diff options
| author | Mike Pavone <pavone@retrodev.com> | 2013-05-04 16:23:28 -0700 |
|---|---|---|
| committer | Mike Pavone <pavone@retrodev.com> | 2013-05-04 16:23:28 -0700 |
| commit | 3f1e17f9803faeab79f6dbf000b4855ba7bc894f (patch) | |
| tree | d8554c519b335be3fac67ae02d7eccc9fb55f210 | |
| parent | 703129f573b4e3b84df96612bb26db672617a8bc (diff) | |
Implement HALT (sort of tested)
| -rw-r--r-- | z80_to_x86.c | 9 | ||||
| -rw-r--r-- | zruntime.S | 11 |
2 files changed, 19 insertions, 1 deletions
diff --git a/z80_to_x86.c b/z80_to_x86.c index c30ac8f..7314afc 100644 --- a/z80_to_x86.c +++ b/z80_to_x86.c @@ -35,6 +35,7 @@ void z80_handle_cycle_limit_int(); void z80_retrans_stub(); void z80_io_read(); void z80_io_write(); +void z80_halt(); uint8_t z80_size(z80inst * inst) { @@ -898,7 +899,13 @@ uint8_t * translate_z80inst(z80inst * inst, uint8_t * dst, z80_context * context dst = zcycles(dst, 4 * inst->immed); } break; - //case Z80_HALT: + case Z80_HALT: + dst = zcycles(dst, 4); + dst = mov_ir(dst, address, SCRATCH1, SZ_W); + uint8_t * call_inst = dst; + dst = call(dst, (uint8_t *)z80_halt); + dst = jmp(dst, call_inst); + break; case Z80_DI: dst = zcycles(dst, 4); dst = mov_irdisp8(dst, 0, CONTEXT, offsetof(z80_context, iff1), SZ_B); @@ -71,6 +71,17 @@ z80_do_sync: zskip_sync: ret + .global z80_halt +z80_halt: + mov %edi, %r14d + sub %ebp, %r14d + and $0xFFFFFFFC, %r14d + add %r14d, %ebp + cmp %edi, %ebp + jnb z80_handle_cycle_limit_int + add $4, %ebp + jmp z80_handle_cycle_limit_int + .global z80_read_byte z80_read_byte: call z_inccycles |