source/src/vm/fmtowns/planevram.h

   1 #pragma once
   2
   3 #include "device.h"
   4 #include "../../common.h"
   5 #include "towns_common.h"
   6
   7 namespace FMTOWNS {
   8 class TOWNS_VRAM;
   9
  10 class PLANEVRAM : public DEVICE
  11 {
  12 protected:
  13         DEVICE* d_crtc;
  14         DEVICE* d_sprite;
  15         TOWNS_VRAM* d_vram;
  16
  17         uint8_t mix_reg;             // MMIO 000CH:FF80H
  18         uint8_t r50_readplane;       // MMIO 000CH:FF81H : BIT 7 and 6.
  19         uint8_t r50_ramsel;          // MMIO 000CH:FF81H : BIT 3 to 0.
  20         uint32_t r50_gvramsel;        // MMIO 000CH:FF83H : bit4 (and 3).
  21
  22 public:
  23         PLANEVRAM(VM_TEMPLATE* parent_vm, EMU_TEMPLATE*parent_emu) : DEVICE(parent_vm, parent_emu)
  24         {
  25                 d_crtc = NULL;
  26                 d_sprite = NULL;
  27                 d_vram = NULL;
  28         }
  29
  30         void initialize();
  31         void reset();
  32
  33         virtual uint32_t __FASTCALL read_memory_mapped_io8(uint32_t addr);
  34         virtual void __FASTCALL write_memory_mapped_io8(uint32_t addr, uint32_t data);
  35
  36         virtual uint32_t __FASTCALL read_io8(uint32_t addr);
  37         virtual void __FASTCALL write_io8(uint32_t addr, uint32_t data);
  38
  39         virtual bool process_state(FILEIO* state_fio, bool loading);
  40
  41         // unique functions
  42         void set_context_crtc(DEVICE* dev)
  43         {
  44                 d_crtc = dev;
  45         }
  46         void set_context_sprite(DEVICE* dev)
  47         {
  48                 d_sprite = dev;
  49         }
  50         void set_context_vram(TOWNS_VRAM* dev)
  51         {
  52                 d_vram = dev;
  53         }
  54
  55 };
  56 }