source/src/vm/fmr50/timer.cpp

   1 /*
   2         FUJITSU FMR-50 Emulator 'eFMR-50'
   3         FUJITSU FMR-60 Emulator 'eFMR-60'
   4
   5         Author : Takeda.Toshiya
   6         Date   : 2008.04.30 -
   7
   8         [ timer ]
   9 */
  10
  11 #include "timer.h"
  12 #include "../i8259.h"
  13 #include "../msm58321.h"
  14 #include "../pcm1bit.h"
  15
  16 void TIMER::initialize()
  17 {
  18         free_run_counter = 0;
  19         intr_reg = rtc_data = 0;
  20         tmout0 = tmout1 = false;
  21 }
  22
  23 void TIMER::write_io8(uint32 addr, uint32 data)
  24 {
  25         switch(addr) {
  26         case 0x60:
  27                 if(data & 0x80) {
  28                         tmout0 = false;
  29                 }
  30                 intr_reg = data;
  31                 update_intr();
  32                 d_pcm->write_signal(SIG_PCM1BIT_ON, data, 4);
  33                 break;
  34         case 0x70:
  35                 d_rtc->write_signal(SIG_MSM58321_DATA, data, 0x0f);
  36                 break;
  37         case 0x80:
  38                 d_rtc->write_signal(SIG_MSM58321_CS, data, 0x80);
  39                 d_rtc->write_signal(SIG_MSM58321_READ, data, 0x04);
  40                 d_rtc->write_signal(SIG_MSM58321_WRITE, data, 0x02);
  41                 d_rtc->write_signal(SIG_MSM58321_ADDR_WRITE, data, 0x01);
  42                 break;
  43         }
  44 }
  45
  46 uint32 TIMER::read_io8(uint32 addr)
  47 {
  48         switch(addr) {
  49         case 0x26:
  50                 free_run_counter = (uint16)passed_usec(0);
  51                 return free_run_counter & 0xff;
  52         case 0x27:
  53                 return free_run_counter >> 8;
  54         case 0x60:
  55                 return (tmout0 ? 1 : 0) | (tmout1 ? 2 : 0) | ((intr_reg & 7) << 2) | 0xe0;
  56         case 0x70:
  57                 return rtc_data;
  58         }
  59         return 0xff;
  60 }
  61
  62 void TIMER::write_signal(int id, uint32 data, uint32 mask)
  63 {
  64         if(id == SIG_TIMER_CH0) {
  65                 if(data & mask) {
  66                         tmout0 = true;
  67                 }
  68                 update_intr();
  69         } else if(id == SIG_TIMER_CH1) {
  70                 tmout1 = ((data & mask) != 0);
  71                 update_intr();
  72         } else if(id == SIG_TIMER_RTC) {
  73                 rtc_data = (data & mask) | (rtc_data & ~mask);
  74         }
  75 }
  76
  77 void TIMER::update_intr()
  78 {
  79         if((tmout0 && (intr_reg & 1)) || (tmout1 && (intr_reg & 2))) {
  80                 d_pic->write_signal(SIG_I8259_CHIP0 | SIG_I8259_IR0, 1, 1);
  81         } else {
  82                 d_pic->write_signal(SIG_I8259_CHIP0 | SIG_I8259_IR0, 0, 1);
  83         }
  84 }
  85
  86 #define STATE_VERSION   1
  87
  88 void TIMER::save_state(FILEIO* state_fio)
  89 {
  90         state_fio->FputUint32(STATE_VERSION);
  91         state_fio->FputInt32(this_device_id);
  92
  93         state_fio->FputUint16(free_run_counter);
  94         state_fio->FputUint8(intr_reg);
  95         state_fio->FputUint8(rtc_data);
  96         state_fio->FputBool(tmout0);
  97         state_fio->FputBool(tmout1);
  98 }
  99
 100 bool TIMER::load_state(FILEIO* state_fio)
 101 {
 102         if(state_fio->FgetUint32() != STATE_VERSION) {
 103                 return false;
 104         }
 105         if(state_fio->FgetInt32() != this_device_id) {
 106                 return false;
 107         }
 108         free_run_counter = state_fio->FgetUint16();
 109         intr_reg = state_fio->FgetUint8();
 110         rtc_data = state_fio->FgetUint8();
 111         tmout0 = state_fio->FgetBool();
 112         tmout1 = state_fio->FgetBool();
 113         return true;
 114 }
 115