--- hatari/src/includes/video.h 2019/04/01 07:11:33 1.1.1.4 +++ hatari/src/includes/video.h 2019/04/01 07:14:14 1.1.1.9 @@ -8,43 +8,159 @@ #ifndef HATARI_VIDEO_H #define HATARI_VIDEO_H -#include +/* + All the following processor timings are based on a bog standard 8MHz 68000 as + found in all standard STs: -#define BORDERMASK_NONE 0x0000 /* Borders masks */ -#define BORDERMASK_TOP 0x0001 -#define BORDERMASK_BOTTOM 0x0002 -#define BORDERMASK_LEFT 0x0004 -#define BORDERMASK_RIGHT 0x0008 + Clock cycles per line (50Hz) : 512 + NOPs per scan line (50Hz) : 128 + Scan lines per VBL (50Hz) : 313 (64 at top,200 screen,49 bottom) -extern long VideoAddress; -extern unsigned char VideoSyncByte,VideoShifterByte; + Clock cycles per line (60Hz) : 508 + NOPs per scan line (60Hz) : 127 + Scan lines per VBL (60Hz) : 263 + + Clock cycles per VBL (50Hz) : 160256 + NOPs per VBL (50Hz) : 40064 + + Pixels per clock cycle (low res) : 1 + Pixels per clock cycle (med res) : 2 + Pixels per clock cycle (high res) : 4 + Pixels per NOP (low res) : 4 + Pixels per NOP (med res) : 8 + Pixels per NOP (high res) : 16 +*/ + +/* Scan lines per frame */ +#define SCANLINES_PER_FRAME_50HZ 313 /* Number of scan lines per frame in 50 Hz */ +#define SCANLINES_PER_FRAME_60HZ 263 /* Number of scan lines per frame in 60 Hz */ +#define SCANLINES_PER_FRAME_71HZ 501 /* could also be 500 ? */ +#define MAX_SCANLINES_PER_FRAME 313 /* Max. number of scan lines per frame */ + +/* Cycles per line */ +#define CYCLES_PER_LINE_50HZ 512 +#define CYCLES_PER_LINE_60HZ 508 +#define CYCLES_PER_LINE_71HZ 224 + +/* Vertical border/display enable/disable: + * Normal screen starts 63 lines in, top border is 29 lines */ +#define SCREEN_START_HBL_50HZ 63 /* Usually the first line of the displayed screen in 50 Hz */ +#define SCREEN_START_HBL_60HZ 34 /* The first line of the displayed screen in 60 Hz */ +#define SCREEN_START_HBL_71HZ 34 /* FIXME: 34 is not verified */ +#define FIRST_VISIBLE_HBL_50HZ 34 /* At this line we start rendering our screen in 50 Hz */ +#define FIRST_VISIBLE_HBL_60HZ (34-29) /* At this line we start rendering our screen in 60 Hz (29 = 63-34) */ +#define FIRST_VISIBLE_HBL_71HZ 34 /* FIXME: 34 is not verified */ + +#define SCREEN_HEIGHT_HBL_COLOR 200 /* This is usually the height of the screen */ +#define SCREEN_HEIGHT_HBL_MONO 400 + +#define SCREEN_END_HBL_50HZ ( SCREEN_START_HBL_50HZ + SCREEN_HEIGHT_HBL_COLOR ) /* 263 */ +#define SCREEN_END_HBL_60HZ ( SCREEN_START_HBL_60HZ + SCREEN_HEIGHT_HBL_COLOR ) /* 234 */ + +/* FIXME: SCREEN_START_CYCLE should rather be 52 or so, but this breaks a lot of other things at the moment... */ +#define SCREEN_START_CYCLE 56 /* Cycle first normal pixel appears on */ + +#define LINE_REMOVE_TOP_CYCLE_STF 504 /* switch to 60 Hz on line 33 should not occur after cycle 504 to remove top border */ + /* switch to 50 Hz should occur after cycle 504 on line 33 */ +#define LINE_REMOVE_BOTTOM_CYCLE_STF 504 /* same value than top border, but on line 262 (50 Hz) or 233 (60 Hz) */ + +#define LINE_REMOVE_TOP_CYCLE_STE 500 /* on STE, switch can occur 4 cycles earlier */ +#define LINE_REMOVE_BOTTOM_CYCLE_STE 500 + + +#define LINE_START_CYCLE_50 56 +#define LINE_START_CYCLE_60 52 +#define LINE_START_CYCLE_70 0 +#define LINE_END_CYCLE_50 376 +#define LINE_END_CYCLE_60 372 +#define LINE_END_CYCLE_70 160 +#define LINE_END_CYCLE_NO_RIGHT 460 +#define LINE_END_CYCLE_50_2 (LINE_END_CYCLE_50+44*2) /* used in enchanted lands */ +#define LINE_END_CYCLE_FULL 512 /* used in enchanted lands */ +#define LINE_SCROLL_13_CYCLE_50 20 /* 13 pixels right "hardware" scrolling */ +#define LINE_SCROLL_9_CYCLE_50 24 /* 9 pixels right "hardware" scrolling */ +#define LINE_SCROLL_5_CYCLE_50 28 /* 5 pixels right "hardware" scrolling */ +#define LINE_SCROLL_1_CYCLE_50 32 /* 1 pixels right "hardware" scrolling */ +#define LINE_LEFT_MID_CYCLE_1 20 /* mid res overscan, shifts display by 0 byte */ +#define LINE_LEFT_MID_CYCLE_2 28 /* mid res overscan, shifts display by 2 bytes */ +#define LINE_EMPTY_CYCLE_70 28 /* switch to hi/lo will create an empty line */ + +/* Bytes for opened left and right border: */ +#define BORDERBYTES_NORMAL 160 /* size of a "normal" line */ +#define BORDERBYTES_LEFT 26 +#define BORDERBYTES_RIGHT 44 +#define BORDERBYTES_RIGHT_FULL 22 + +/* Legacy defines: */ +#define CYCLES_PER_FRAME (nScanlinesPerFrame*nCyclesPerLine) /* Cycles per VBL @ 50fps = 160256 */ + + +#define VBL_VIDEO_CYCLE_OFFSET (60+4) +#define HBL_VIDEO_CYCLE_OFFSET (12-12) /* cycles after end of current line */ +#define TIMERB_VIDEO_CYCLE_OFFSET (96+12) /* cycles before end of current line (28 cycles after display off) */ +#define RESTART_VIDEO_COUNTER_CYCLE ( (MAX_SCANLINES_PER_FRAME-3) * CYCLES_PER_LINE_50HZ + 48 ) + + +extern int STRes; +extern int TTRes; +extern BOOL bUseSTShifter; extern BOOL bUseHighRes; -extern int nVBLs,nHBL; -extern int nStartHBL,nEndHBL; +extern int nVBLs; +extern int nHBL; +extern int nStartHBL; extern int OverscanMode; -extern unsigned short int HBLPalettes[(NUM_VISIBLE_LINES+1)*16]; -extern unsigned long HBLPaletteMasks[NUM_VISIBLE_LINES+1]; -extern unsigned short int *pHBLPalettes; -extern unsigned long *pHBLPaletteMasks; -extern unsigned long VideoBase; -extern unsigned long VideoRaster; -extern int VBLCounter; +extern Uint16 HBLPalettes[]; +extern Uint16 *pHBLPalettes; +extern Uint32 HBLPaletteMasks[]; +extern Uint32 *pHBLPaletteMasks; +extern Uint32 VideoBase; extern int nScreenRefreshRate; +extern int nScanlinesPerFrame; +extern int nCyclesPerLine; + + +extern void Video_SetSystemTimings(void); extern void Video_Reset(void); extern void Video_MemorySnapShot_Capture(BOOL bSave); -extern void Video_ClearOnVBL(void); -extern void Video_CalculateAddress(void); -extern unsigned long Video_ReadAddress(void); +extern void Video_GetTTRes(int *width, int *height, int *bpp); +extern void Video_StartInterrupts(void); extern void Video_InterruptHandler_VBL(void); extern void Video_InterruptHandler_EndLine(void); extern void Video_InterruptHandler_HBL(void); -extern void Video_WriteToShifter(Uint8 Byte); -extern void Video_WriteToSync(Uint8 Byte); -extern void Video_StartHBL(void); -extern void Video_CopyVDIScreen(void); -extern void Video_EndHBL(void); extern void Video_SetScreenRasters(void); -extern void Video_SetHBLPaletteMaskPointers(void); + +extern void Video_ScreenCounter_ReadByte(void); +extern void Video_Sync_ReadByte(void); +extern void Video_BaseLow_ReadByte(void); +extern void Video_LineWidth_ReadByte(void); +extern void Video_ShifterMode_ReadByte(void); +extern void Video_HorScroll_Read(void); + +extern void Video_ScreenBaseSTE_WriteByte(void); +extern void Video_ScreenCounter_WriteByte(void); +extern void Video_Sync_WriteByte(void); +extern void Video_LineWidth_WriteByte(void); +extern void Video_Color0_WriteWord(void); +extern void Video_Color1_WriteWord(void); +extern void Video_Color2_WriteWord(void); +extern void Video_Color3_WriteWord(void); +extern void Video_Color4_WriteWord(void); +extern void Video_Color5_WriteWord(void); +extern void Video_Color6_WriteWord(void); +extern void Video_Color7_WriteWord(void); +extern void Video_Color8_WriteWord(void); +extern void Video_Color9_WriteWord(void); +extern void Video_Color10_WriteWord(void); +extern void Video_Color11_WriteWord(void); +extern void Video_Color12_WriteWord(void); +extern void Video_Color13_WriteWord(void); +extern void Video_Color14_WriteWord(void); +extern void Video_Color15_WriteWord(void); +extern void Video_ShifterMode_WriteByte(void); +extern void Video_HorScroll_Write(void); +extern void Video_TTShiftMode_WriteWord(void); +extern void Video_TTColorRegs_WriteWord(void); +extern void Video_TTColorSTRegs_WriteWord(void); #endif /* HATARI_VIDEO_H */