source/src/vm/pc98ha/memory.h

   1 /*
   2         NEC PC-98LT Emulator 'ePC-98LT'
   3         NEC PC-98HA Emulator 'eHANDY98'
   4
   5         Author : Takeda.Toshiya
   6         Date   : 2008.06.10 -
   7
   8         [ memory ]
   9 */
  10
  11 #ifndef _PC98LT_MEMORY_H_
  12 #define _PC98LT_MEMORY_H_
  13
  14 #include "../vm.h"
  15 #include "../../emu.h"
  16 #include "../device.h"
  17
  18 #define SIG_MEMORY_IR2  0
  19
  20 class PC98LT_MEMORY : public DEVICE
  21 {
  22 private:
  23         uint8_t* rbank[64];     // 1MB / 16KB
  24         uint8_t* wbank[64];
  25         uint8_t wdmy[0x4000];
  26         uint8_t rdmy[0x10000];
  27
  28         uint8_t ram[0xa0000];           // RAM 640KB
  29         uint8_t vram[0x8000];           // VRAM 32KB
  30
  31         uint8_t ipl[0x10000];           // IPL 64KB
  32         uint8_t kanji[0x40000];         // Kanji ROM 256KB
  33 #ifdef _PC98HA
  34         uint8_t learn[0x40000];         // Learn RAM 256KB
  35         uint8_t dic[0xc0000];           // Dictionary ROM 768KB
  36         uint8_t romdrv[0x100000];               // ROM Drive 1024KB
  37         uint8_t ramdrv[0x160000];               // RAM Drive 1408KB
  38         uint8_t ems[0x400000];          // EMS 4096KB
  39         uint8_t memcard[0x400000];      // Memory Card 4096KB
  40 #else
  41         uint8_t learn[0x10000];         // Learn RAM 64KB
  42         uint8_t dic[0x80000];           // Dictionary ROM 512KB
  43         uint8_t romdrv[0x80000];                // ROM Drive 512KB
  44 #endif
  45
  46         uint32_t learn_crc32;
  47 #ifdef _PC98HA
  48         uint32_t ramdrv_crc32;
  49         uint32_t memcard_crc32;
  50 #endif
  51
  52         void update_bank();
  53         uint8_t learn_bank, dic_bank, kanji_bank, romdrv_bank;
  54 #ifdef _PC98HA
  55         uint8_t ramdrv_bank, ramdrv_sel;
  56         uint8_t ems_bank[4];
  57 #endif
  58
  59 public:
  60         PC98LT_MEMORY(VM_TEMPLATE* parent_vm, EMU* parent_emu) : DEVICE(parent_vm, parent_emu)
  61         {
  62                 set_device_name(_T("Memory Bus"));
  63         }
  64         ~PC98LT_MEMORY() {}
  65
  66         // common functions
  67         void initialize();
  68         void release();
  69         void reset();
  70         void write_data8(uint32_t addr, uint32_t data);
  71         uint32_t read_data8(uint32_t addr);
  72         void write_io8(uint32_t addr, uint32_t data);
  73         uint32_t read_io8(uint32_t addr);
  74         bool process_state(FILEIO* state_fio, bool loading);
  75
  76         // unique functions
  77         uint8_t* get_vram()
  78         {
  79                 return vram;
  80         }
  81         void draw_screen();
  82 };
  83
  84 #endif
  85