source/src/vm/pc9801/membus.h

   1 /*
   2         NEC PC-9801 Emulator 'ePC-9801'
   3         NEC PC-9801E/F/M Emulator 'ePC-9801E'
   4         NEC PC-9801U Emulator 'ePC-9801U'
   5         NEC PC-9801VF Emulator 'ePC-9801VF'
   6         NEC PC-9801VM Emulator 'ePC-9801VM'
   7         NEC PC-9801VX Emulator 'ePC-9801VX'
   8         NEC PC-9801RA Emulator 'ePC-9801RA'
   9         NEC PC-98XA Emulator 'ePC-98XA'
  10         NEC PC-98XL Emulator 'ePC-98XL'
  11         NEC PC-98RL Emulator 'ePC-98RL'
  12         NEC PC-98DO Emulator 'ePC-98DO'
  13
  14         Author : Takeda.Toshiya
  15         Date   : 2017.06.22-
  16
  17         [ memory bus ]
  18 */
  19
  20 #ifndef _MEMBUS_H_
  21 #define _MEMBUS_H_
  22
  23 #include "../memory.h"
  24
  25 class DISPLAY;
  26
  27 #if defined(SUPPORT_32BIT_ADDRESS)
  28         #define RAM_SIZE        0x800000        // 8MB
  29 #elif defined(SUPPORT_24BIT_ADDRESS)
  30         #define RAM_SIZE        0x400000        // 4MB
  31 #else
  32         #define RAM_SIZE        0x100000        // 1MB
  33 #endif
  34
  35 //class csp_state_utils;
  36
  37 class MEMBUS : public MEMORY
  38 {
  39 private:
  40         DISPLAY *d_display;
  41
  42 //      csp_state_utils *state_entry;
  43         // RAM
  44         uint8_t ram[RAM_SIZE];
  45
  46         // BIOS/ITF
  47 #if !defined(SUPPORT_HIRESO)
  48         uint8_t bios[0x18000];
  49 #else
  50         uint8_t bios[0x10000];
  51 #endif
  52 #if defined(SUPPORT_BIOS_RAM)
  53 #if !defined(SUPPORT_HIRESO)
  54         uint8_t bios_ram[0x18000];
  55 #else
  56         uint8_t bios_ram[0x10000];
  57 #endif
  58 //      uint8_t bios_ram[sizeof(bios)];
  59         bool bios_ram_selected;
  60 #endif
  61 #if defined(SUPPORT_ITF_ROM)
  62         uint8_t itf[0x8000];
  63         bool itf_selected;
  64 #endif
  65         void update_bios();
  66
  67 #if !defined(SUPPORT_HIRESO)
  68         // EXT BIOS
  69 #if defined(_PC9801) || defined(_PC9801E)
  70         uint8_t fd_bios_2hd[0x1000];
  71         uint8_t fd_bios_2dd[0x1000];
  72 #endif
  73         uint8_t sound_bios[0x4000];
  74 //      uint8_t sound_bios_ram[0x4000];
  75         bool sound_bios_selected;
  76 //      bool sound_bios_ram_selected;
  77         void update_sound_bios();
  78 #if defined(SUPPORT_SASI_IF)
  79         uint8_t sasi_bios[0x1000];
  80         uint8_t sasi_bios_ram[0x1000];
  81         bool sasi_bios_selected;
  82         bool sasi_bios_ram_selected;
  83         void update_sasi_bios();
  84 #endif
  85 #if defined(SUPPORT_SCSI_IF)
  86         uint8_t scsi_bios[0x1000];
  87         uint8_t scsi_bios_ram[0x1000];
  88         bool scsi_bios_selected;
  89         bool scsi_bios_ram_selected;
  90         void update_scsi_bios();
  91 #endif
  92 #if defined(SUPPORT_IDE_IF)
  93         uint8_t ide_bios[0x4000];
  94 //      uint8_t ide_bios_ram[0x4000];
  95         bool ide_bios_selected;
  96 //      bool ide_bios_ram_selected;
  97         void update_ide_bios();
  98 #endif
  99
 100         // EMS
 101 #if defined(SUPPORT_NEC_EMS)
 102         uint8_t nec_ems[0x10000];
 103         bool nec_ems_selected;
 104         void update_nec_ems();
 105 #endif
 106 #endif
 107
 108 #if defined(SUPPORT_24BIT_ADDRESS) || defined(SUPPORT_32BIT_ADDRESS)
 109         uint8_t dma_access_ctrl;
 110         uint32_t window_80000h;
 111         uint32_t window_a0000h;
 112 #endif
 113
 114 public:
 115         MEMBUS(VM_TEMPLATE* parent_vm, EMU* parent_emu) : MEMORY(parent_vm, parent_emu)
 116         {
 117                 set_device_name(_T("Memory Bus"));
 118         }
 119         ~MEMBUS() {}
 120
 121         // common functions
 122         void initialize();
 123         void reset();
 124         void write_io8(uint32_t addr, uint32_t data);
 125         uint32_t read_io8(uint32_t addr);
 126 #if defined(SUPPORT_24BIT_ADDRESS) || defined(SUPPORT_32BIT_ADDRESS)
 127         uint32_t read_data8(uint32_t addr);
 128         void write_data8(uint32_t addr, uint32_t data);
 129         uint32_t read_dma_data8(uint32_t addr);
 130         void write_dma_data8(uint32_t addr, uint32_t data);
 131 #endif
 132         bool process_state(FILEIO* state_fio, bool loading);
 133
 134         // unique functions
 135         void set_context_display(DISPLAY* device)
 136         {
 137                 d_display = device;
 138         }
 139 };
 140
 141 #endif