git.mutantstargoat.com Git - mdlife/blob - src/z80.inc

   1         .equ Z80_MEMMODE,       0xa11000
   2         .equ Z80_BUSREQ,        0xa11100
   3         .equ Z80_RESET,         0xa11200
   4         .equ Z80_MEM,           0xa00000
   5
   6         .macro z80_grab
   7         move.w #0x100, Z80_BUSREQ
   8         .endm
   9
  10         .macro z80_grab_wait
  11         move.w #0x100, Z80_BUSREQ
  12 wait_z80_\@:
  13         btst #0, Z80_BUSREQ
  14         bne.s wait_z80_\@
  15         .endm
  16
  17         .macro z80_release
  18         move.w #0, Z80_BUSREQ
  19         .endm
  20
  21
  22 | vi:ft=gas68k: