src/tom.h

   1 //
   2 // TOM Header file
   3 //
   4
   5 #ifndef __TOM_H__
   6 #define __TOM_H__
   7
   8 #include "memory.h"
   9
  10 #define VIDEO_MODE_16BPP_CRY    0
  11 #define VIDEO_MODE_24BPP_RGB    1
  12 #define VIDEO_MODE_16BPP_DIRECT 2
  13 #define VIDEO_MODE_16BPP_RGB    3
  14
  15 // Virtual screen size stuff
  16
  17 // NB: This virtual width is for PWIDTH = 4
  18 //#define VIRTUAL_SCREEN_WIDTH            320
  19 //was:340, 330
  20 #define VIRTUAL_SCREEN_WIDTH            326
  21 #define VIRTUAL_SCREEN_HEIGHT_NTSC      240
  22 #define VIRTUAL_SCREEN_HEIGHT_PAL       256
  23
  24 // 68000 Interrupt bit positions (enabled at $F000E0)
  25
  26 enum { IRQ_VIDEO = 0, IRQ_GPU, IRQ_OPFLAG, IRQ_TIMER, IRQ_DSP };
  27
  28 void TOMInit(void);
  29 void TOMReset(void);
  30 void TOMDone(void);
  31
  32 uint8_t TOMReadByte(uint32_t offset, uint32_t who = UNKNOWN);
  33 uint16_t TOMReadWord(uint32_t offset, uint32_t who = UNKNOWN);
  34 void TOMWriteByte(uint32_t offset, uint8_t data, uint32_t who = UNKNOWN);
  35 void TOMWriteWord(uint32_t offset, uint16_t data, uint32_t who = UNKNOWN);
  36
  37 void TOMExecHalfline(uint16_t halfline, bool render);
  38 uint32_t TOMGetVideoModeWidth(void);
  39 uint32_t TOMGetVideoModeHeight(void);
  40 uint8_t TOMGetVideoMode(void);
  41 uint8_t * TOMGetRamPointer(void);
  42 uint16_t TOMGetHDB(void);
  43 uint16_t TOMGetVDB(void);
  44 uint16_t TOMGetHC(void);
  45 uint16_t TOMGetVP(void);
  46 uint16_t TOMGetMEMCON1(void);
  47 void TOMDumpIORegistersToLog(void);
  48
  49
  50 int TOMIRQEnabled(int irq);
  51 uint16_t TOMIRQControlReg(void);
  52 void TOMSetIRQLatch(int irq, int enabled);
  53 void TOMExecPIT(uint32_t cycles);
  54 void TOMSetPendingJERRYInt(void);
  55 void TOMSetPendingTimerInt(void);
  56 void TOMSetPendingObjectInt(void);
  57 void TOMSetPendingGPUInt(void);
  58 void TOMSetPendingVideoInt(void);
  59 void TOMResetPIT(void);
  60
  61 // Exported variables
  62
  63 extern uint32_t tomWidth;
  64 extern uint32_t tomHeight;
  65 extern uint8_t tomRam8[];
  66 extern uint32_t tomTimerPrescaler;
  67 extern uint32_t tomTimerDivider;
  68 extern int32_t tomTimerCounter;
  69
  70 extern uint32_t screenPitch;
  71 extern uint32_t * screenBuffer;
  72
  73 #endif  // __TOM_H__