1 /***************************************************************************
2 * Copyright (C) 2010 by Blade_Arma *
4 * This program is free software; you can redistribute it and/or modify *
5 * it under the terms of the GNU General Public License as published by *
6 * the Free Software Foundation; either version 2 of the License, or *
7 * (at your option) any later version. *
9 * This program is distributed in the hope that it will be useful, *
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
12 * GNU General Public License for more details. *
14 * You should have received a copy of the GNU General Public License *
15 * along with this program; if not, write to the *
16 * Free Software Foundation, Inc., *
17 * 51 Franklin Street, Fifth Floor, Boston, MA 02111-1307 USA. *
18 ***************************************************************************/
21 * Internal PSX counters.
24 #include "psxcounters.h"
26 /******************************************************************************/
31 u32 rate, irq, counterState, irqState;
32 u32 cycle, cycleStart;
37 Rc0Gate = 0x0001, // 0 not implemented
38 Rc1Gate = 0x0001, // 0 not implemented
39 Rc2Disable = 0x0001, // 0 partially implemented
40 RcUnknown1 = 0x0002, // 1 ?
41 RcUnknown2 = 0x0004, // 2 ?
42 RcCountToTarget = 0x0008, // 3
43 RcIrqOnTarget = 0x0010, // 4
44 RcIrqOnOverflow = 0x0020, // 5
45 RcIrqRegenerate = 0x0040, // 6
46 RcUnknown7 = 0x0080, // 7 ?
47 Rc0PixelClock = 0x0100, // 8 fake implementation
48 Rc1HSyncClock = 0x0100, // 8
49 Rc2Unknown8 = 0x0100, // 8 ?
50 Rc0Unknown9 = 0x0200, // 9 ?
51 Rc1Unknown9 = 0x0200, // 9 ?
52 Rc2OneEighthClock = 0x0200, // 9
53 RcUnknown10 = 0x0400, // 10 ?
54 RcCountEqTarget = 0x0800, // 11
55 RcOverflow = 0x1000, // 12
56 RcUnknown13 = 0x2000, // 13 ? (always zero)
57 RcUnknown14 = 0x4000, // 14 ? (always zero)
58 RcUnknown15 = 0x8000, // 15 ? (always zero)
61 #define CounterQuantity ( 4 )
62 //static const u32 CounterQuantity = 4;
64 static const u32 CountToOverflow = 0;
65 static const u32 CountToTarget = 1;
67 static const u32 FrameRate[] = { 60, 50 };
68 static const u32 VBlankStart[] = { 240, 256 };
69 static const u32 HSyncTotal[] = { 262, 312 };
70 static const u32 SpuUpdInterval[] = { 23, 22 };
72 static const s32 VerboseLevel = 0;
74 /******************************************************************************/
76 static Rcnt rcnts[ CounterQuantity ];
78 static u32 hSyncCount = 0;
79 static u32 spuSyncCount = 0;
81 u32 psxNextCounter = 0, psxNextsCounter = 0;
83 /******************************************************************************/
86 void setIrq( u32 irq )
88 psxHu32ref(0x1070) |= SWAPu32(irq);
92 void verboseLog( s32 level, const char *str, ... )
94 if( level <= VerboseLevel )
100 vsprintf( buf, str, va );
108 /******************************************************************************/
111 void _psxRcntWcount( u32 index, u32 value )
115 verboseLog( 1, "[RCNT %i] wcount > 0xffff: %x\n", index, value );
119 rcnts[index].cycleStart = psxRegs.cycle;
120 rcnts[index].cycleStart -= value * rcnts[index].rate;
123 if( value < rcnts[index].target )
125 rcnts[index].cycle = rcnts[index].target * rcnts[index].rate;
126 rcnts[index].counterState = CountToTarget;
130 rcnts[index].cycle = 0xffff * rcnts[index].rate;
131 rcnts[index].counterState = CountToOverflow;
136 u32 _psxRcntRcount( u32 index )
140 count = psxRegs.cycle;
141 count -= rcnts[index].cycleStart;
142 count /= rcnts[index].rate;
146 verboseLog( 1, "[RCNT %i] rcount > 0xffff: %x\n", index, count );
153 /******************************************************************************/
161 psxNextsCounter = psxRegs.cycle;
162 psxNextCounter = 0x7fffffff;
164 for( i = 0; i < CounterQuantity; ++i )
166 countToUpdate = rcnts[i].cycle - (psxNextsCounter - rcnts[i].cycleStart);
168 if( countToUpdate < 0 )
174 if( countToUpdate < (s32)psxNextCounter )
176 psxNextCounter = countToUpdate;
181 /******************************************************************************/
184 void psxRcntReset( u32 index )
188 if( rcnts[index].counterState == CountToTarget )
190 if( rcnts[index].mode & RcCountToTarget )
192 count = psxRegs.cycle;
193 count -= rcnts[index].cycleStart;
194 count /= rcnts[index].rate;
195 count -= rcnts[index].target;
199 count = _psxRcntRcount( index );
202 _psxRcntWcount( index, count );
204 if( rcnts[index].mode & RcIrqOnTarget )
206 if( (rcnts[index].mode & RcIrqRegenerate) || (!rcnts[index].irqState) )
208 verboseLog( 3, "[RCNT %i] irq: %x\n", index, count );
209 setIrq( rcnts[index].irq );
210 rcnts[index].irqState = 1;
214 rcnts[index].mode |= RcCountEqTarget;
216 else if( rcnts[index].counterState == CountToOverflow )
218 count = psxRegs.cycle;
219 count -= rcnts[index].cycleStart;
220 count /= rcnts[index].rate;
223 _psxRcntWcount( index, count );
225 if( rcnts[index].mode & RcIrqOnOverflow )
227 if( (rcnts[index].mode & RcIrqRegenerate) || (!rcnts[index].irqState) )
229 verboseLog( 3, "[RCNT %i] irq: %x\n", index, count );
230 setIrq( rcnts[index].irq );
231 rcnts[index].irqState = 1;
235 rcnts[index].mode |= RcOverflow;
238 rcnts[index].mode |= RcUnknown10;
247 cycle = psxRegs.cycle;
250 if( cycle - rcnts[0].cycleStart >= rcnts[0].cycle )
256 if( cycle - rcnts[1].cycleStart >= rcnts[1].cycle )
262 if( cycle - rcnts[2].cycleStart >= rcnts[2].cycle )
268 if( cycle - rcnts[3].cycleStart >= rcnts[3].cycle )
276 if( spuSyncCount >= SpuUpdInterval[Config.PsxType] )
282 SPU_async( SpuUpdInterval[Config.PsxType] * rcnts[3].target );
287 if( hSyncCount == VBlankStart[Config.PsxType] )
289 GPU_vBlank( 1, &hSyncCount );
291 // For the best times. :D
295 // Update lace. (with InuYasha fix)
296 if( hSyncCount >= (Config.VSyncWA ? HSyncTotal[Config.PsxType] / BIAS : HSyncTotal[Config.PsxType]) )
300 GPU_vBlank( 0, &hSyncCount );
311 /******************************************************************************/
313 void psxRcntWcount( u32 index, u32 value )
315 verboseLog( 2, "[RCNT %i] wcount: %x\n", index, value );
319 _psxRcntWcount( index, value );
323 void psxRcntWmode( u32 index, u32 value )
325 verboseLog( 1, "[RCNT %i] wmode: %x\n", index, value );
329 rcnts[index].mode = value;
330 rcnts[index].irqState = 0;
335 if( value & Rc0PixelClock )
337 rcnts[index].rate = 5;
341 rcnts[index].rate = 1;
345 if( value & Rc1HSyncClock )
347 rcnts[index].rate = (PSXCLK / (FrameRate[Config.PsxType] * HSyncTotal[Config.PsxType]));
351 rcnts[index].rate = 1;
355 if( value & Rc2OneEighthClock )
357 rcnts[index].rate = 8;
361 rcnts[index].rate = 1;
364 // TODO: wcount must work.
365 if( value & Rc2Disable )
367 rcnts[index].rate = 0xffffffff;
372 _psxRcntWcount( index, 0 );
376 void psxRcntWtarget( u32 index, u32 value )
378 verboseLog( 1, "[RCNT %i] wtarget: %x\n", index, value );
382 rcnts[index].target = value;
384 _psxRcntWcount( index, _psxRcntRcount( index ) );
388 /******************************************************************************/
390 u32 psxRcntRcount( u32 index )
396 count = _psxRcntRcount( index );
398 // Parasite Eve 2 fix.
403 if( rcnts[index].counterState == CountToTarget )
410 verboseLog( 2, "[RCNT %i] rcount: %x\n", index, count );
415 u32 psxRcntRmode( u32 index )
421 mode = rcnts[index].mode;
422 rcnts[index].mode &= 0xe7ff;
424 verboseLog( 2, "[RCNT %i] rmode: %x\n", index, mode );
429 u32 psxRcntRtarget( u32 index )
431 verboseLog( 2, "[RCNT %i] rtarget: %x\n", index, rcnts[index].target );
433 return rcnts[index].target;
436 /******************************************************************************/
456 rcnts[3].mode = RcCountToTarget;
457 rcnts[3].target = (PSXCLK / (FrameRate[Config.PsxType] * HSyncTotal[Config.PsxType]));
459 for( i = 0; i < CounterQuantity; ++i )
461 _psxRcntWcount( i, 0 );
470 /******************************************************************************/
472 s32 psxRcntFreeze( gzFile f, s32 Mode )
474 gzfreeze( &rcnts, sizeof(rcnts) );
475 gzfreeze( &hSyncCount, sizeof(hSyncCount) );
476 gzfreeze( &spuSyncCount, sizeof(spuSyncCount) );
477 gzfreeze( &psxNextCounter, sizeof(psxNextCounter) );
478 gzfreeze( &psxNextsCounter, sizeof(psxNextsCounter) );
483 /******************************************************************************/