Crate rustasm6502[−][src]
Expand description
A MOS6502 assembler implemented as a macro.
Note: Due to limitations in Rust macros, there are two deviations from a typical 6502 assembly syntax:
- For absolute addressing mode, you need to use
abs
after the mnemonic (eg.lda abs 0xffff
). - For accumulator addressing mode, you need to use
a
after the mnemonic (eg.lsr a
).
Example
#[macro_use] #[no_link]
extern crate rustasm6502;
fn main() {
let machine_code = assemble6502! {
lda #0x00
ldx #0x00
ldy #0x00
txs
main:
adc 0xff // Zero-Page
adc abs 0x1234 // Absolute address 0x1234
ror a // Rotate the accumulator
beq main
end:
jmp end
};
assert_eq!(machine_code, [
0xA9, 0x00,
0xA2, 0x00,
0xA0, 0x00,
0x9A,
0x65, 0xff,
0x6D, 0x34, 0x12, // Little-endian
0x6A,
0xF0, (-8i8) as u8,
0x4C, 15, 0,
]);
}
Macros
Entry point for the macro-based MOS6502 assembler.