source/src/vm/pc100/kanji.cpp

   1 /*
   2         NEC PC-100 Emulator 'ePC-100'
   3
   4         Author : Takeda.Toshiya
   5         Date   : 2008.07.14 -
   6
   7         [ kanji rom ]
   8 */
   9
  10 #include "kanji.h"
  11
  12 namespace PC100 {
  13
  14 void KANJI::initialize()
  15 {
  16         // init image
  17         memset(kanji, 0xff, sizeof(kanji));
  18
  19         // load kanji image
  20         FILEIO* fio = new FILEIO();
  21         if(fio->Fopen(create_local_path(_T("KANJI.ROM")), FILEIO_READ_BINARY)) {
  22                 fio->Fread(kanji, sizeof(kanji), 1);
  23                 fio->Fclose();
  24         }
  25         delete fio;
  26
  27         ptr = 0;
  28         strobe = false;
  29 }
  30
  31 void KANJI::write_io8(uint32_t addr, uint32_t data)
  32 {
  33         switch(addr & 0xff) {
  34         case 0x80:
  35                 ptr = (ptr & 0xff00) | data;
  36                 break;
  37         case 0x81:
  38                 ptr = (ptr & 0x00ff) | (data << 8);
  39                 break;
  40         case 0x84:
  41                 strobe = true;
  42                 break;
  43         case 0x86:
  44                 strobe = false;
  45                 break;
  46         }
  47 }
  48
  49 uint32_t KANJI::read_io8(uint32_t addr)
  50 {
  51         switch(addr & 0xff) {
  52         case 0x80:
  53                 return kanji[(ptr << 1) | 0];
  54         case 0x81:
  55                 return kanji[(ptr << 1) | 1];
  56         }
  57         return 0xff;
  58 }
  59
  60 #define STATE_VERSION   1
  61
  62 bool KANJI::process_state(FILEIO* state_fio, bool loading)
  63 {
  64         if(!state_fio->StateCheckUint32(STATE_VERSION)) {
  65                 return false;
  66         }
  67         if(!state_fio->StateCheckInt32(this_device_id)) {
  68                 return false;
  69         }
  70         state_fio->StateUint16(ptr);
  71         state_fio->StateBool(strobe);
  72         return true;
  73 }
  74
  75 }