Mercurial > hg > ede
annotate assembler/README @ 4:6b5453d7f336
spalling and gremmar
| author | james <jb302@eecs.qmul.ac.uk> |
|---|---|
| date | Sat, 07 Dec 2013 00:29:03 +0000 |
| parents | 82e82dda442b |
| children |
| rev | line source |
|---|---|
| jb302@1 | 1 version: 0.00001 |
| jb302@1 | 2 |
| jb302@1 | 3 NOTES: |
| jb302@1 | 4 |
| jb302@1 | 5 language.py: |
| jb302@4 | 6 -The entire language is defined in language.iset |
| jb302@1 | 7 |
| jb302@4 | 8 -language.tokenize() does not yet handle these data types: |
| jb302@1 | 9 - addr11 |
| jb302@1 | 10 - port_addr |
| jb302@1 | 11 - vect8 |
| jb302@1 | 12 |
| jb302@1 | 13 -16 bit hex strings must be in the format '0xXXXX' or '0xXXX' |
| jb302@1 | 14 or they will be interpreted an a 8 bit data type |
| jb302@1 | 15 |
| jb302@1 | 16 assembler.py: |
| jb302@1 | 17 |
| jb302@1 | 18 - first_pass() doesn't handle any directives apart from 'label:' |
| jb302@1 | 19 - labels must be defined before they are referenced or second_pass() breaks |
| jb302@1 | 20 - 16 bit address labels don't work unless the address is actually > 255 |
| jb302@1 | 21 otherwise tokenize returns them as 'rel8' and the symbol doesn't match |
| jb302@1 | 22 anything in iset |
| jb302@4 | 23 |