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\begin_layout Part
Introduction
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\begin_layout Section
Motivations
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\begin_layout Standard
The ELB816 architecture is designed to be a 
\begin_inset Quotes eld
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simple to understand 8-bit microprocessor system to help learn about micro-proce
ssor electronics.
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.
 The combination of an ELB816 emulator, debugger and assembler could be
 used as a set of tools for learning or teaching micro-processor programming
 without the intricacies of real-world commercial micro-processors getting
 in the way of a fundamental understanding of the subject.
 A PC based emulator would allow students to quickly develop and debug programs
 written in a simple assembly language on any modern desktop or laptop,
 and an MCS-51 port running on an 8052 would allow students to test programs
 in an actual circuit.
 EDE aims to bring together these components in order to provide an environment
 for using ELB816 as an educational tool.
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\begin_layout Section
Project Aims
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\begin_layout Itemize
Develop an assembler for the ELB816 assembly language.
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\begin_layout Itemize
Develop an emulated programmable micro-controller system based on the ELB816
 micro-processor architecture.
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\begin_layout Itemize
Develop a debugger that allows interactive debugging of programs running
 on the emulator.
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\begin_layout Section
Methodology
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\begin_layout Subsection
Assembler
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\begin_layout Description
Language: Python
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\begin_layout Description
Priority: First
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\begin_layout Standard
The assembler will be developed before anything else so that it can subsequently
 be used to assemble test programs during development of the emulator.
 
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\begin_layout Subsection
Emulator
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\begin_layout Description
Language: C
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\begin_layout Description
Priority: Second
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\begin_layout Standard
The emulator will use only standard libraries in order to ensure it is portable
 between compilers and platforms.
 Specifically GCC for x86 and Keil C51 for Intel MCS-51.
 The emulator will first be developed on Linux to facilitated rapid development.
 It will be ported to MCS-51 once it is complete
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\begin_layout Subsection
Debugger
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\begin_layout Description
Language: C/Python
\end_layout

\begin_layout Description
Priority: Second
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\begin_layout Standard
The debug interface will be developed along side the emulator.
 It will communicate with a a simple control function, built into the emulator,
 that will read commands using C's 
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stdio.h
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 library.
 This means that on Linux the commands will be issued using 
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STDIN
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 and on the MCS-51 version they will be issued over a serial interface.
 Python will be used to build a controller class for sending commands to
 and receiving data from the emulator.
 Python will also be used to build a text based user interface on top of
 this.
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