source/src/vm/fp1100/rampack.cpp

   1 /*
   2         CASIO FP-1100 Emulator 'eFP-1100'
   3
   4         Author : Takeda.Toshiya
   5         Date   : 2010.06.18-
   6
   7         [ ram pack ]
   8 */
   9
  10 #include "rampack.h"
  11
  12 namespace FP1100 {
  13
  14 void RAMPACK::initialize()
  15 {
  16         memset(ram, 0, sizeof(ram));
  17         modified = false;
  18
  19         FILEIO* fio = new FILEIO();
  20         if(fio->Fopen(create_local_path(_T("RAMPACK%d.BIN"), index), FILEIO_READ_BINARY)) {
  21                 fio->Fread(ram, sizeof(ram), 1);
  22                 fio->Fclose();
  23         }
  24         delete fio;
  25 }
  26
  27 void RAMPACK::release()
  28 {
  29         if(modified) {
  30                 FILEIO* fio = new FILEIO();
  31                 if(fio->Fopen(create_local_path(_T("RAMPACK%d.BIN"), index), FILEIO_WRITE_BINARY)) {
  32                         fio->Fwrite(ram, sizeof(ram), 1);
  33                         fio->Fclose();
  34                 }
  35                 delete fio;
  36         }
  37 }
  38
  39 void RAMPACK::write_io8(uint32_t addr, uint32_t data)
  40 {
  41         if(addr < 0x4000) {
  42                 if(ram[addr] != data) {
  43                         ram[addr] = data;
  44                         modified = true;
  45                 }
  46         }
  47 }
  48
  49 uint32_t RAMPACK::read_io8(uint32_t addr)
  50 {
  51         if(addr < 0x4000) {
  52                 return ram[addr];
  53         } else if(0xff00 <= addr && addr < 0xff80) {
  54                 return 0x01; // device id
  55         }
  56         return 0xff;
  57 }
  58
  59 #define STATE_VERSION   1
  60
  61 bool RAMPACK::process_state(FILEIO* state_fio, bool loading)
  62 {
  63         if(!state_fio->StateCheckUint32(STATE_VERSION)) {
  64                 return false;
  65         }
  66         if(!state_fio->StateCheckInt32(this_device_id)) {
  67                 return false;
  68         }
  69         state_fio->StateArray(ram, sizeof(ram), 1);
  70         state_fio->StateValue(modified);
  71         return true;
  72 }
  73
  74 }