From 3f1e17f9803faeab79f6dbf000b4855ba7bc894f Mon Sep 17 00:00:00 2001 From: Mike Pavone Date: Sat, 4 May 2013 16:23:28 -0700 Subject: Implement HALT (sort of tested) --- z80_to_x86.c | 9 ++++++++- zruntime.S | 11 +++++++++++ 2 files changed, 19 insertions(+), 1 deletion(-) 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); diff --git a/zruntime.S b/zruntime.S index 8b74b1b..c2ffe19 100644 --- a/zruntime.S +++ b/zruntime.S @@ -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 -- cgit v1.2.3