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