout
+
+\begin_layout Plain Layout
+
+				address = second word
+\end_layout
+
+\begin_layout Plain Layout
+
+			else if last character of first word == ':':
+\end_layout
+
+\begin_layout Plain Layout
+
+				remove ':'
+\end_layout
+
+\begin_layout Plain Layout
+
+				add word = address to label index
+\end_layout
+
+\begin_layout Plain Layout
+
+				next statement
+\end_layout
+
+\begin_layout Plain Layout
+
+			else if second word == 'equ'
+\end_layout
+
+\begin_layout Plain Layout
+
+				add first word = third word to equate index
+\end_layout
+
+\begin_layout Plain Layout
+
+				next statement
+\end_layout
+
+\begin_layout Plain Layout
+
+
+\end_layout
+
+\begin_layout Plain Layout
+
+		mnemonic = first word
+\end_layout
+
+\begin_layout Plain Layout
+
+		arguments = [second word ...
+ last word]
+\end_layout
+
+\begin_layout Plain Layout
+
+
+\end_layout
+
+\begin_layout Plain Layout
+
+		symbol, constant = tokenize(arguments)
+\end_layout
+
+\begin_layout Plain Layout
+
+		if mnemonic == 'db':
+\end_layout
+
+\begin_layout Plain Layout
+
+			address = address + width of constant
+\end_layout
+
+\begin_layout Plain Layout
+
+			next statement
+\end_layout
+
+\begin_layout Plain Layout
+
+
+\end_layout
+
+\begin_layout Plain Layout
+
+        width = instruction index[mnemonic][symbol][width]
+\end_layout
+
+\begin_layout Plain Layout
+
+		address = address + width
+\end_layout
+
+\begin_layout Plain Layout
+
+
+\end_layout
+
+\begin_layout Plain Layout
+
+		append [mnemonic, argument, symbol, constant] to asm
+\end_layout
+
+\begin_layout Plain Layout
+
+\end_layout
+
+\begin_layout Plain Layout
+
+	return asm, label index
+\end_layout
+
+\end_inset
+
+
+\begin_inset Newpage newpage
+\end_inset
+
+
+\end_layout
+
+\begin_layout Subsection
+second_pass()
+\end_layout
+
+\begin_layout Standard
+\begin_inset listings
+lstparams "basicstyle={\small\ttfamily},breaklines=true,captionpos=b,frame=tb,framexbottommargin=3em,framextopmargin=3em,keywordstyle={\color{blue}},language=Python,tabsize=4"
+inline false
+status open
+
+\begin_layout Plain Layout
+
+second_pass(file, asm, label index):
+\end_layout
+
+\begin_layout Plain Layout
+
+\end_layout
+
+\begin_layout Plain Layout
+
+	address = 0
+\end_layout
+
+\begin_layout Plain Layout
+
+\end_layout
+
+\begin_layout Plain Layout
+
+	for line in asm:
+\end_layout
+
+\begin_layout Plain Layout
+
+\end_layout
+
+\begin_layout Plain Layout
+
+		file offset = address
+\end_layout
+
+\begin_layout Plain Layout
+
+
+\end_layout
+
+\begin_layout Plain Layout
+
+		mnemonic, arguments, symbol, constant = line
+\end_layout
+
+\begin_layout Plain Layout
+
+
+\end_layout
+
+\begin_layout Plain Layout
+
+		if mnemonic == 'org':
+\end_layout
+
+\begin_layout Plain Layout
+
+			address = first argument
+\end_layout
+
+\begin_layout Plain Layout
+
+			next line
+\end_layout
+
+\begin_layout Plain Layout
+
+		else if mnemonic == 'db':
+\end_layout
+
+\begin_layout Plain Layout
+
+			write constant to file
+\end_layout
+
+\begin_layout Plain Layout
+
+			address = address + width of constant
+\end_layout
+
+\begin_layout Plain Layout
+
+			next line
+\end_layout
+
+\begin_layout Plain Layout
+
+
+\end_layout
+
+\begin_layout Plain Layout
+
+		for argument in arguments:
+\end_layout
+
+\begin_layout Plain Layout
+
+			if argument is a label:
+\end_layout
+
+\begin_layout Plain Layout
+
+				replace argument with address at label
+\end_layout
+
+\begin_layout Plain Layout
+
+				symbol, data = tokenize(argument)
+\end_layout
+
+\begin_layout Plain Layout
+
+				append data to constant
+\end_layout
+
+\begin_layout Plain Layout
+
+
+\end_layout
+
+\begin_layout Plain Layout
+
+		op, width = instruction index[mnemonic][symbol]
+\end_layout
+
+\begin_layout Plain Layout
+
+
+\end_layout
+
+\begin_layout Plain Layout
+
+		write op to file
+\end_layout
+
+\begin_layout Plain Layout
+
+\end_layout
+
+\begin_layout Plain Layout
+
+		if width of constant - width + 1 > 0:
+\end_layout
+
+\begin_layout Plain Layout
+
+			raise error
+\end_layout
+
+\begin_layout Plain Layout
+
+		else if:
+\end_layout
+
+\begin_layout Plain Layout
+
+			write constant to file
+\end_layout
+
+\begin_layout Plain Layout
+
+			address = address.+ width
+\end_layout
+
+\begin_layout Plain Layout
+
+
+\end_layout
+
+\begin_layout Plain Layout
+
+	return file
+\end_layout
+
+\end_inset
+
+
+\begin_inset Newpage newpage
+\end_inset
+
+
+\end_layout
+
+\begin_layout Subsection
+tokenize()
+\end_layout
+
+\begin_layout Standard
+\begin_inset ERT
+status open
+
+\begin_layout Plain Layout
+
+
+\backslash
+bigskip
+\end_layout
+
+\end_inset
+
+
+\end_layout
+
+\begin_layout Standard
+\begin_inset Graphics
+	filename /home/jmz/qm/ede/doc/images/assembler/tokenize.svg
+	scale 55
+
+\end_inset
+
+
+\end_layout
+
+\begin_layout Standard
+\begin_inset Newpage newpage
+\end_inset
+
+
+\end_layout
+
+\begin_layout Subsection
+stoi()
+\end_layout
+
+\begin_layout Standard
+\begin_inset ERT
+status open
+
+\begin_layout Plain Layout
+
+
+\backslash
+bigskip
+\end_layout
+
+\end_inset
+
+
+\end_layout
+
+\begin_layout Description
+\begin_inset Graphics
+	filename /home/jmz/qm/ede/doc/images/assembler/stoi.svg
+	scale 70
+
+\end_inset
+
+
+\end_layout
+
+\begin_layout Standard
+\begin_inset Newpage newpage
+\end_inset
+
+
+\end_layout
+
+\begin_layout Section
+Manual
+\end_layout
+
+\begin_layout Standard
+
+\end_layout
+
+\end_body
+\end_document
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/doc/general/ede.lyx~	Thu Mar 06 20:24:49 2014 +0000
@@ -0,0 +1,1432 @@
+#LyX 2.0 created this file. For more info see http://www.lyx.org/
+\lyxformat 413
+\begin_document
+\begin_header
+\textclass article
+\use_default_options true
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+\language english
+\language_package default
+\inputencoding auto
+\fontencoding global
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+\use_refstyle 1
+\index Index
+\shortcut idx
+\color #008000
+\end_index
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+\quotes_language english
+\papercolumns 1
+\papersides 1
+\paperpagestyle default
+\tracking_changes false
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+\html_math_output 0
+\html_css_as_file 0
+\html_be_strict false
+\end_header
+
+\begin_body
+
+\begin_layout Title
+EDE: ELB816 Development Environment
+\end_layout
+
+\begin_layout Author
+James Bowden (110104485)
+\end_layout
+
+\begin_layout Abstract
+The ELB816 Development Environment consists of an assembler, emulator and
+ debugger for the ELB816 microprocessor system.
+ This report details the design and usage of each of these elements.
+\end_layout
+
+\begin_layout Standard
+\begin_inset Newpage newpage
+\end_inset
+
+
+\end_layout
+
+\begin_layout Standard
+\begin_inset Index idx
+status open
+
+\begin_layout Plain Layout
+Assembler
+\end_layout
+
+\end_inset
+
+
+\end_layout
+
+\begin_layout Standard
+\begin_inset Index idx
+status open
+
+\begin_layout Plain Layout
+Emulator
+\end_layout
+
+\end_inset
+
+
+\end_layout
+
+\begin_layout Standard
+\begin_inset Index idx
+status open
+
+\begin_layout Plain Layout
+Debugger
+\end_layout
+
+\end_inset
+
+
+\end_layout
+
+\begin_layout Standard
+\begin_inset Newpage newpage
+\end_inset
+
+
+\end_layout
+
+\begin_layout Part
+Assembler
+\end_layout
+
+\begin_layout Standard
+The assembler is written in pure Python 2 using only the standard library.
+ It assembles the assembly the language described in the ELB816 specification
+ with a few minor differences.
+ These differences are:
+\end_layout
+
+\begin_layout Itemize
+In-line arithmetic must be wrapped in curved brackets eg.
+ start with '(' and end with ')'.
+ This is a limitation of the design of the program and to change it would
+ require a large amount of code to be re-written.
+\end_layout
+
+\begin_layout Itemize
+The only directives that have been implemented are
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+ORG
+\end_layout
+
+\end_inset
+
+,
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+EQU
+\end_layout
+
+\end_inset
+
+,
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+DB
+\end_layout
+
+\end_inset
+
+ and
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+DS
+\end_layout
+
+\end_inset
+
+.
+ The other directives listed in the specification have not been implemented,
+ but there omission is only due to time constraints and they could easily
+ be implemented in a later version.
+\end_layout
+
+\begin_layout Itemize
+Macros have not been implemented also due to time constraints.
+\end_layout
+
+\begin_layout Standard
+The assembler consists of two files:
+\end_layout
+
+\begin_layout Itemize
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+language.py
+\end_layout
+
+\end_inset
+
+ which contains the language definition in an index and some functions to
+ help encode instructions.
+\end_layout
+
+\begin_layout Itemize
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+assembler.py
+\end_layout
+
+\end_inset
+
+ which contains the first and second pass functions and handles opening
+ source files and writing binary files.
+\end_layout
+
+\begin_layout Standard
+The following sections detail the design and behavior of the assembler.
+ However it must be noted that these are abstract and high level descriptions
+ that do not fully explain minor routines, but give an overview of the entire
+ process.
+ The full source code is attached in the Appendix and should be referenced
+ for a deeper understanding of the program's operation.
+ The final section details the testing procedure.
+\end_layout
+
+\begin_layout Standard
+\begin_inset Newpage newpage
+\end_inset
+
+
+\end_layout
+
+\begin_layout Section
+Data Structures
+\end_layout
+
+\begin_layout Itemize
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+reserved arguments
+\end_layout
+
+\end_inset
+
+
+\end_layout
+
+\begin_layout Standard
+This structure contains a list of string representations of the reserved
+ word arguments for the instruction set.
+ These all equate to registers or register pointers.
+ The full list is as follows:
+\end_layout
+
+\begin_layout Standard
+\begin_inset listings
+lstparams "basicstyle={\ttfamily},captionpos=b,frame=tb,framexbottommargin=1em,framextopmargin=1em,keywordstyle={\color{blue}},tabsize=4"
+inline false
+status open
+
+\begin_layout Plain Layout
+
+a, c, bs, ie, flags,
+\end_layout
+
+\begin_layout Plain Layout
+
+r0, r1, r2, r3,
+\end_layout
+
+\begin_layout Plain Layout
+
+dptr, dpl, dph,
+\end_layout
+
+\begin_layout Plain Layout
+
+sp, sph, spl,
+\end_layout
+
+\begin_layout Plain Layout
+
+@a+pc, @a+dptr, @dptr
+\end_layout
+
+\end_inset
+
+
+\end_layout
+
+\begin_layout Itemize
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+relative instructions
+\end_layout
+
+\end_inset
+
+
+\end_layout
+
+\begin_layout Standard
+This structure contains a list of string representations of the mnemonics
+ of instructions that use relative addressing.
+ The full list is as follows:
+\end_layout
+
+\begin_layout Standard
+\begin_inset listings
+lstparams "basicstyle={\ttfamily},captionpos=b,frame=tb,framexbottommargin=1em,framextopmargin=1em,keywordstyle={\color{blue}},tabsize=4"
+inline false
+status open
+
+\begin_layout Plain Layout
+
+djnz, cjne, sjmp, jz,
+\end_layout
+
+\begin_layout Plain Layout
+
+jnz, jc, jnc, jpo,
+\end_layout
+
+\begin_layout Plain Layout
+
+jpe, js, jns
+\end_layout
+
+\end_inset
+
+
+\end_layout
+
+\begin_layout Itemize
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+instruction index
+\end_layout
+
+\end_inset
+
+
+\end_layout
+
+\begin_layout Standard
+This structure contains an index of all possible instructions in the instruction
+ set, along with the the corresponding opcode and instruction width.
+ This is implemented using a combination of Python's dictionary, tuple and
+ list objects.
+ Its structure is demonstrated below:
+\end_layout
+
+\begin_layout Standard
+\begin_inset listings
+lstparams "basicstyle={\ttfamily},captionpos=b,frame=tb,framexbottommargin=1em,framextopmargin=1em,keywordstyle={\color{blue}},tabsize=4"
+inline false
+status open
+
+\begin_layout Plain Layout
+
+mneumonic: (arg type, arg type, ...): [opcode, width]
+\end_layout
+
+\end_inset
+
+
+\end_layout
+
+\begin_layout Standard
+Each mnemonic has an entry in the parent index which returns another index
+ of possible argument formats for that mnemonic with their corresponding
+ opcode and length.
+ Argument types can be either be one of the reserved arguments or one of
+ the following values:
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+address
+\end_layout
+
+\end_inset
+
+,
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+pointer
+\end_layout
+
+\end_inset
+
+,
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+data
+\end_layout
+
+\end_inset
+
+ or
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+label
+\end_layout
+
+\end_inset
+
+ .
+ Width is represented in number of bytes, ie.
+
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+width = 3
+\end_layout
+
+\end_inset
+
+ means 1 byte of opcode and 2 bytes of arguments.
+\end_layout
+
+\begin_layout Itemize
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+label index
+\end_layout
+
+\end_inset
+
+
+\end_layout
+
+\begin_layout Standard
+This structure is used to store an index of label definitions.
+\end_layout
+
+\begin_layout Itemize
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+equate index
+\end_layout
+
+\end_inset
+
+
+\end_layout
+
+\begin_layout Standard
+This structure is used to store an index of equated strings.
+\end_layout
+
+\begin_layout Standard
+\begin_inset Newpage newpage
+\end_inset
+
+
+\end_layout
+
+\begin_layout Section
+Functions
+\end_layout
+
+\begin_layout Itemize
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+first_pass(source file)
+\end_layout
+
+\end_inset
+
+
+\end_layout
+
+\begin_layout Standard
+This function pre-processes a source file and stores it in a format containing
+ the necessary data for the
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+second_pass()
+\end_layout
+
+\end_inset
+
+ function to assemble it.
+ It processes labels and
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+EQU
+\end_layout
+
+\end_inset
+
+ directives by storing strings and their corresponding values in indexes
+ and replacing any subsequent appearances of the string with the value.
+ It prepares
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+ORG
+\end_layout
+
+\end_inset
+
+ and
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+DB
+\end_layout
+
+\end_inset
+
+ statements for the
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+second_pass()
+\end_layout
+
+\end_inset
+
+.
+ It uses the
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+tokenize()
+\end_layout
+
+\end_inset
+
+ function to determine the argument symbols and operand bit string.
+ Finally it uses the
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+instruction index
+\end_layout
+
+\end_inset
+
+ to determine the instruction width.
+\end_layout
+
+\begin_layout Itemize
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+second_pass(asm, label index)
+\end_layout
+
+\end_inset
+
+
+\end_layout
+
+\begin_layout Standard
+This function takes the pre-processed assembly code and
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+label index
+\end_layout
+
+\end_inset
+
+ output by
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+first_pass()
+\end_layout
+
+\end_inset
+
+ as input.
+ First it checks for
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+ORG
+\end_layout
+
+\end_inset
+
+ and
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+DB
+\end_layout
+
+\end_inset
+
+ statements and handles them if necessary.
+ Then it replaces any labels that were used before they were defined and
+ therefore not replaced on by
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+first_pass()
+\end_layout
+
+\end_inset
+
+ .
+ It uses the
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+instruction index
+\end_layout
+
+\end_inset
+
+ to determine the opcode and the width of the instruction, then it writes
+ the opcode and operand to the file.
+ If the combined width of the opcode and operand is greater than the instruction
+ width the function raises an error.
+
+\end_layout
+
+\begin_layout Itemize
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+tokenize(mnemonic, arguments)
+\end_layout
+
+\end_inset
+
+
+\end_layout
+
+\begin_layout Standard
+This function processes an instruction in order to produce a hashable symbol
+ that represents the format of its arguments.
+ This symbol is used to look up opcodes in the
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+instruction index
+\end_layout
+
+\end_inset
+
+.
+ It also detects string representations of numbers in the arguments and
+ stores a C type struct representation of the operands to be returned along
+ with the symbol.
+ It does this with the help of the
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+stoi()
+\end_layout
+
+\end_inset
+
+ function and Pythons
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+struct
+\end_layout
+
+\end_inset
+
+ module .
+\end_layout
+
+\begin_layout Itemize
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+stoi(string)
+\end_layout
+
+\end_inset
+
+
+\end_layout
+
+\begin_layout Standard
+This function is a general purpose function that is actually used throughout
+ the code, although mainly in the
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+tokenize()
+\end_layout
+
+\end_inset
+
+ function.
+ It takes a string as an input and tries to convert it to an integer using
+ Pythons integer representation syntax.
+ It can recognize decimal, octal, hexadecimal and binary numbers which are
+ denoted with different prefixes.
+ If it receives a string it can not represent as an integer it returns the
+ string 'NaN', (Not a Number)
+\end_layout
+
+\begin_layout Standard
+\begin_inset ERT
+status open
+
+\begin_layout Plain Layout
+
+
+\backslash
+bigskip
+\end_layout
+
+\end_inset
+
+
+\end_layout
+
+\begin_layout Standard
+Below is an abstract representation of each functions logical process.
+ The
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+first_pass()
+\end_layout
+
+\end_inset
+
+ and
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+second_pass()
+\end_layout
+
+\end_inset
+
+ are represented in pseudo-code, however
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+stoi()
+\end_layout
+
+\end_inset
+
+ and
+\begin_inset listings
+lstparams "basicstyle={\ttfamily}"
+inline true
+status open
+
+\begin_layout Plain Layout
+
+tokenize()
+\end_layout
+
+\end_inset
+
+ are more easily understood when represented as flowcharts.
+
+\end_layout
+
+\begin_layout Standard
+\begin_inset Newpage newpage
+\end_inset
+
+
+\end_layout
+
+\begin_layout Subsection
+first_pass()
+\end_layout
+
+\begin_layout Standard
+\begin_inset listings
+lstparams "basicstyle={\small\ttfamily},captionpos=b,frame=tb,framexbottommargin=3em,framextopmargin=3em,keywordstyle={\color{blue}},language=Python,showstringspaces=false,tabsize=4"
+inline false
+status open
+
+\begin_layout Plain Layout
+
+first_pass(source file):
+\end_layout
+
+\begin_layout Plain Layout
+
+\end_layout
+
+\begin_layout Plain Layout
+
+	address = 0
+\end_layout
+
+\begin_layout Plain Layout
+
+\end_layout
+
+\begin_layout Plain Layout
+
+	for statement in source file:
+\end_layout
+
+\begin_layout Plain Layout
+
+\end_layout
+
+\begin_layout Plain Layout
+
+		remove comments
+\end_layout
+
+\begin_layout Plain Layout
+
+
+\end_layout
+
+\begin_layout Plain Layout
+
+		for word in statement:
+\end_layout
+
+\begin_layout Plain Layout
+
+
+\end_layout
+
+\begin_layout Plain Layout
+
+			if word is in equate index:
+\end_layout
+
+\begin_layout Plain Layout
+
+				replace word with equated value
+\end_layout
+
+\begin_layout Plain Layout
+
+			else if word is in label index:
+\end_layout
+
+\begin_layout Plain Layout
+
+				replace word with address at label
+\end_layout
+
+\begin_layout Plain Layout
+
+
+\end_layout
+
+\begin_layout Plain Layout
+
+			if first word == 'org'
+\end_layout
+
+\begin_layout Plain Layout
+
+				address = second word
+\end_layout
+
+\begin_layout Plain Layout
+
+			else if last character of first word == ':':
+\end_layout
+
+\begin_layout Plain Layout
+
+				remove ':'
+\end_layout
+
+\begin_layout Plain Layout
+
+				add word = address to label index
+\end_layout
+
+\begin_layout Plain Layout
+
+				next statement
+\end_layout
+
+\begin_layout Plain Layout
+
+			else if second word == 'equ'
+\end_layout
+
+\begin_layout Plain Layout
+
+				add first word = third word to equate index
+\end_layout
+
+\begin_layout Plain Layout
+
+				next statement
+\end_layout
+
+\begin_layout Plain Layout
+
+
+\end_layout
+
+\begin_layout Plain Layout
+
+		mnemonic = first word
+\end_layout
+
+\begin_layout Plain Layout
+
+		arguments = [second word ...
+ last word]
+\end_layout
+
+\begin_layout Plain Layout
+
+
+\end_layout
+
+\begin_layout Plain Layout
+
+		symbol, constant = tokenize(arguments)
+\end_layout
+
+\begin_layout Plain Layout
+
+		if mnemonic == 'db':
+\end_layout
+
+\begin_layout Plain Layout
+
+			address = address + width of constant
+\end_layout
+
+\begin_layout Plain Layout
+
+			next statement
+\end_layout
+
+\begin_layout Plain Layout
+
+
+\end_layout
+
+\begin_layout Plain Layout
+
+        width = instruction index[mnemonic][symbol][width]
+\end_layout
+
+\begin_layout Plain Layout
+
+		address = address + width
+\end_layout
+
+\begin_layout Plain Layout
+
+
+\end_layout
+
+\begin_layout Plain Layout
+
+		append [mnemonic, argument, symbol, constant] to asm
+\end_layout
+
+\begin_layout Plain Layout
+
+\end_layout
+
+\begin_layout Plain Layout
+
+	return asm, label index
+\end_layout
+
+\end_inset
+
+
+\begin_inset Newpage newpage
+\end_inset
+
+
+\end_layout
+
+\begin_layout Subsection
+second_pass()
+\end_layout
+
+\begin_layout Standard
+\begin_inset listings
+lstparams "basicstyle={\small\ttfamily},breaklines=true,captionpos=b,frame=tb,framexbottommargin=3em,framextopmargin=3em,keywordstyle={\color{blue}},language=Python,tabsize=4"
+inline false
+status open
+
+\begin_layout Plain Layout
+
+second_pass(file, asm, label index):
+\end_layout
+
+\begin_layout Plain Layout
+
+\end_layout
+
+\begin_layout Plain Layout
+
+	address = 0
+\end_layout
+
+\begin_layout Plain Layout
+
+\end_layout
+
+\begin_layout Plain Layout
+
+	for line in asm:
+\end_layout
+
+\begin_layout Plain Layout
+
+\end_layout
+
+\begin_layout Plain Layout
+
+		file offset = address
+\end_layout
+
+\begin_layout Plain Layout
+
+
+\end_layout
+
+\begin_layout Plain Layout
+
+		mnemonic, arguments, symbol, constant = line
+\end_layout
+
+\begin_layout Plain Layout
+
+
+\end_layout
+
+\begin_layout Plain Layout
+
+		if mnemonic == 'org':
+\end_layout
+
+\begin_layout Plain Layout
+
+			address = first argument
+\end_layout
+
+\begin_layout Plain Layout
+
+			next line
+\end_layout
+
+\begin_layout Plain Layout
+
+		else if mnemonic == 'db':
+\end_layout
+
+\begin_layout Plain Layout
+
+			write constant to file
+\end_layout
+
+\begin_layout Plain Layout
+
+			address = address + width of constant
+\end_layout
+
+\begin_layout Plain Layout
+
+			next line
+\end_layout
+
+\begin_layout Plain Layout
+
+
+\end_layout
+
+\begin_layout Plain Layout
+
+		for argument in arguments:
+\end_layout
+
+\begin_layout Plain Layout
+
+			if argument is a label:
+\end_layout
+
+\begin_layout Plain Layout
+
+				replace argument with address at label
+\end_layout
+
+\begin_layout Plain Layout
+
+				symbol, data = tokenize(argument)
+\end_layout
+
+\begin_layout Plain Layout
+
+				append data to constant
+\end_layout
+
+\begin_layout Plain Layout
+
+
+\end_layout
+
+\begin_layout Plain Layout
+
+		op, width = instruction index[mnemonic][symbol]
+\end_layout
+
+\begin_layout Plain Layout
+
+
+\end_layout
+
+\begin_layout Plain Layout
+
+		write op to file
+\end_layout
+
+\begin_layout Plain Layout
+
+\end_layout
+
+\begin_layout Plain Layout
+
+		if width of constant - width + 1 > 0:
+\end_layout
+
+\begin_layout Plain Layout
+
+			raise error
+\end_layout
+
+\begin_layout Plain Layout
+
+		else if:
+\end_layout
+
+\begin_layout Plain Layout
+
+			write constant to file
+\end_layout
+
+\begin_layout Plain Layout
+
+			address = address.+ width
+\end_layout
+
+\begin_layout Plain Layout
+
+
+\end_layout
+
+\begin_layout Plain Layout
+
+	return file
+\end_layout
+
+\end_inset
+
+
+\begin_inset Newpage newpage
+\end_inset
+
+
+\end_layout
+
+\begin_layout Subsection
+tokenize()
+\end_layout
+
+\begin_layout Standard
+\begin_inset ERT
+status open
+
+\begin_layout Plain Layout
+
+
+\backslash
+bigskip
+\end_layout
+
+\end_inset
+
+
+\end_layout
+
+\begin_layout Standard
+\begin_inset Graphics
+	filename /home/jmz/qm/ede/doc/images/assembler/tokenize.svg
+	scale 55
+
+\end_inset
+
+
+\end_layout
+
+\begin_layout Standard
+\begin_inset Newpage newpage
+\end_inset
+
+
+\end_layout
+
+\begin_layout Subsection
+stoi()
+\end_layout
+
+\begin_layout Standard
+\begin_inset ERT
+status open
+
+\begin_layout Plain Layout
+
+
+\backslash
+bigskip
+\end_layout
+
+\end_inset
+
+
+\end_layout
+
+\begin_layout Description
+\begin_inset Graphics
+	filename /home/jmz/qm/ede/doc/images/assembler/stoi.svg
+	scale 70
+
+\end_inset
+
+
+\end_layout
+
+\begin_layout Standard
+\begin_inset Newpage newpage
+\end_inset
+
+
+\end_layout
+
+\begin_layout Section
+Testing
+\end_layout
+
+\end_body
+\end_document
Binary file doc/general/elb816_opcodes.ods has changed
Binary file doc/general/intro.pdf has changed
Binary file doc/general/report.odt has changed
Binary file doc/general/report.pdf has changed
Binary file doc/general/spec.odt has changed
Binary file doc/general/spec.pdf has changed
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/doc/general/timeline.planner	Thu Mar 06 20:24:49 2014 +0000
@@ -0,0 +1,817 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml" xmlns:date="http://exslt.org/dates-and-times">
+  <head>
+    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
+<!--
+              This file is generated from xml source: DO NOT EDIT
+      -->
+    <title>EDE - Planner</title>
+    <meta name="GENERATOR" content="Planner HTML output" />
+    <style type="text/css">
+
+/* CSS Stylesheet for Planner HTML output.
+ *
+ * Copyright (C) 2004-2005 Imendio AB
+ * Copyright (C) 2003 CodeFactory AB
+ * Copyright (C) 2003 Daniel Lundin (daniel@edgewall.com)
+ * Copyright (C) 2004 Chris Ladd (caladd@particlestorm.net)
+ */
+
+/*
+ * Fonts
+ */
+html,body,table {
+ font-family: "Bitstream Vera Sans", helvetica, Arial, sans-serif;
+ font-size: 12px;
+ white-space: nowrap;
+}
+
+tr,td,th,table,font,span,div,h1,h2,h3 {
+ font-family: "Bitstream Vera Sans", helvetica, Arial, sans-serif;
+}
+
+h1 {
+ font-size: 16px;
+}
+
+h2 {
+ font-size: 12px;
+ margin-bottom: 2px;
+}
+
+div.separator {
+ margin: 1em;
+}
+
+/*
+ * Header
+ */
+table.proj-header {
+ border: 0;
+ margin: 0;
+ width: auto;
+}
+
+table.proj-header .header {
+ font-weight: bold;
+}
+
+/*
+ * Footer
+ */
+.footer {
+ float: left;
+ width: 100%;
+ margin-top: 50px;
+ padding-top: 2px;
+ border-style: dotted;
+ border-width: 1px 0 0 0;
+ border-color: #999;
+ font-size: 9px;
+ text-align: right;
+ clear: both;
+ color: #666;
+}
+
+a:link, a:visited {
+ text-decoration: none;
+ color: #666;
+}
+
+a:hover[href] {
+ text-decoration: underline;
+}
+
+
+/*
+ * Layout
+ */
+
+.gantt, .gantt-tasklist, .gantt-chart, .tasklist, .resourcelist {
+ float: left;
+}
+
+.gantt-tasklist, .gantt-chart, .tasklist-table, .resourcelist-table {
+ border-style: solid;
+ border-width: 1px;
+ border-color: #aaa;
+}
+
+.gantt-tasklist, .gantt-chart, .tasklist, .resourcelist {
+ overflow: auto;
+}
+
+.gantt, .tasklist, .resourcelist {
+  clear: both;
+  width: 100%;
+}
+
+.gantt-tasklist {
+ border-width: 1px 0px 1px 1px;
+ width: 30%;
+}
+
+.gantt-chart {
+ border-color: #aaa #aaa #aaa #fff;
+ width: 69.5%;
+}
+
+.tasklist, .resourcelist {
+ clear: left;
+}
+
+table {
+ width: 100%;
+ border-collapse: collapse;
+ border-style: none;
+ border-color: #fff;
+ white-space: nowrap;
+ margin: 0;
+}
+
+tr, td, th {
+ white-space: nowrap;
+ vertical-align: top;
+ padding-top: 1px;
+ padding-bottom: 1px;
+}
+
+th {
+ vertical-align: top;
+}
+
+tr {
+ height: 1.5em;
+}
+
+tr.header {
+ background-color: #aaa;
+ color: #fff;
+}
+
+tr.even {
+ background-color: #eee;
+}
+
+tr.odd {
+ background-color: #fff;
+}
+
+th span, td span {
+ margin-left: 6px;
+ margin-right: 6px;
+}
+
+th.note {
+ min-width: 20em;
+}
+
+td.note {
+ white-space: normal;
+}
+
+/*
+ * Gantt
+ */
+div.gantt-empty-begin, div.gantt-empty-end, div.gantt-complete-done, div.gantt-complete-notdone, div.gantt-summary {
+ overflow: hidden;
+ clear: none;
+ float: left;
+ height: 0.75em;
+ margin-top: 0.15em;
+ margin-bottom: 0;
+}
+
+div.gantt-complete-done {
+ background-color: #495f6b;
+ height: 0.75em;
+ margin-top: 0;
+ margin-bottom: 0;
+}
+
+div.gantt-complete-notdone {
+ background-color: #8db6cd;
+ border-style: solid;
+ border-width: 1px;
+}
+
+div.gantt-summary {
+ height: 0.3em;
+ margin-top: 0.25em;
+ border-bottom: 2px dashed #000;
+}
+
+div.gantt-empty-end {
+ margin-left: 0;
+}
+
+div.gantt-milestone {
+ float: left;
+ font-size: 0.9em;
+ color: #000000;
+ position: relative;
+ margin-left: 0;
+ margin-right: 0;
+}
+
+div.gantt-resources {
+ float: left;
+ margin-left: 0.5em;
+ white-space: nowrap;
+}
+
+th.gantt-1day-header {
+  width: 19px;
+}
+
+th.gantt-2day-header {
+  width: 39px;
+}
+
+th.gantt-3day-header {
+  width: 59px;
+}
+
+th.gantt-4day-header {
+  width: 79px;
+}
+
+th.gantt-5day-header {
+  width: 99px;
+}
+
+th.gantt-6day-header {
+  width: 119px;
+}
+
+th.gantt-week-header, .gantt-resources {
+ width: 139px;
+}
+
+th.gantt-day-header {
+ margin: 0;
+ padding-top: 1px;
+ padding-bottom: 1px;
+ width: 19px;
+}
+
+</style>
+<!--[if IE]><style type="text/css">
+
+/* IE specific overrides to compensate for the different box model used by IE
+ * (see http://en.wikipedia.org/wiki/Internet_Explorer_box_model_bug)
+ */
+
+.gantt-resources {
+  overflow: hidden;
+}
+
+
+.tasklist, .resourcelist {
+  overflow-x: auto;
+  overflow-y: hidden;
+  padding-bottom: 1em;
+}
+
+
+.gantt-tasklist, .gantt-chart {
+  overflow-x: scroll;
+  overflow-y: hidden;
+}
+
+
+.gantt-chart {
+  padding-bottom: 1px;
+}
+
+
+
+.tasklist-table, .resourcelist-table {
+  width: 99.8%;
+}
+
+/*
+div.gantt-empty-begin, div.gantt-empty-end, div.gantt-complete-done, div.gantt-complete-notdone, div.gantt-summary {
+ height: 1.75em;
+}
+
+div.gantt-complete-done {
+ height: 0.75em;
+}
+
+div.gantt-summary {
+ height: 0.3em;
+}
+*/
+th.gantt-1day-header {
+  width: 20px;
+}
+
+th.gantt-2day-header {
+  width: 40px;
+}
+
+th.gantt-3day-header {
+  width: 60px;
+}
+
+th.gantt-4day-header {
+  width: 80px;
+}
+
+th.gantt-5day-header {
+  width: 100px;
+}
+
+th.gantt-6day-header {
+  width: 120px;
+}
+
+th.gantt-week-header {
+ width: 140px;
+}
+
+th.gantt-day-header {
+ width: 20px;
+}
+
+</style><![endif]-->
+<!--[if gte IE 7]><style type="text/css">
+
+.gantt-chart {
+  padding-bottom: 0px;
+}
+
+</style><![endif]-->
+  </head>
+  <body>
+    <h1 class="proj-title">
+      <a name="project" id="project">EDE</a>
+    </h1>
+    <table class="proj-header">
+      <tr>
+        <td class="header">Start:</td>
+        <td>November 1, 2013</td>
+      </tr>
+      <tr>
+        <td class="header">Finish:</td>
+        <td>March 31, 2014</td>
+      </tr>
+    </table>
+    <div class="separator"></div>
+    <div class="gantt">
+      <h2>
+        <a name="gantt" id="gantt">Gantt Chart</a>
+      </h2>
+      <div class="gantt-tasklist">
+        <table cellspacing="0" cellpadding="0" border="1">
+          <tr class="header" align="left">
+            <th>
+              <span>Name</span>
+            </th>
+            <th>
+              <span>Work</span>
+            </th>
+          </tr>
+          <tr class="header">
+            <th> </th>
+            <th> </th>
+          </tr>
+          <tr class="odd">
+            <td>
+              <a name="gantt-1" style="white-space: nowrap; margin-left: 0px;" id="gantt-1">
+                <span>Project report</span>
+              </a>
+            </td>
+            <td>
+              <span>151d </span>
+            </td>
+          </tr>
+          <tr class="even">
+            <td>
+              <a name="gantt-2" style="white-space: nowrap; margin-left: 0px;" id="gantt-2">
+                <span>Assembler development</span>
+              </a>
+            </td>
+            <td>
+              <span>14d </span>
+            </td>
+          </tr>
+          <tr class="odd">
+            <td>
+              <a name="gantt-3" style="white-space: nowrap; margin-left: 0px;" id="gantt-3">
+                <span>Emulator development (PC)</span>
+              </a>
+            </td>
+            <td>
+              <span>61d </span>
+            </td>
+          </tr>
+          <tr class="even">
+            <td>
+              <a name="gantt-4" style="white-space: nowrap; margin-left: 0px;" id="gantt-4">
+                <span>Emulator development (MCS-51)</span>
+              </a>
+            </td>
+            <td>
+              <span>45d </span>
+            </td>
+          </tr>
+          <tr class="odd">
+            <td>
+              <a name="gantt-5" style="white-space: nowrap; margin-left: 0px;" id="gantt-5">
+                <span>Debugger development</span>
+              </a>
+            </td>
+            <td>
+              <span>106d </span>
+            </td>
+          </tr>
+          <tr class="even">
+            <td>
+              <a name="gantt-6" style="white-space: nowrap; margin-left: 0px;" id="gantt-6">
+                <span>Testing</span>
+              </a>
+            </td>
+            <td>
+              <span>151d </span>
+            </td>
+          </tr>
+        </table>
+      </div>
+      <div class="gantt-chart">
+        <table cellspacing="0" cellpadding="0" border="1" style="table-layout: fixed;">
+          <tr class="header" align="left">
+            <th class="gantt-3day-header" colspan="3"></th>
+            <th class="gantt-week-header" align="center" colspan="7">Week 45, 2013</th>
+            <th class="gantt-week-header" align="center" colspan="7">Week 46, 2013</th>
+            <th class="gantt-week-header" align="center" colspan="7">Week 47, 2013</th>
+            <th class="gantt-week-header" align="center" colspan="7">Week 48, 2013</th>
+            <th class="gantt-week-header" align="center" colspan="7">Week 49, 2013</th>
+            <th class="gantt-week-header" align="center" colspan="7">Week 50, 2013</th>
+            <th class="gantt-week-header" align="center" colspan="7">Week 51, 2013</th>
+            <th class="gantt-week-header" align="center" colspan="7">Week 52, 2013</th>
+            <th class="gantt-week-header" align="center" colspan="7">Week 1, 2014</th>
+            <th class="gantt-week-header" align="center" colspan="7">Week 2, 2014</th>
+            <th class="gantt-week-header" align="center" colspan="7">Week 3, 2014</th>
+            <th class="gantt-week-header" align="center" colspan="7">Week 4, 2014</th>
+            <th class="gantt-week-header" align="center" colspan="7">Week 5, 2014</th>
+            <th class="gantt-week-header" align="center" colspan="7">Week 6, 2014</th>
+            <th class="gantt-week-header" align="center" colspan="7">Week 7, 2014</th>
+            <th class="gantt-week-header" align="center" colspan="7">Week 8, 2014</th>
+            <th class="gantt-week-header" align="center" colspan="7">Week 9, 2014</th>
+            <th class="gantt-week-header" align="center" colspan="7">Week 10, 2014</th>
+            <th class="gantt-week-header" align="center" colspan="7">Week 11, 2014</th>
+            <th class="gantt-week-header" align="center" colspan="7">Week 12, 2014</th>
+            <th class="gantt-week-header" align="center" colspan="7">Week 13, 2014</th>
+            <th class="gantt-week-header" align="center" colspan="7">Week 14, 2014</th>
+            <th class="gantt-1day-header" colspan="1"></th>
+            <th></th>
+          </tr>
+          <tr class="header" align="left">
+            <th class="gantt-day-header" align="center">1</th>
+            <th class="gantt-day-header" align="center">2</th>
+            <th class="gantt-day-header" align="center">3</th>
+            <th class="gantt-day-header" align="center">4</th>
+            <th class="gantt-day-header" align="center">5</th>
+            <th class="gantt-day-header" align="center">6</th>
+            <th class="gantt-day-header" align="center">7</th>
+            <th class="gantt-day-header" align="center">8</th>
+            <th class="gantt-day-header" align="center">9</th>
+            <th class="gantt-day-header" align="center">10</th>
+            <th class="gantt-day-header" align="center">11</th>
+            <th class="gantt-day-header" align="center">12</th>
+            <th class="gantt-day-header" align="center">13</th>
+            <th class="gantt-day-header" align="center">14</th>
+            <th class="gantt-day-header" align="center">15</th>
+            <th class="gantt-day-header" align="center">16</th>
+            <th class="gantt-day-header" align="center">17</th>
+            <th class="gantt-day-header" align="center">18</th>
+            <th class="gantt-day-header" align="center">19</th>
+            <th class="gantt-day-header" align="center">20</th>
+            <th class="gantt-day-header" align="center">21</th>
+            <th class="gantt-day-header" align="center">22</th>
+            <th class="gantt-day-header" align="center">23</th>
+            <th class="gantt-day-header" align="center">24</th>
+            <th class="gantt-day-header" align="center">25</th>
+            <th class="gantt-day-header" align="center">26</th>
+            <th class="gantt-day-header" align="center">27</th>
+            <th class="gantt-day-header" align="center">28</th>
+            <th class="gantt-day-header" align="center">29</th>
+            <th class="gantt-day-header" align="center">30</th>
+            <th class="gantt-day-header" align="center">1</th>
+            <th class="gantt-day-header" align="center">2</th>
+            <th class="gantt-day-header" align="center">3</th>
+            <th class="gantt-day-header" align="center">4</th>
+            <th class="gantt-day-header" align="center">5</th>
+            <th class="gantt-day-header" align="center">6</th>
+            <th class="gantt-day-header" align="center">7</th>
+            <th class="gantt-day-header" align="center">8</th>
+            <th class="gantt-day-header" align="center">9</th>
+            <th class="gantt-day-header" align="center">10</th>
+            <th class="gantt-day-header" align="center">11</th>
+            <th class="gantt-day-header" align="center">12</th>
+            <th class="gantt-day-header" align="center">13</th>
+            <th class="gantt-day-header" align="center">14</th>
+            <th class="gantt-day-header" align="center">15</th>
+            <th class="gantt-day-header" align="center">16</th>
+            <th class="gantt-day-header" align="center">17</th>
+            <th class="gantt-day-header" align="center">18</th>
+            <th class="gantt-day-header" align="center">19</th>
+            <th class="gantt-day-header" align="center">20</th>
+            <th class="gantt-day-header" align="center">21</th>
+            <th class="gantt-day-header" align="center">22</th>
+            <th class="gantt-day-header" align="center">23</th>
+            <th class="gantt-day-header" align="center">24</th>
+            <th class="gantt-day-header" align="center">25</th>
+            <th class="gantt-day-header" align="center">26</th>
+            <th class="gantt-day-header" align="center">27</th>
+            <th class="gantt-day-header" align="center">28</th>
+            <th class="gantt-day-header" align="center">29</th>
+            <th class="gantt-day-header" align="center">30</th>
+            <th class="gantt-day-header" align="center">31</th>
+            <th class="gantt-day-header" align="center">1</th>
+            <th class="gantt-day-header" align="center">2</th>
+            <th class="gantt-day-header" align="center">3</th>
+            <th class="gantt-day-header" align="center">4</th>
+            <th class="gantt-day-header" align="center">5</th>
+            <th class="gantt-day-header" align="center">6</th>
+            <th class="gantt-day-header" align="center">7</th>
+            <th class="gantt-day-header" align="center">8</th>
+            <th class="gantt-day-header" align="center">9</th>
+            <th class="gantt-day-header" align="center">10</th>
+            <th class="gantt-day-header" align="center">11</th>
+            <th class="gantt-day-header" align="center">12</th>
+            <th class="gantt-day-header" align="center">13</th>
+            <th class="gantt-day-header" align="center">14</th>
+            <th class="gantt-day-header" align="center">15</th>
+            <th class="gantt-day-header" align="center">16</th>
+            <th class="gantt-day-header" align="center">17</th>
+            <th class="gantt-day-header" align="center">18</th>
+            <th class="gantt-day-header" align="center">19</th>
+            <th class="gantt-day-header" align="center">20</th>
+            <th class="gantt-day-header" align="center">21</th>
+            <th class="gantt-day-header" align="center">22</th>
+            <th class="gantt-day-header" align="center">23</th>
+            <th class="gantt-day-header" align="center">24</th>
+            <th class="gantt-day-header" align="center">25</th>
+            <th class="gantt-day-header" align="center">26</th>
+            <th class="gantt-day-header" align="center">27</th>
+            <th class="gantt-day-header" align="center">28</th>
+            <th class="gantt-day-header" align="center">29</th>
+            <th class="gantt-day-header" align="center">30</th>
+            <th class="gantt-day-header" align="center">31</th>
+            <th class="gantt-day-header" align="center">1</th>
+            <th class="gantt-day-header" align="center">2</th>
+            <th class="gantt-day-header" align="center">3</th>
+            <th class="gantt-day-header" align="center">4</th>
+            <th class="gantt-day-header" align="center">5</th>
+            <th class="gantt-day-header" align="center">6</th>
+            <th class="gantt-day-header" align="center">7</th>
+            <th class="gantt-day-header" align="center">8</th>
+            <th class="gantt-day-header" align="center">9</th>
+            <th class="gantt-day-header" align="center">10</th>
+            <th class="gantt-day-header" align="center">11</th>
+            <th class="gantt-day-header" align="center">12</th>
+            <th class="gantt-day-header" align="center">13</th>
+            <th class="gantt-day-header" align="center">14</th>
+            <th class="gantt-day-header" align="center">15</th>
+            <th class="gantt-day-header" align="center">16</th>
+            <th class="gantt-day-header" align="center">17</th>
+            <th class="gantt-day-header" align="center">18</th>
+            <th class="gantt-day-header" align="center">19</th>
+            <th class="gantt-day-header" align="center">20</th>
+            <th class="gantt-day-header" align="center">21</th>
+            <th class="gantt-day-header" align="center">22</th>
+            <th class="gantt-day-header" align="center">23</th>
+            <th class="gantt-day-header" align="center">24</th>
+            <th class="gantt-day-header" align="center">25</th>
+            <th class="gantt-day-header" align="center">26</th>
+            <th class="gantt-day-header" align="center">27</th>
+            <th class="gantt-day-header" align="center">28</th>
+            <th class="gantt-day-header" align="center">1</th>
+            <th class="gantt-day-header" align="center">2</th>
+            <th class="gantt-day-header" align="center">3</th>
+            <th class="gantt-day-header" align="center">4</th>
+            <th class="gantt-day-header" align="center">5</th>
+            <th class="gantt-day-header" align="center">6</th>
+            <th class="gantt-day-header" align="center">7</th>
+            <th class="gantt-day-header" align="center">8</th>
+            <th class="gantt-day-header" align="center">9</th>
+            <th class="gantt-day-header" align="center">10</th>
+            <th class="gantt-day-header" align="center">11</th>
+            <th class="gantt-day-header" align="center">12</th>
+            <th class="gantt-day-header" align="center">13</th>
+            <th class="gantt-day-header" align="center">14</th>
+            <th class="gantt-day-header" align="center">15</th>
+            <th class="gantt-day-header" align="center">16</th>
+            <th class="gantt-day-header" align="center">17</th>
+            <th class="gantt-day-header" align="center">18</th>
+            <th class="gantt-day-header" align="center">19</th>
+            <th class="gantt-day-header" align="center">20</th>
+            <th class="gantt-day-header" align="center">21</th>
+            <th class="gantt-day-header" align="center">22</th>
+            <th class="gantt-day-header" align="center">23</th>
+            <th class="gantt-day-header" align="center">24</th>
+            <th class="gantt-day-header" align="center">25</th>
+            <th class="gantt-day-header" align="center">26</th>
+            <th class="gantt-day-header" align="center">27</th>
+            <th class="gantt-day-header" align="center">28</th>
+            <th class="gantt-day-header" align="center">29</th>
+            <th class="gantt-day-header" align="center">30</th>
+            <th class="gantt-day-header" align="center">31</th>
+            <th class="gantt-day-header" align="center">1</th>
+            <th class="gantt-day-header" align="center">2</th>
+            <th class="gantt-day-header" align="center">3</th>
+            <th class="gantt-day-header" align="center">4</th>
+            <th class="gantt-day-header" align="center">5</th>
+            <th class="gantt-day-header" align="center">6</th>
+            <th class="gantt-day-header" align="center">7</th>
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+                <div class="gantt-empty-end"></div>
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+          <tr class="odd">
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+                <div class="gantt-empty-end"></div>
+                <div class="gantt-resources"></div>
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+              <div style="width: 3161px; white-space: nowrap;">
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+                <div class="gantt-empty-end"></div>
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+    <div class="separator"></div>
+    <div class="tasklist">
+      <h2>
+        <a name="tasks" id="tasks">Tasks</a>
+      </h2>
+      <div class="tasklist-table">
+        <table cellspacing="0" cellpadding="0" border="1">
+          <tr class="header" align="left">
+            <th>
+              <span>Name</span>
+            </th>
+            <th>
+              <span>Start</span>
+            </th>
+            <th>
+              <span>Finish</span>
+            </th>
+            <th>
+              <span>Work</span>
+            </th>
+          </tr>
+          <tr class="odd" style="">
+            <td>
+              <a name="task1" style="margin-left: 0px" id="task1">
+                <span>Project report</span>
+              </a>
+            </td>
+            <td>
+              <span>Nov 1</span>
+            </td>
+            <td>
+              <span>Mar 31</span>
+            </td>
+            <td>
+              <span>151d </span>
+            </td>
+          </tr>
+          <tr class="even" style="">
+            <td>
+              <a name="task2" style="margin-left: 0px" id="task2">
+                <span>Assembler development</span>
+              </a>
+            </td>
+            <td>
+              <span>Nov 1</span>
+            </td>
+            <td>
+              <span>Nov 14</span>
+            </td>
+            <td>
+              <span>14d </span>
+            </td>
+          </tr>
+          <tr class="odd" style="">
+            <td>
+              <a name="task3" style="margin-left: 0px" id="task3">
+                <span>Emulator development (PC)</span>
+              </a>
+            </td>
+            <td>
+              <span>Nov 15</span>
+            </td>
+            <td>
+              <span>Jan 14</span>
+            </td>
+            <td>
+              <span>61d </span>
+            </td>
+          </tr>
+          <tr class="even" style="">
+            <td>
+              <a name="task4" style="margin-left: 0px" id="task4">
+                <span>Emulator development (MCS-51)</span>
+              </a>
+            </td>
+            <td>
+              <span>Jan 15</span>
+            </td>
+            <td>
+              <span>Feb 28</span>
+            </td>
+            <td>
+              <span>45d </span>
+            </td>
+          </tr>
+          <tr class="odd" style="">
+            <td>
+              <a name="task5" style="margin-left: 0px" id="task5">
+                <span>Debugger development</span>
+              </a>
+            </td>
+            <td>
+              <span>Nov 15</span>
+            </td>
+            <td>
+              <span>Feb 28</span>
+            </td>
+            <td>
+              <span>106d </span>
+            </td>
+          </tr>
+          <tr class="even" style="">
+            <td>
+              <a name="task6" style="margin-left: 0px" id="task6">
+                <span>Testing</span>
+              </a>
+            </td>
+            <td>
+              <span>Nov 1</span>
+            </td>
+            <td>
+              <span>Mar 31</span>
+            </td>
+            <td>
+              <span>151d </span>
+            </td>
+          </tr>
+        </table>
+      </div>
+    </div>
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+         style="font-size:18px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-family:Latin Modern Mono;-inkscape-font-specification:Latin Modern Mono">is s hex?</tspan></text>
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-            <th class="gantt-day-header" align="center">25</th>
-            <th class="gantt-day-header" align="center">26</th>
-            <th class="gantt-day-header" align="center">27</th>
-            <th class="gantt-day-header" align="center">28</th>
-            <th class="gantt-day-header" align="center">29</th>
-            <th class="gantt-day-header" align="center">30</th>
-            <th class="gantt-day-header" align="center">31</th>
-            <th class="gantt-day-header" align="center">1</th>
-            <th class="gantt-day-header" align="center">2</th>
-            <th class="gantt-day-header" align="center">3</th>
-            <th class="gantt-day-header" align="center">4</th>
-            <th class="gantt-day-header" align="center">5</th>
-            <th class="gantt-day-header" align="center">6</th>
-            <th class="gantt-day-header" align="center">7</th>
-            <th class="gantt-day-header" align="center">8</th>
-            <th class="gantt-day-header" align="center">9</th>
-            <th class="gantt-day-header" align="center">10</th>
-            <th class="gantt-day-header" align="center">11</th>
-            <th class="gantt-day-header" align="center">12</th>
-            <th class="gantt-day-header" align="center">13</th>
-            <th class="gantt-day-header" align="center">14</th>
-            <th class="gantt-day-header" align="center">15</th>
-            <th class="gantt-day-header" align="center">16</th>
-            <th class="gantt-day-header" align="center">17</th>
-            <th class="gantt-day-header" align="center">18</th>
-            <th class="gantt-day-header" align="center">19</th>
-            <th class="gantt-day-header" align="center">20</th>
-            <th class="gantt-day-header" align="center">21</th>
-            <th class="gantt-day-header" align="center">22</th>
-            <th class="gantt-day-header" align="center">23</th>
-            <th class="gantt-day-header" align="center">24</th>
-            <th class="gantt-day-header" align="center">25</th>
-            <th class="gantt-day-header" align="center">26</th>
-            <th class="gantt-day-header" align="center">27</th>
-            <th class="gantt-day-header" align="center">28</th>
-            <th class="gantt-day-header" align="center">29</th>
-            <th class="gantt-day-header" align="center">30</th>
-            <th class="gantt-day-header" align="center">31</th>
-            <th class="gantt-day-header" align="center">1</th>
-            <th class="gantt-day-header" align="center">2</th>
-            <th class="gantt-day-header" align="center">3</th>
-            <th class="gantt-day-header" align="center">4</th>
-            <th class="gantt-day-header" align="center">5</th>
-            <th class="gantt-day-header" align="center">6</th>
-            <th class="gantt-day-header" align="center">7</th>
-            <th class="gantt-day-header" align="center">8</th>
-            <th class="gantt-day-header" align="center">9</th>
-            <th class="gantt-day-header" align="center">10</th>
-            <th class="gantt-day-header" align="center">11</th>
-            <th class="gantt-day-header" align="center">12</th>
-            <th class="gantt-day-header" align="center">13</th>
-            <th class="gantt-day-header" align="center">14</th>
-            <th class="gantt-day-header" align="center">15</th>
-            <th class="gantt-day-header" align="center">16</th>
-            <th class="gantt-day-header" align="center">17</th>
-            <th class="gantt-day-header" align="center">18</th>
-            <th class="gantt-day-header" align="center">19</th>
-            <th class="gantt-day-header" align="center">20</th>
-            <th class="gantt-day-header" align="center">21</th>
-            <th class="gantt-day-header" align="center">22</th>
-            <th class="gantt-day-header" align="center">23</th>
-            <th class="gantt-day-header" align="center">24</th>
-            <th class="gantt-day-header" align="center">25</th>
-            <th class="gantt-day-header" align="center">26</th>
-            <th class="gantt-day-header" align="center">27</th>
-            <th class="gantt-day-header" align="center">28</th>
-            <th class="gantt-day-header" align="center">1</th>
-            <th class="gantt-day-header" align="center">2</th>
-            <th class="gantt-day-header" align="center">3</th>
-            <th class="gantt-day-header" align="center">4</th>
-            <th class="gantt-day-header" align="center">5</th>
-            <th class="gantt-day-header" align="center">6</th>
-            <th class="gantt-day-header" align="center">7</th>
-            <th class="gantt-day-header" align="center">8</th>
-            <th class="gantt-day-header" align="center">9</th>
-            <th class="gantt-day-header" align="center">10</th>
-            <th class="gantt-day-header" align="center">11</th>
-            <th class="gantt-day-header" align="center">12</th>
-            <th class="gantt-day-header" align="center">13</th>
-            <th class="gantt-day-header" align="center">14</th>
-            <th class="gantt-day-header" align="center">15</th>
-            <th class="gantt-day-header" align="center">16</th>
-            <th class="gantt-day-header" align="center">17</th>
-            <th class="gantt-day-header" align="center">18</th>
-            <th class="gantt-day-header" align="center">19</th>
-            <th class="gantt-day-header" align="center">20</th>
-            <th class="gantt-day-header" align="center">21</th>
-            <th class="gantt-day-header" align="center">22</th>
-            <th class="gantt-day-header" align="center">23</th>
-            <th class="gantt-day-header" align="center">24</th>
-            <th class="gantt-day-header" align="center">25</th>
-            <th class="gantt-day-header" align="center">26</th>
-            <th class="gantt-day-header" align="center">27</th>
-            <th class="gantt-day-header" align="center">28</th>
-            <th class="gantt-day-header" align="center">29</th>
-            <th class="gantt-day-header" align="center">30</th>
-            <th class="gantt-day-header" align="center">31</th>
-            <th class="gantt-day-header" align="center">1</th>
-            <th class="gantt-day-header" align="center">2</th>
-            <th class="gantt-day-header" align="center">3</th>
-            <th class="gantt-day-header" align="center">4</th>
-            <th class="gantt-day-header" align="center">5</th>
-            <th class="gantt-day-header" align="center">6</th>
-            <th class="gantt-day-header" align="center">7</th>
-            <th align="center"></th>
-          </tr>
-          <tr class="odd">
-            <td colspan="159">
-              <div style="width: 3161px; white-space: nowrap;">
-                <div class="gantt-empty-begin" style="width: 6px;"></div>
-                <div class="gantt-complete-notdone" style="width: 3008px;"></div>
-                <div class="gantt-empty-end"></div>
-                <div class="gantt-resources"></div>
-              </div>
-            </td>
-          </tr>
-          <tr class="even">
-            <td colspan="159">
-              <div style="width: 3161px; white-space: nowrap;">
-                <div class="gantt-empty-begin" style="width: 6px;"></div>
-                <div class="gantt-complete-notdone" style="width: 268px;"></div>
-                <div class="gantt-empty-end"></div>
-                <div class="gantt-resources"></div>
-              </div>
-            </td>
-          </tr>
-          <tr class="odd">
-            <td colspan="159">
-              <div style="width: 3161px; white-space: nowrap;">
-                <div class="gantt-empty-begin" style="width: 286px;"></div>
-                <div class="gantt-complete-notdone" style="width: 1208px;"></div>
-                <div class="gantt-empty-end"></div>
-                <div class="gantt-resources"></div>
-              </div>
-            </td>
-          </tr>
-          <tr class="even">
-            <td colspan="159">
-              <div style="width: 3161px; white-space: nowrap;">
-                <div class="gantt-empty-begin" style="width: 1506px;"></div>
-                <div class="gantt-complete-notdone" style="width: 888px;"></div>
-                <div class="gantt-empty-end"></div>
-                <div class="gantt-resources"></div>
-              </div>
-            </td>
-          </tr>
-          <tr class="odd">
-            <td colspan="159">
-              <div style="width: 3161px; white-space: nowrap;">
-                <div class="gantt-empty-begin" style="width: 286px;"></div>
-                <div class="gantt-complete-notdone" style="width: 2108px;"></div>
-                <div class="gantt-empty-end"></div>
-                <div class="gantt-resources"></div>
-              </div>
-            </td>
-          </tr>
-          <tr class="even">
-            <td colspan="159">
-              <div style="width: 3161px; white-space: nowrap;">
-                <div class="gantt-empty-begin" style="width: 6px;"></div>
-                <div class="gantt-complete-notdone" style="width: 3008px;"></div>
-                <div class="gantt-empty-end"></div>
-                <div class="gantt-resources"></div>
-              </div>
-            </td>
-          </tr>
-        </table>
-      </div>
-    </div>
-    <div class="separator"></div>
-    <div class="tasklist">
-      <h2>
-        <a name="tasks" id="tasks">Tasks</a>
-      </h2>
-      <div class="tasklist-table">
-        <table cellspacing="0" cellpadding="0" border="1">
-          <tr class="header" align="left">
-            <th>
-              <span>Name</span>
-            </th>
-            <th>
-              <span>Start</span>
-            </th>
-            <th>
-              <span>Finish</span>
-            </th>
-            <th>
-              <span>Work</span>
-            </th>
-          </tr>
-          <tr class="odd" style="">
-            <td>
-              <a name="task1" style="margin-left: 0px" id="task1">
-                <span>Project report</span>
-              </a>
-            </td>
-            <td>
-              <span>Nov 1</span>
-            </td>
-            <td>
-              <span>Mar 31</span>
-            </td>
-            <td>
-              <span>151d </span>
-            </td>
-          </tr>
-          <tr class="even" style="">
-            <td>
-              <a name="task2" style="margin-left: 0px" id="task2">
-                <span>Assembler development</span>
-              </a>
-            </td>
-            <td>
-              <span>Nov 1</span>
-            </td>
-            <td>
-              <span>Nov 14</span>
-            </td>
-            <td>
-              <span>14d </span>
-            </td>
-          </tr>
-          <tr class="odd" style="">
-            <td>
-              <a name="task3" style="margin-left: 0px" id="task3">
-                <span>Emulator development (PC)</span>
-              </a>
-            </td>
-            <td>
-              <span>Nov 15</span>
-            </td>
-            <td>
-              <span>Jan 14</span>
-            </td>
-            <td>
-              <span>61d </span>
-            </td>
-          </tr>
-          <tr class="even" style="">
-            <td>
-              <a name="task4" style="margin-left: 0px" id="task4">
-                <span>Emulator development (MCS-51)</span>
-              </a>
-            </td>
-            <td>
-              <span>Jan 15</span>
-            </td>
-            <td>
-              <span>Feb 28</span>
-            </td>
-            <td>
-              <span>45d </span>
-            </td>
-          </tr>
-          <tr class="odd" style="">
-            <td>
-              <a name="task5" style="margin-left: 0px" id="task5">
-                <span>Debugger development</span>
-              </a>
-            </td>
-            <td>
-              <span>Nov 15</span>
-            </td>
-            <td>
-              <span>Feb 28</span>
-            </td>
-            <td>
-              <span>106d </span>
-            </td>
-          </tr>
-          <tr class="even" style="">
-            <td>
-              <a name="task6" style="margin-left: 0px" id="task6">
-                <span>Testing</span>
-              </a>
-            </td>
-            <td>
-              <span>Nov 1</span>
-            </td>
-            <td>
-              <span>Mar 31</span>
-            </td>
-            <td>
-              <span>151d </span>
-            </td>
-          </tr>
-        </table>
-      </div>
-    </div>
-  </body>
-</html>
--- a/doc/timeline.planner	Fri Feb 28 17:21:11 2014 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,42 +0,0 @@
-<?xml version="1.0"?>
-<project name="EDE" company="" manager="" phase="" project-start="20131101T000000Z" mrproject-version="2" calendar="1">
-  <properties/>
-  <phases/>
-  <calendars>
-    <day-types>
-      <day-type id="0" name="Working" description="A default working day"/>
-      <day-type id="1" name="Nonworking" description="A default non working day"/>
-      <day-type id="2" name="Use base" description="Use day from base calendar"/>
-    </day-types>
-    <calendar id="1" name="Default">
-      <default-week mon="0" tue="0" wed="0" thu="0" fri="0" sat="0" sun="0"/>
-      <overridden-day-types>
-        <overridden-day-type id="0">
-          <interval start="0800" end="1200"/>
-          <interval start="1300" end="1700"/>
-        </overridden-day-type>
-      </overridden-day-types>
-      <days>
-        <day date="20131102" type="day-type" id="0"/>
-        <day date="20131103" type="day-type" id="0"/>
-      </days>
-    </calendar>
-  </calendars>
-  <tasks>
-    <task id="1" name="Project report" note="" work="4348800" start="20131101T000000Z" end="20140331T170000Z" work-start="20131101T080000Z" percent-complete="0" priority="0" type="normal" scheduling="fixed-work"/>
-    <task id="2" name="Assembler development" note="" work="403200" start="20131101T000000Z" end="20131114T170000Z" work-start="20131101T080000Z" percent-complete="0" priority="0" type="normal" scheduling="fixed-work"/>
-    <task id="3" name="Emulator development (PC)" note="" work="1756800" start="20131115T000000Z" end="20140114T170000Z" work-start="20131115T080000Z" percent-complete="0" priority="0" type="normal" scheduling="fixed-work">
-      <constraint type="must-start-on" time="20131115T000000Z"/>
-    </task>
-    <task id="4" name="Emulator development (MCS-51)" note="" work="1296000" start="20140115T000000Z" end="20140228T170000Z" work-start="20140115T080000Z" percent-complete="0" priority="0" type="normal" scheduling="fixed-work">
-      <constraint type="must-start-on" time="20140115T000000Z"/>
-    </task>
-    <task id="5" name="Debugger development" note="" work="3052800" start="20131115T000000Z" end="20140228T170000Z" work-start="20131115T080000Z" percent-complete="0" priority="0" type="normal" scheduling="fixed-work">
-      <constraint type="must-start-on" time="20131115T000000Z"/>
-    </task>
-    <task id="6" name="Testing" note="" work="4348800" start="20131101T000000Z" end="20140331T170000Z" work-start="20131101T080000Z" percent-complete="0" priority="0" type="normal" scheduling="fixed-work"/>
-  </tasks>
-  <resource-groups/>
-  <resources/>
-  <allocations/>
-</project>