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1.1 root 1: /*
1.1.1.4 root 2: Hatari - video.h
3:
4: This file is distributed under the GNU Public License, version 2 or at
5: your option any later version. Read the file gpl.txt for details.
1.1 root 6: */
7:
1.1.1.4 root 8: #ifndef HATARI_VIDEO_H
9: #define HATARI_VIDEO_H
10:
1.1.1.7 root 11: /*
12: All the following processor timings are based on a bog standard 8MHz 68000 as
13: found in all standard STs:
14:
15: Clock cycles per line (50Hz) : 512
16: NOPs per scan line (50Hz) : 128
17: Scan lines per VBL (50Hz) : 313 (64 at top,200 screen,49 bottom)
18:
19: Clock cycles per line (60Hz) : 508
20: NOPs per scan line (60Hz) : 127
21: Scan lines per VBL (60Hz) : 263
22:
23: Clock cycles per VBL (50Hz) : 160256
24: NOPs per VBL (50Hz) : 40064
25:
26: Pixels per clock cycle (low res) : 1
27: Pixels per clock cycle (med res) : 2
28: Pixels per clock cycle (high res) : 4
29: Pixels per NOP (low res) : 4
30: Pixels per NOP (med res) : 8
31: Pixels per NOP (high res) : 16
32: */
33:
34: /* Scan lines per frame */
35: #define SCANLINES_PER_FRAME_50HZ 313 /* Number of scan lines per frame in 50 Hz */
36: #define SCANLINES_PER_FRAME_60HZ 263 /* Number of scan lines per frame in 60 Hz */
1.1.1.8 root 37: #define SCANLINES_PER_FRAME_71HZ 501 /* could also be 500 ? */
1.1.1.12 root 38: #define MAX_SCANLINES_PER_FRAME SCANLINES_PER_FRAME_71HZ /* Max. number of scan lines per frame */
1.1.1.7 root 39:
40: /* Cycles per line */
41: #define CYCLES_PER_LINE_50HZ 512
42: #define CYCLES_PER_LINE_60HZ 508
1.1.1.8 root 43: #define CYCLES_PER_LINE_71HZ 224
1.1.1.7 root 44:
45: /* Vertical border/display enable/disable:
46: * Normal screen starts 63 lines in, top border is 29 lines */
1.1.1.10 root 47: #define VIDEO_START_HBL_50HZ 63 /* Usually the first line of the displayed screen in 50 Hz */
48: #define VIDEO_START_HBL_60HZ 34 /* The first line of the displayed screen in 60 Hz */
49: #define VIDEO_START_HBL_71HZ 34 /* FIXME: 34 is not verified */
50: #define FIRST_VISIBLE_HBL_50HZ 34 /* At this line we start rendering our screen in 50 Hz */
51: #define FIRST_VISIBLE_HBL_60HZ (34-29) /* At this line we start rendering our screen in 60 Hz (29 = 63-34) */
52: #define FIRST_VISIBLE_HBL_71HZ 34 /* FIXME: 34 is not verified */
1.1.1.7 root 53:
1.1.1.10 root 54: #define VIDEO_HEIGHT_HBL_COLOR 200 /* This is usually the height of the screen */
55: #define VIDEO_HEIGHT_HBL_MONO 400
1.1.1.8 root 56:
1.1.1.10 root 57: #define VIDEO_HEIGHT_BOTTOM_50HZ 47 /* number of lines in a 50 Hz bottom border */
58: #define VIDEO_HEIGHT_BOTTOM_60HZ 29 /* number of lines in a 60 Hz bottom border */
1.1.1.7 root 59:
1.1.1.10 root 60: #define VIDEO_END_HBL_50HZ ( VIDEO_START_HBL_50HZ + VIDEO_HEIGHT_HBL_COLOR ) /* 263 */
61: #define VIDEO_END_HBL_60HZ ( VIDEO_START_HBL_60HZ + VIDEO_HEIGHT_HBL_COLOR ) /* 234 */
1.1.1.8 root 62:
1.1.1.9 root 63: #define LINE_REMOVE_TOP_CYCLE_STF 504 /* switch to 60 Hz on line 33 should not occur after cycle 504 to remove top border */
64: /* switch to 50 Hz should occur after cycle 504 on line 33 */
65: #define LINE_REMOVE_BOTTOM_CYCLE_STF 504 /* same value than top border, but on line 262 (50 Hz) or 233 (60 Hz) */
66:
1.1.1.10 root 67: #define LINE_REMOVE_TOP_CYCLE_STE 500 /* on STE, switch can occur 4 cycles earlier than STF */
1.1.1.9 root 68: #define LINE_REMOVE_BOTTOM_CYCLE_STE 500
1.1.1.8 root 69:
70:
71: #define LINE_START_CYCLE_50 56
72: #define LINE_START_CYCLE_60 52
1.1.1.12 root 73: #define LINE_START_CYCLE_71 0
1.1.1.10 root 74: #define LINE_END_CYCLE_50 376 /* LINE_START_CYCLE_50 + 320 */
75: #define LINE_END_CYCLE_60 372 /* LINE_START_CYCLE_60 + 320 */
1.1.1.12 root 76: #define LINE_END_CYCLE_71 160
77: #define LINE_END_CYCLE_NO_RIGHT 460 /* 372 + 44*2 */
1.1.1.13 root 78: #define LINE_END_CYCLE_50_2 (LINE_END_CYCLE_50+44*2) /* 464, used in enchanted lands */
1.1.1.8 root 79: #define LINE_END_CYCLE_FULL 512 /* used in enchanted lands */
80: #define LINE_SCROLL_13_CYCLE_50 20 /* 13 pixels right "hardware" scrolling */
81: #define LINE_SCROLL_9_CYCLE_50 24 /* 9 pixels right "hardware" scrolling */
82: #define LINE_SCROLL_5_CYCLE_50 28 /* 5 pixels right "hardware" scrolling */
83: #define LINE_SCROLL_1_CYCLE_50 32 /* 1 pixels right "hardware" scrolling */
1.1.1.12 root 84: #define LINE_LEFT_MED_CYCLE_1 20 /* med res overscan, shifts display by 0 byte */
85: #define LINE_LEFT_MED_CYCLE_2 28 /* med res overscan, shifts display by 2 bytes */
86: #define LINE_EMPTY_CYCLE_71_STF 28 /* on STF switch to hi/lo will create an empty line */
87: #define LINE_EMPTY_CYCLE_71_STE (28+4) /* on STE switch to hi/lo will create an empty line */
1.1.1.7 root 88:
89: /* Bytes for opened left and right border: */
1.1.1.8 root 90: #define BORDERBYTES_NORMAL 160 /* size of a "normal" line */
91: #define BORDERBYTES_LEFT 26
1.1.1.13 root 92: #define BORDERBYTES_LEFT_2_STE 20
1.1.1.8 root 93: #define BORDERBYTES_RIGHT 44
94: #define BORDERBYTES_RIGHT_FULL 22
1.1.1.7 root 95:
96: /* Legacy defines: */
97: #define CYCLES_PER_FRAME (nScanlinesPerFrame*nCyclesPerLine) /* Cycles per VBL @ 50fps = 160256 */
98:
99:
1.1.1.11 root 100: #define VBL_VIDEO_CYCLE_OFFSET_STF 64 /* value of cycle counter when VBL signal is sent */
1.1.1.10 root 101: #define VBL_VIDEO_CYCLE_OFFSET_STE (64+4) /* 4 cycles difference on STE */
102:
1.1.1.11 root 103: #define HBL_VIDEO_CYCLE_OFFSET 0 /* cycles after end of current line (ie on every 512 cycles in 50 Hz) */
1.1.1.10 root 104: #define TIMERB_VIDEO_CYCLE_OFFSET 28 /* cycles after last displayed pixels : 376+28 in 50 Hz or 372+28 in 60 Hz */
105:
106: /* This is when ff8205/07/09 are reloaded with the content of ff8201/03 (on line 310 in 50 Hz) */
1.1.1.12 root 107: #define RESTART_VIDEO_COUNTER_CYCLE_STF ( (SCANLINES_PER_FRAME_50HZ-3) * CYCLES_PER_LINE_50HZ + 48 )
108: #define RESTART_VIDEO_COUNTER_CYCLE_STE ( (SCANLINES_PER_FRAME_50HZ-3) * CYCLES_PER_LINE_50HZ + 48 + 4 ) /* 4 cycles later than STF */
1.1.1.8 root 109:
1.1.1.10 root 110: /* anything above 4 uses automatic frameskip */
111: #define AUTO_FRAMESKIP_LIMIT 5
1.1.1.8 root 112:
113: extern int STRes;
114: extern int TTRes;
1.1.1.10 root 115: extern int nFrameSkips;
116: extern bool bUseHighRes;
1.1.1.8 root 117: extern int nVBLs;
118: extern int nHBL;
119: extern int nStartHBL;
1.1.1.10 root 120: extern int nEndHBL;
1.1 root 121: extern int OverscanMode;
1.1.1.14! root 122: extern Uint16 HBLPalettes[HBL_PALETTE_LINES];
1.1.1.5 root 123: extern Uint16 *pHBLPalettes;
1.1.1.14! root 124: extern Uint32 HBLPaletteMasks[HBL_PALETTE_MASKS];
1.1.1.6 root 125: extern Uint32 *pHBLPaletteMasks;
1.1.1.5 root 126: extern Uint32 VideoBase;
1.1.1.3 root 127: extern int nScreenRefreshRate;
1.1 root 128:
1.1.1.7 root 129: extern int nScanlinesPerFrame;
130: extern int nCyclesPerLine;
1.1.1.12 root 131:
1.1.1.10 root 132: extern int LineTimerBCycle;
1.1.1.12 root 133: extern int TimerBEventCountCycleStart;
134:
135: extern int LastCycleHblException;
1.1.1.7 root 136:
1.1.1.11 root 137: extern int HblJitterIndex;
138: extern int HblJitterArray[];
139: extern int HblJitterArrayPending[];
140: extern int VblJitterIndex;
141: extern int VblJitterArray[];
142: extern int VblJitterArrayPending[];
143:
1.1.1.7 root 144:
1.1.1.12 root 145: /*--------------------------------------------------------------*/
146: /* Functions prototypes */
147: /*--------------------------------------------------------------*/
148:
149: extern void Video_MemorySnapShot_Capture(bool bSave);
150:
151: extern void Video_Reset(void);
152: extern void Video_Reset_Glue(void);
153:
154: extern void Video_ConvertPosition( int FrameCycles , int *pHBL , int *pLineCycles );
155: extern void Video_GetPosition( int *pFrameCycles , int *pHBL , int *pLineCycles );
156: extern void Video_GetPosition_OnWriteAccess( int *pFrameCycles , int *pHBL , int *pLineCycles );
157: extern void Video_GetPosition_OnReadAccess( int *pFrameCycles , int *pHBL , int *pLineCycles );
158:
159: extern void Video_Sync_WriteByte(void);
160:
161: extern int Video_TimerB_GetPos( int LineNumber );
162:
163: extern void Video_InterruptHandler_HBL(void);
164: extern void Video_InterruptHandler_EndLine(void);
1.1.1.4 root 165:
1.1.1.12 root 166: extern void Video_SetScreenRasters(void);
167: extern void Video_GetTTRes(int *width, int *height, int *bpp);
1.1.1.13 root 168: extern bool Video_RenderTTScreen(void);
1.1.1.12 root 169:
170: extern void Video_AddInterruptTimerB ( int Pos );
171:
172: extern void Video_StartInterrupts ( int PendingCyclesOver );
173: extern void Video_InterruptHandler_VBL(void);
174:
175: extern void Video_ScreenBaseSTE_WriteByte(void);
1.1.1.8 root 176: extern void Video_ScreenCounter_ReadByte(void);
1.1.1.12 root 177: extern void Video_ScreenCounter_WriteByte(void);
1.1.1.5 root 178: extern void Video_Sync_ReadByte(void);
179: extern void Video_BaseLow_ReadByte(void);
180: extern void Video_LineWidth_ReadByte(void);
181: extern void Video_ShifterMode_ReadByte(void);
1.1.1.7 root 182: extern void Video_HorScroll_Read(void);
183: extern void Video_LineWidth_WriteByte(void);
1.1.1.5 root 184: extern void Video_Color0_WriteWord(void);
185: extern void Video_Color1_WriteWord(void);
186: extern void Video_Color2_WriteWord(void);
187: extern void Video_Color3_WriteWord(void);
188: extern void Video_Color4_WriteWord(void);
189: extern void Video_Color5_WriteWord(void);
190: extern void Video_Color6_WriteWord(void);
191: extern void Video_Color7_WriteWord(void);
192: extern void Video_Color8_WriteWord(void);
193: extern void Video_Color9_WriteWord(void);
194: extern void Video_Color10_WriteWord(void);
195: extern void Video_Color11_WriteWord(void);
196: extern void Video_Color12_WriteWord(void);
197: extern void Video_Color13_WriteWord(void);
198: extern void Video_Color14_WriteWord(void);
199: extern void Video_Color15_WriteWord(void);
200: extern void Video_ShifterMode_WriteByte(void);
1.1.1.10 root 201: extern void Video_HorScroll_Write_8264(void);
202: extern void Video_HorScroll_Write_8265(void);
1.1.1.7 root 203: extern void Video_HorScroll_Write(void);
1.1.1.8 root 204: extern void Video_TTShiftMode_WriteWord(void);
205: extern void Video_TTColorRegs_WriteWord(void);
206: extern void Video_TTColorSTRegs_WriteWord(void);
1.1.1.5 root 207:
1.1.1.4 root 208: #endif /* HATARI_VIDEO_H */
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