Mercurial > repos > blastem
diff zruntime.S @ 285:021aeb6df19b
Implement HALT (sort of tested)
author | Mike Pavone <pavone@retrodev.com> |
---|---|
date | Sat, 04 May 2013 16:23:28 -0700 |
parents | ed7098f717d7 |
children | 171f97e70d85 |
line wrap: on
line diff
--- a/zruntime.S Sat May 04 15:58:15 2013 -0700 +++ b/zruntime.S Sat May 04 16:23:28 2013 -0700 @@ -71,6 +71,17 @@ 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