source/src/vm/x1/iobus.h

   1 /*
   2         SHARP X1 Emulator 'eX1'
   3         SHARP X1twin Emulator 'eX1twin'
   4         SHARP X1turbo Emulator 'eX1turbo'
   5         SHARP X1turboZ Emulator 'eX1turboZ'
   6
   7         Author : Takeda.Toshiya
   8         Date   : 2009.03.14-
   9
  10         [ 8bit i/o bus ]
  11 */
  12
  13 #ifndef _IOBUS_H_
  14 #define _IOBUS_H_
  15
  16 #include "../vm.h"
  17 #include "../../emu.h"
  18 #include "../device.h"
  19
  20 #define SIG_IOBUS_MODE  0
  21
  22 class IOBUS : public DEVICE
  23 {
  24 private:
  25         DEVICE *d_cpu, *d_display, *d_io;
  26
  27         // vram
  28 #ifdef _X1TURBO_FEATURE
  29         uint8_t vram[0x18000];
  30 #else
  31         uint8_t vram[0xc000];
  32 #endif
  33         bool vram_mode, signal;
  34
  35         uint8_t* vram_b;
  36         uint8_t* vram_r;
  37         uint8_t* vram_g;
  38
  39         uint8_t vdisp;
  40
  41         uint32_t prev_clock, vram_wait_index;
  42         bool column40;
  43 #ifdef _X1TURBO_FEATURE
  44         uint8_t crtc_regs[18];
  45         int crtc_ch;
  46         bool hireso;
  47 #ifdef _X1TURBOZ
  48         uint8_t zmode1;
  49         uint8_t zmode2;
  50 #endif
  51 #endif
  52         void write_port8(uint32_t addr, uint32_t data, bool is_dma, int* wait);
  53         uint32_t read_port8(uint32_t addr, bool is_dma, int* wait);
  54         int get_vram_wait();
  55
  56 public:
  57         IOBUS(VM* parent_vm, EMU* parent_emu) : DEVICE(parent_vm, parent_emu)
  58         {
  59                 set_device_name(_T("I/O Bus"));
  60         }
  61         ~IOBUS() {}
  62
  63         // common functions
  64         void initialize();
  65         void reset();
  66         void write_signal(int id, uint32_t data, uint32_t mask);
  67         void write_io8w(uint32_t addr, uint32_t data, int* wait);
  68         uint32_t read_io8w(uint32_t addr, int* wait);
  69         void write_dma_io8w(uint32_t addr, uint32_t data, int* wait);
  70         uint32_t read_dma_io8w(uint32_t addr, int* wait);
  71         void save_state(FILEIO* state_fio);
  72         bool load_state(FILEIO* state_fio);
  73
  74         // unique functions
  75         void set_context_cpu(DEVICE* device)
  76         {
  77                 d_cpu = device;
  78         }
  79         void set_context_display(DEVICE* device)
  80         {
  81                 d_display = device;
  82         }
  83         void set_context_io(DEVICE* device)
  84         {
  85                 d_io = device;
  86         }
  87         uint8_t* get_vram()
  88         {
  89                 return vram;
  90         }
  91 };
  92
  93 #endif
  94