a 6502 assembler, written from scratch, in pure, compliant c

this is a 6502 assembler I made to test some programming patterns for a larger project it supports the full core 6502 instruction set, taken procedurally from the opcode table on https://www.masswerk.at/6502/6502_instruction_set.html

In this repo, you will find the tools (except an online html tag stripper on w3docs.org) I used to create this

you may build the project with cmake, and, as I did, test it with https://www.masswerk.at/6502/

program usage: /path/to/mini6502 <input file> <output file>

to use the emulator i linked you will need to hex dump the output. use format-hex on powershell

compilation only tested on msvc but should be 100% compliant

the syntax is as follows

• %, followed by a number, is a register. this is a convention i am testing. %0 is A, %1 is X, %2 is Y
• # precedes an immediate
• $ precedes a memory address
• :labelname for labels
• there are several directives: -- .byte puts a byte -- .dbyte puts a double-byte (2 bytes) -- .org for the organization -- .align to align with a padding byte (.align 0 512 aligns to 512 with a padding of 0x00) -- .defnum makes a pseudo-label with the value specified (.defnum foo 0x67) --