source/src/vm/tms9918a.h

   1 /*
   2         Skelton for retropc emulator
   3
   4         Origin : MAME TMS9928A Core
   5         Author : Takeda.Toshiya
   6         Date   : 2006.08.18 -
   7                  2007.07.21 -
   8
   9         [ TMS9918A ]
  10 */
  11
  12 #ifndef _TMS9918A_H_
  13 #define _TMS9918A_H_
  14
  15 #include "vm.h"
  16 #include "../emu.h"
  17 #include "device.h"
  18
  19 #define SIG_TMS9918A_SUPER_IMPOSE       0
  20
  21 class TMS9918A : public DEVICE
  22 {
  23 private:
  24         // output signals
  25         outputs_t outputs_irq;
  26
  27         uint8 vram[TMS9918A_VRAM_SIZE];
  28         uint8 screen[192][256];
  29         uint8 regs[8], status_reg, read_ahead, first_byte;
  30         uint16 vram_addr;
  31         bool latch, intstat;
  32         uint16 color_table, pattern_table, name_table;
  33         uint16 sprite_pattern, sprite_attrib;
  34         uint16 color_mask, pattern_mask;
  35 #ifdef TMS9918A_SUPER_IMPOSE
  36         bool now_super_impose;
  37 #endif
  38
  39         void set_intstat(bool val);
  40         void draw_mode0();
  41         void draw_mode1();
  42         void draw_mode2();
  43         void draw_mode12();
  44         void draw_mode3();
  45         void draw_mode23();
  46         void draw_modebogus();
  47         void draw_sprites();
  48
  49 public:
  50         TMS9918A(VM* parent_vm, EMU* parent_emu) : DEVICE(parent_vm, parent_emu)
  51         {
  52                 init_output_signals(&outputs_irq);
  53 #ifdef TMS9918A_SUPER_IMPOSE
  54                 now_super_impose = false;
  55 #endif
  56         }
  57         ~TMS9918A() {}
  58
  59         // common functions
  60         void initialize();
  61         void reset();
  62         void write_io8(uint32 addr, uint32 data);
  63         uint32 read_io8(uint32 addr);
  64 #ifdef TMS9918A_SUPER_IMPOSE
  65         void write_signal(int id, uint32 data, uint32 mask);
  66 #endif
  67         void event_vline(int v, int clock);
  68         void save_state(FILEIO* state_fio);
  69         bool load_state(FILEIO* state_fio);
  70
  71         // unique functions
  72         void set_context_irq(DEVICE* device, int id, uint32 mask)
  73         {
  74                 register_output_signal(&outputs_irq, device, id, mask);
  75         }
  76         void draw_screen();
  77 };
  78
  79 #endif
  80