git.haldean.org x6502 / master opcode_handlers / load.h
master

Tree @master (Download .tar.gz)

load.h @masterraw · history · blame

case LDA_AB:
    arg1 = NEXT_BYTE(m);
    arg2 = NEXT_BYTE(m);
    m->ac = m->mem[mem_abs(arg1, arg2, 0)];
    set_flags(m, m->ac);
    break;

case LDA_ABX:
    arg1 = NEXT_BYTE(m);
    arg2 = NEXT_BYTE(m);
    m->ac = m->mem[mem_abs(arg1, arg2, m->x)];
    set_flags(m, m->ac);
    break;

case LDA_ABY:
    arg1 = NEXT_BYTE(m);
    arg2 = NEXT_BYTE(m);
    m->ac = m->mem[mem_abs(arg1, arg2, m->y)];
    set_flags(m, m->ac);
    break;

case LDA_IMM:
    m->ac = NEXT_BYTE(m);
    set_flags(m, m->ac);
    break;

case LDA_INX:
    m->ac = m->mem[mem_indexed_indirect(m, NEXT_BYTE(m), m->x)];
    set_flags(m, m->ac);
    break;

case LDA_INY:
    m->ac = m->mem[mem_indirect_index(m, NEXT_BYTE(m), m->y)];
    set_flags(m, m->ac);
    break;

case LDA_ZP:
    m->ac = m->mem[NEXT_BYTE(m)];
    set_flags(m, m->ac);
    break;

case LDA_ZPX:
    m->ac = m->mem[NEXT_BYTE(m) + m->x];
    set_flags(m, m->ac);
    break;

case LDX_AB:
    arg1 = NEXT_BYTE(m);
    arg2 = NEXT_BYTE(m);
    m->x = m->mem[mem_abs(arg1, arg2, 0)];
    set_flags(m, m->x);
    break;

case LDX_ABY:
    arg1 = NEXT_BYTE(m);
    arg2 = NEXT_BYTE(m);
    m->x = m->mem[mem_abs(arg1, arg2, m->y)];
    set_flags(m, m->x);
    break;

case LDX_IMM:
    m->x = NEXT_BYTE(m);
    set_flags(m, m->x);
    break;

case LDX_ZP:
    m->x = m->mem[NEXT_BYTE(m)];
    set_flags(m, m->x);
    break;

case LDX_ZPY:
    m->x = m->mem[NEXT_BYTE(m) + m->y];
    set_flags(m, m->x);
    break;

case LDY_AB:
    arg1 = NEXT_BYTE(m);
    arg2 = NEXT_BYTE(m);
    m->y = m->mem[mem_abs(arg1, arg2, 0)];
    set_flags(m, m->y);
    break;

case LDY_ABX:
    arg1 = NEXT_BYTE(m);
    arg2 = NEXT_BYTE(m);
    m->y = m->mem[mem_abs(arg1, arg2, m->x)];
    set_flags(m, m->y);
    break;

case LDY_IMM:
    m->y = NEXT_BYTE(m);
    set_flags(m, m->y);
    break;

case LDY_ZP:
    m->y = m->mem[NEXT_BYTE(m)];
    set_flags(m, m->y);
    break;

case LDY_ZPX:
    m->y = m->mem[NEXT_BYTE(m) + m->x];
    set_flags(m, m->y);
    break;