>Cpu_2 

Last Edit: April 19, 2022, 3:16 a.m.

Assembler

This page will go over the program assembler for my cpu design in more detail.

/Assembler features:

• Comments
• Comments are everything after on each line
• Variables
• Variables are words that start wtih a $
• If alone on a line (in which case the address is defined sequentially at the end of the program space)
• If followed with a number that line will be the memory address for that variable.
• Can be used as operands for any instruction.
• Labels
• Labels are words that start with a :
• Can be used as operands for any instruction.
• Instructions
• Instructions are the first non-whitespace non-reserved (not $ or :) words on a line.
• Operands are listed on the same line separated by whitespace.

Output is the verilog .mem format with one address per line starting at address 0 and increasing by one each line.

It also outputs a .dbg file which has extra columns for the memory address, memory value, where each instruction ended up, and where the labels are used.