source/src/vm/pc98ha/note.cpp

   1 /*
   2         NEC PC-98LT Emulator 'ePC-98LT'
   3         NEC PC-98HA Emulator 'eHANDY98'
   4
   5         Author : Takeda.Toshiya
   6         Date   : 2008.08.14 -
   7
   8         [ note i/o ]
   9 */
  10
  11 #include "note.h"
  12 #include "../i8259.h"
  13
  14 namespace PC98HA {
  15
  16 void NOTE::initialize()
  17 {
  18         ch = 0;
  19         memset(regs, 0, sizeof(regs));
  20 }
  21
  22 void NOTE::write_io8(uint32_t addr, uint32_t data)
  23 {
  24         switch(addr & 0xffff) {
  25         case 0x810:
  26                 regs[ch & 0x0f] = data;
  27                 break;
  28         case 0x812:
  29                 ch = data;
  30                 break;
  31         case 0x4810:
  32                 // unknown
  33                 break;
  34         case 0x6e8e:
  35                 // modem control 1
  36                 break;
  37         case 0x7e8e:
  38                 // modem control 2
  39                 break;
  40         case 0x8810:
  41                 // power status
  42                 // bit5 = 1: unknown
  43                 // bit2 = 1: stanby
  44                 // bit0 = 1: power off
  45 //              d_pic->write_signal(SIG_I8259_IR5, data, 2);
  46                 break;
  47         case 0xc810:
  48                 // unknown
  49                 break;
  50         }
  51 }
  52
  53 uint32_t NOTE::read_io8(uint32_t addr)
  54 {
  55         switch(addr & 0xffff) {
  56         case 0x810:
  57                 return regs[ch & 0x0f];
  58         case 0x812:
  59                 return ch;
  60         case 0xf8e:
  61                 // pc card slot
  62                 return 0xe;     // 4 if no memcard
  63         case 0x5e8e:
  64                 // pc card slot ???
  65                 return 0x46;    // 0x40 if no memcard
  66         case 0x8810:
  67                 // bit7 = 1: docking station
  68                 // bit6 = 1: ac power supply
  69                 // bit4 = 1: alarm
  70                 // bit3 = 1: unknown
  71                 // bit2 = 1: li.battery low
  72                 // bit1 = 1: battery low
  73                 // bit0 = 1: power off
  74 #ifdef DOCKING_STATION
  75                 return 0xc0;
  76 #else
  77                 return 0x40;
  78 #endif
  79         }
  80         return 0xff;
  81 }
  82
  83 #define STATE_VERSION   1
  84
  85 bool NOTE::process_state(FILEIO* state_fio, bool loading)
  86 {
  87         if(!state_fio->StateCheckUint32(STATE_VERSION)) {
  88                 return false;
  89         }
  90         if(!state_fio->StateCheckInt32(this_device_id)) {
  91                 return false;
  92         }
  93         state_fio->StateValue(ch);
  94         state_fio->StateArray(regs, sizeof(regs), 1);
  95         return true;
  96 }
  97
  98 }
  99