Crate rustasm6502

A MOS6502 assembler implemented as a macro.

Note: Due to limitations in Rust macros, syntax for absolute addressing modes requires the use of abs after the mnemonic (eg. lda abs 0xffff).

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
        beq main
    end:
        jmp end
    };

    assert_eq!(machine_code, [
        0xA9, 0x00,
        0xA2, 0x00,
        0xA0, 0x00,
        0x9A,

        0x65, 0xff,
        0x6D, 0x34, 0x12,   // Little-endian
        0xF0, (-7i8) as u8,

        0x4C, 14, 0,
    ]);
}

Macros

asm_!	hidden
assemble6502!	Entry point for the macro-based MOS6502 assembler.
codelen!	Given an array of machine code (Bytes), returns its length. FIXME Don't go through an array hidden
ident_map!	A compile-time map from identifiers to arbitrary (heterogeneous) expressions hidden
lockstep_replace!	Replace elements of "arrays" of expressions with sorted replacements by seeking along a "positional array" containing n expressions, then replacing elements in the source array.
reloc!	Performs relocation of machine code based on given labels and relocations. Looks up label names in an ident_map. Expands to the relocated machine code.