COP 3404
Systems Software
Project 4
For this project you are to implement pass 2 of the assembler. Pass 1
should construct the symbol table, the addresses associated with each
instruction, addresses of each label. The input file will be in fixed
format:
Col 1-8 label optional
Col 9 blank
Col 10 + optional
Col 11-17 mnemonic
Col 18 blank
Col 19 #, @ ... optional
Col 20-29 label, register, ',',X optional ...
Col 30-31 blank
Col 32-80 comments optional
There may be blank lines in the source file. Your project should assemble
all of SIC/XE and be equivalent to sicasm. Extra credit will be awarded
for additional features currently not included in sicasm such as EQU,
CSECT, USE, etc. All test files will be entered in upper
case. Appropriate error conditions such as duplicately defined labels
or undefined labels. Invalid mnemonics should be ignored in maintaining
your addresses and your assembler should continue processing. Your should
anticipate project 4 as pass two, thus you might, in the design of pass
1, consider pass 2. This has been review from project 1. Pass 2 should
complete pass 1 creating the .obj file similar to the file created by
sicasm. Both the .obj file and the .lst file should be created using
appropriate names.
You may include any other files as you desire in your project folder.
Be sure to test the integrity of your shar (or any compressed folder).
