source/src/vm/fm16beta/cmos.cpp

   1 /*
   2         FUJITSU FM16beta Emulator 'eFM16beta'
   3
   4         Author : Takeda.Toshiya
   5         Date   : 2017.12.30-
   6
   7         [ cmos ]
   8 */
   9
  10 #include "./cmos.h"
  11
  12 namespace FM16BETA {
  13
  14 void CMOS::initialize()
  15 {
  16         // load cmos image
  17         memset(cmos, 0, sizeof(cmos));
  18         modified = false;
  19
  20         FILEIO* fio = new FILEIO();
  21         if(fio->Fopen(create_local_path(_T("CMOS.BIN")), FILEIO_READ_BINARY)) {
  22                 fio->Fread(cmos, sizeof(cmos), 1);
  23                 fio->Fclose();
  24         }
  25         delete fio;
  26 }
  27
  28 void CMOS::release()
  29 {
  30         if(modified) {
  31                 FILEIO* fio = new FILEIO();
  32                 if(fio->Fopen(create_local_path(_T("CMOS.BIN")), FILEIO_WRITE_BINARY)) {
  33                         fio->Fwrite(cmos, sizeof(cmos), 1);
  34                         fio->Fclose();
  35                 }
  36                 delete fio;
  37         }
  38 }
  39
  40 void CMOS::write_io8(uint32_t addr, uint32_t data)
  41 {
  42         if(cmos[addr & 0x7ff] != data) {
  43                 cmos[addr & 0x7ff] = data;
  44                 modified = true;
  45         }
  46 }
  47
  48 uint32_t CMOS::read_io8(uint32_t addr)
  49 {
  50         return cmos[addr & 0x7ff];
  51 }
  52
  53 #define STATE_VERSION   1
  54
  55 bool CMOS::process_state(FILEIO* state_fio, bool loading)
  56 {
  57         if(!state_fio->StateCheckUint32(STATE_VERSION)) {
  58                 return false;
  59         }
  60         if(!state_fio->StateCheckInt32(this_device_id)) {
  61                 return false;
  62         }
  63         state_fio->StateArray(cmos, sizeof(cmos), 1);
  64         state_fio->StateValue(modified);
  65         return true;
  66 }
  67
  68 }