void (*PicoLineHook)(int count) = NULL;\r
\r
// to be called once on emu init\r
-int PicoInit(void)\r
+void PicoInit(void)\r
{\r
// Blank space for state:\r
memset(&Pico,0,sizeof(Pico));\r
PicoSVPInit();\r
\r
SRam.data=0;\r
-\r
- return 0;\r
}\r
\r
// to be called once on emu exit\r
#endif\r
}\r
\r
-static __inline void SekStep(void)\r
-{\r
- // this is required for timing sensitive stuff to work\r
- int realaim=SekCycleAim; SekCycleAim=SekCycleCnt+1;\r
-#if defined(EMU_CORE_DEBUG)\r
- SekCycleCnt+=CM_compareRun(1, 0);\r
-#elif defined(EMU_C68K)\r
- PicoCpuCM68k.cycles=1;\r
- CycloneRun(&PicoCpuCM68k);\r
- SekCycleCnt+=1-PicoCpuCM68k.cycles;\r
-#elif defined(EMU_M68K)\r
- SekCycleCnt+=m68k_execute(1);\r
-#elif defined(EMU_F68K)\r
- SekCycleCnt+=fm68k_emulate(1, 0);\r
-#endif\r
- SekCycleAim=realaim;\r
-}\r
-\r
-static int CheckIdle(void)\r
-{\r
- int i, state[0x24];\r
-\r
- // See if the state is the same after 2 steps:\r
- SekState(state); SekStep(); SekStep(); SekState(state+0x12);\r
- for (i = 0x11; i >= 0; i--)\r
- if (state[i] != state[i+0x12]) return 0;\r
-\r
- return 1;\r
-}\r
-\r
\r
// to be called on 224 or line_sample scanlines only\r
static __inline void getSamples(int y)\r
}\r
\r
\r
-// Simple frame without H-Ints\r
-static int PicoFrameSimple(void)\r
-{\r
- struct PicoVideo *pv=&Pico.video;\r
- int y=0,lines_step=0,sects,line_last;\r
- int cycles_68k_vblock,cycles_68k_block;\r
-\r
- // split to 16 run calls for active scan, for vblank split to 2 (ntsc), 3 (pal 240), 4 (pal 224)\r
- if (Pico.m.pal)\r
- {\r
- if(pv->reg[1]&8) { // 240 lines\r
- cycles_68k_block = 7308;\r
- cycles_68k_vblock = 11694;\r
- lines_step = 15;\r
- } else {\r
- cycles_68k_block = 6821;\r
- cycles_68k_vblock = 10719;\r
- lines_step = 14;\r
- }\r
- line_last = 312-1;\r
- } else {\r
- // M68k cycles/frame: 127840.71\r
- cycles_68k_block = 6841; // (488*224+148)/16.0, -4\r
- cycles_68k_vblock = 9164; // (38*488-148-68)/2.0, 0\r
- lines_step = 14;\r
- line_last = 262-1;\r
- }\r
-\r
- // a hack for VR, to get it running in fast mode\r
- if (PicoAHW & PAHW_SVP)\r
- Pico.ram[0xd864^1] = 0x1a;\r
-\r
- // we don't emulate DMA timing in this mode\r
- if (Pico.m.dma_xfers) {\r
- Pico.m.dma_xfers=0;\r
- Pico.video.status&=~2;\r
- }\r
-\r
- // VDP FIFO too\r
- pv->lwrite_cnt = 0;\r
- Pico.video.status|=0x200;\r
-\r
- Pico.m.scanline=-1;\r
- PsndDacLine = 0;\r
-\r
- SekCyclesReset();\r
- z80_resetCycles();\r
-\r
- // 6 button pad: let's just say it timed out now\r
- Pico.m.padTHPhase[0]=Pico.m.padTHPhase[1]=0;\r
-\r
- // ---- Active Scan ----\r
- pv->status&=~0x88; // clear V-Int, come out of vblank\r
-\r
- // Run in sections:\r
- for (sects=16; sects; sects--)\r
- {\r
- if (CheckIdle()) break;\r
-\r
- SekRunM68k(cycles_68k_block);\r
- if (PicoLineHook) PicoLineHook(lines_step);\r
- }\r
-\r
- // do remaining sections without 68k\r
- if (sects) {\r
- SekCycleCnt += sects * cycles_68k_block;\r
- SekCycleAim += sects * cycles_68k_block;\r
-\r
- if (PicoLineHook) PicoLineHook(sects*lines_step);\r
- }\r
-\r
- // another hack for VR (it needs hints to work)\r
- if (PicoAHW & PAHW_SVP) {\r
- Pico.ram[0xd864^1] = 1;\r
- pv->pending_ints|=0x10;\r
- if (pv->reg[0]&0x10) SekInterrupt(4);\r
- SekRunM68k(160);\r
- }\r
-\r
- // render screen\r
- if (!PicoSkipFrame)\r
- {\r
- if (!(PicoOpt&POPT_ALT_RENDERER))\r
- {\r
- // Draw the screen\r
-#if 0\r
-#if CAN_HANDLE_240_LINES\r
- if (pv->reg[1]&8) {\r
- for (y=0;y<240;y++) PicoLine(y);\r
- } else {\r
- for (y=0;y<224;y++) PicoLine(y);\r
- }\r
-#else\r
- for (y=0;y<224;y++) PicoLine(y);\r
-#endif\r
-#endif\r
- }\r
- else PicoFrameFull();\r
-#ifdef DRAW_FINISH_FUNC\r
- DRAW_FINISH_FUNC();\r
-#endif\r
- }\r
-\r
- // a gap between flags set and vint\r
- pv->pending_ints|=0x20;\r
- pv->status|=8; // go into vblank\r
- SekRunM68k(68+4);\r
-\r
- if (Pico.m.z80Run && (PicoOpt&POPT_EN_Z80))\r
- PicoSyncZ80(SekCycleCnt);\r
-\r
- // render sound\r
- if (PsndOut)\r
- {\r
- int len;\r
- if (ym2612.dacen && PsndDacLine <= lines_step*16)\r
- PsndDoDAC(lines_step*16);\r
- len = PsndRender(0, PsndLen);\r
- if (PicoWriteSound) PicoWriteSound(len);\r
- // clear sound buffer\r
- PsndClear();\r
- }\r
-\r
- // ---- V-Blanking period ----\r
- // fix line counts\r
- if(Pico.m.pal) {\r
- if(pv->reg[1]&8) { // 240 lines\r
- sects = 3;\r
- lines_step = 24;\r
- } else {\r
- sects = 4;\r
- lines_step = 22;\r
- }\r
- } else {\r
- sects = 2;\r
- lines_step = 19;\r
- }\r
-\r
- if (pv->reg[1]&0x20) SekInterrupt(6); // Set IRQ\r
- if (Pico.m.z80Run && (PicoOpt&POPT_EN_Z80))\r
- z80_int();\r
-\r
- while (1)\r
- {\r
- SekRunM68k(cycles_68k_vblock);\r
- if (PicoLineHook) PicoLineHook(lines_step);\r
-\r
- sects--;\r
- if (sects == 0) break;\r
- if (CheckIdle()) break;\r
- }\r
-\r
- if (sects) {\r
- SekCycleCnt += sects * cycles_68k_vblock;\r
- SekCycleAim += sects * cycles_68k_vblock;\r
- if (PicoLineHook) PicoLineHook(sects*lines_step);\r
- }\r
-\r
- // must sync z80 before return, and extend last DAC sample\r
- if (Pico.m.z80Run && (PicoOpt&POPT_EN_Z80))\r
- PicoSyncZ80(SekCycleCnt);\r
- if (PsndOut && ym2612.dacen && PsndDacLine <= line_last)\r
- PsndDoDAC(line_last);\r
-\r
- timers_cycle();\r
-\r
- return 0;\r
-}\r
-\r
int idle_hit_counter = 0;\r
\r
-int PicoFrame(void)\r
+void PicoFrame(void)\r
{\r
- int acc;\r
-\r
+#if 0\r
if ((Pico.m.frame_count&0x3f) == 0) {\r
elprintf(EL_STATUS, "ihits: %i", idle_hit_counter);\r
idle_hit_counter = 0;\r
}\r
+#endif\r
\r
Pico.m.frame_count++;\r
\r
if (PicoAHW & PAHW_MCD) {\r
PicoFrameMCD();\r
- return 0;\r
+ return;\r
}\r
\r
- // be accurate if we are asked for this\r
- if (PicoOpt&POPT_ACC_TIMING) acc=1;\r
- // don't be accurate in alternative render mode, as hint effects will not be rendered anyway\r
- else if (PicoOpt&POPT_ALT_RENDERER) acc = 0;\r
- else acc=Pico.video.reg[0]&0x10; // be accurate if hints are used\r
-\r
//if(Pico.video.reg[12]&0x2) Pico.video.status ^= 0x10; // change odd bit in interlace mode\r
\r
if (!(PicoOpt&POPT_ALT_RENDERER))\r
PicoFrameStart();\r
\r
- if (acc)\r
- PicoFrameHints();\r
- else PicoFrameSimple();\r
-\r
- return 0;\r
+ PicoFrameHints();\r
}\r
\r
void PicoFrameDrawOnly(void)\r
{\r
- int y;\r
PicoFrameStart();\r
- for (y=0;y<224;y++) PicoLine(y);\r
+ PicoDrawSync(223, 0);\r
}\r
\r
void PicoGetInternal(pint_t which, pint_ret_t *r)\r
notaz.gp2x.de / picodrive.git / blobdiff