source/src/vm/mz2500/timer.cpp

   1 /*
   2         SHARP MZ-2200 Emulator 'EmuZ-2200'
   3         SHARP MZ-2500 Emulator 'EmuZ-2500'
   4
   5         Author : Takeda.Toshiya
   6         Date   : 2006.12.03 -
   7
   8         [ timer ]
   9 */
  10
  11 #include "timer.h"
  12 #include "../i8253.h"
  13
  14 void TIMER::write_io8(uint32_t addr, uint32_t data)
  15 {
  16         switch(addr & 0xff) {
  17         case 0xf0:
  18         case 0xf1:
  19         case 0xf2:
  20         case 0xf3:
  21                 // input gate signal H->L->H to i8253 ch0 and ch1
  22                 d_pit->write_signal(SIG_I8253_GATE_0, 1, 1);
  23                 d_pit->write_signal(SIG_I8253_GATE_1, 1, 1);
  24                 d_pit->write_signal(SIG_I8253_GATE_0, 0, 1);
  25                 d_pit->write_signal(SIG_I8253_GATE_1, 0, 1);
  26                 d_pit->write_signal(SIG_I8253_GATE_0, 1, 1);
  27                 d_pit->write_signal(SIG_I8253_GATE_1, 1, 1);
  28                 break;
  29         }
  30 }
  31