X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=pico%2Fpico_cmn.c;h=95b6b10376bec92551b2f45e06686ef6cb04e417;hb=6311a3baf533d4a034e51dfe38e8cb213a1bf442;hp=b44bfba20ca458ded6692196ba4d39117d1dd540;hpb=e42a47e2086e6512519dd86af420363498302f49;p=picodrive.git

diff --git a/pico/pico_cmn.c b/pico/pico_cmn.c
index b44bfba..95b6b10 100644
--- a/pico/pico_cmn.c
+++ b/pico/pico_cmn.c
@@ -7,7 +7,7 @@
  */
 
 #define CYCLES_M68K_LINE     488 // suitable for both PAL/NTSC
-#define CYCLES_M68K_VINT_LAG  68
+#define CYCLES_M68K_VINT_LAG 112
 
 // pad delay (for 6 button pads)
 #define PAD_DELAY() { \
@@ -21,24 +21,24 @@
   SekRunM68k(m68k_cycles)
 #endif
 
-// sync m68k to SekCycleAim
+// sync m68k to Pico.t.m68c_aim
 static void SekSyncM68k(void)
 {
   int cyc_do;
   pprof_start(m68k);
   pevt_log_m68k_o(EVT_RUN_START);
 
-  while ((cyc_do = SekCycleAim - SekCycleCnt) > 0) {
-    SekCycleCnt += cyc_do;
+  while ((cyc_do = Pico.t.m68c_aim - Pico.t.m68c_cnt) > 0) {
+    Pico.t.m68c_cnt += cyc_do;
 
 #if defined(EMU_C68K)
     PicoCpuCM68k.cycles = cyc_do;
     CycloneRun(&PicoCpuCM68k);
-    SekCycleCnt -= PicoCpuCM68k.cycles;
+    Pico.t.m68c_cnt -= PicoCpuCM68k.cycles;
 #elif defined(EMU_M68K)
-    SekCycleCnt += m68k_execute(cyc_do) - cyc_do;
+    Pico.t.m68c_cnt += m68k_execute(cyc_do) - cyc_do;
 #elif defined(EMU_F68K)
-    SekCycleCnt += fm68k_emulate(cyc_do, 0) - cyc_do;
+    Pico.t.m68c_cnt += fm68k_emulate(&PicoCpuFM68k, cyc_do, 0) - cyc_do;
 #endif
   }
 
@@ -49,13 +49,13 @@ static void SekSyncM68k(void)
   pprof_end(m68k);
 }
 
-static inline void SekRunM68k(int cyc)
+static __inline void SekRunM68k(int cyc)
 {
-  SekCycleAim += cyc;
-  cyc = SekCycleAim - SekCycleCnt;
+  Pico.t.m68c_aim += cyc;
+  cyc = Pico.t.m68c_aim - Pico.t.m68c_cnt;
   if (cyc <= 0)
     return;
-  SekCycleCnt += cyc >> 6; // refresh slowdowns
+  Pico.t.m68c_cnt += cyc >> 6; // refresh slowdowns
   SekSyncM68k();
 }
 
@@ -68,19 +68,36 @@ static void do_hint(struct PicoVideo *pv)
   }
 }
 
+static void do_timing_hacks_as(struct PicoVideo *pv, int vdp_slots)
+{
+  pv->lwrite_cnt += vdp_slots - Pico.m.dma_xfers * 2; // wrong *2
+  if (pv->lwrite_cnt > vdp_slots)
+    pv->lwrite_cnt = vdp_slots;
+  else if (pv->lwrite_cnt < 0)
+    pv->lwrite_cnt = 0;
+  if (Pico.m.dma_xfers)
+    SekCyclesBurn(CheckDMA());
+}
+
+static void do_timing_hacks_vb(void)
+{
+  if (unlikely(Pico.m.dma_xfers))
+    SekCyclesBurn(CheckDMA());
+}
+
 static int PicoFrameHints(void)
 {
   struct PicoVideo *pv = &Pico.video;
   int line_sample = Pico.m.pal ? 68 : 93;
+  int vdp_slots = (Pico.video.reg[12] & 1) ? 18 : 16;
   int lines, y, lines_vis, skip;
   int vcnt_wrap, vcnt_adj;
   unsigned int cycles;
   int hint; // Hint counter
 
   pevt_log_m68k_o(EVT_FRAME_START);
-  pv->v_counter = Pico.m.scanline = 0;
 
-  if ((PicoOpt&POPT_ALT_RENDERER) && !PicoSkipFrame && (pv->reg[1]&0x40)) { // fast rend., display enabled
+  if ((PicoIn.opt&POPT_ALT_RENDERER) && !PicoIn.skipFrame && (pv->reg[1]&0x40)) { // fast rend., display enabled
     // draw a frame just after vblank in alternative render mode
     // yes, this will cause 1 frame lag, but this is inaccurate mode anyway.
     PicoFrameFull();
@@ -89,8 +106,10 @@ static int PicoFrameHints(void)
 #endif
     skip = 1;
   }
-  else skip=PicoSkipFrame;
+  else skip=PicoIn.skipFrame;
 
+  Pico.t.m68c_frame_start = Pico.t.m68c_aim;
+  pv->v_counter = Pico.m.scanline = 0;
   z80_resetCycles();
   PsndStartFrame();
 
@@ -111,13 +130,6 @@ static int PicoFrameHints(void)
     if ((y == 224 && !(pv->reg[1] & 8)) || y == 240)
       break;
 
-    // VDP FIFO
-    pv->lwrite_cnt -= 12;
-    if (pv->lwrite_cnt <= 0) {
-      pv->lwrite_cnt = 0;
-      Pico.video.status |= SR_EMPT;
-    }
-
     PAD_DELAY();
 
     // H-Interrupts:
@@ -128,7 +140,7 @@ static int PicoFrameHints(void)
     }
 
     // decide if we draw this line
-    if (!skip && (PicoOpt & POPT_ALT_RENDERER))
+    if (!skip && (PicoIn.opt & POPT_ALT_RENDERER))
     {
       // find the right moment for frame renderer, when display is no longer blanked
       if ((pv->reg[1]&0x40) || y > 100) {
@@ -141,14 +153,14 @@ static int PicoFrameHints(void)
     }
 
     // get samples from sound chips
-    if ((y == 224 || y == line_sample) && PsndOut)
+    if ((y == 224 || y == line_sample) && PicoIn.sndOut)
     {
       cycles = SekCyclesDone();
 
-      if (Pico.m.z80Run && !Pico.m.z80_reset && (PicoOpt&POPT_EN_Z80))
+      if (Pico.m.z80Run && !Pico.m.z80_reset && (PicoIn.opt&POPT_EN_Z80))
         PicoSyncZ80(cycles);
 #ifdef PICO_CD
-      if (PicoAHW & PAHW_MCD)
+      if (PicoIn.AHW & PAHW_MCD)
         pcd_sync_s68k(cycles, 0);
 #endif
 #ifdef PICO_32X
@@ -158,8 +170,8 @@ static int PicoFrameHints(void)
     }
 
     // Run scanline:
-    line_base_cycles = SekCyclesDone();
-    if (Pico.m.dma_xfers) SekCyclesBurn(CheckDMA());
+    Pico.t.m68c_line_start = Pico.t.m68c_aim;
+    do_timing_hacks_as(pv, vdp_slots);
     CPUS_RUN(CYCLES_M68K_LINE);
 
     if (PicoLineHook) PicoLineHook();
@@ -183,7 +195,7 @@ static int PicoFrameHints(void)
   pv->lwrite_cnt = 0;
   Pico.video.status |= SR_EMPT;
 
-  memcpy(PicoPadInt, PicoPad, sizeof(PicoPadInt));
+  memcpy(PicoIn.padInt, PicoIn.pad, sizeof(PicoIn.padInt));
   PAD_DELAY();
 
   // Last H-Int (normally):
@@ -193,31 +205,34 @@ static int PicoFrameHints(void)
     do_hint(pv);
   }
 
-  pv->status |= SR_VB; // go into vblank
-  pv->pending_ints |= 0x20;
+  pv->status |= SR_VB | PVS_VB2; // go into vblank
 
   // the following SekRun is there for several reasons:
   // there must be a delay after vblank bit is set and irq is asserted (Mazin Saga)
   // also delay between F bit (bit 7) is set in SR and IRQ happens (Ex-Mutants)
   // also delay between last H-int and V-int (Golden Axe 3)
-  line_base_cycles = SekCyclesDone();
-  if (Pico.m.dma_xfers) SekCyclesBurn(CheckDMA());
+  Pico.t.m68c_line_start = Pico.t.m68c_aim;
+  do_timing_hacks_vb();
   CPUS_RUN(CYCLES_M68K_VINT_LAG);
 
+  pv->status |= SR_F;
+  pv->pending_ints |= 0x20;
   if (pv->reg[1] & 0x20) {
+    Pico.t.m68c_aim = Pico.t.m68c_cnt + 11; // HACK
+    SekSyncM68k();
     elprintf(EL_INTS, "vint: @ %06x [%u]", SekPc, SekCyclesDone());
     SekInterrupt(6);
   }
 
   cycles = SekCyclesDone();
-  if (Pico.m.z80Run && !Pico.m.z80_reset && (PicoOpt&POPT_EN_Z80)) {
+  if (Pico.m.z80Run && !Pico.m.z80_reset && (PicoIn.opt&POPT_EN_Z80)) {
     PicoSyncZ80(cycles);
     elprintf(EL_INTS, "zint");
     z80_int();
   }
 
 #ifdef PICO_CD
-  if (PicoAHW & PAHW_MCD)
+  if (PicoIn.AHW & PAHW_MCD)
     pcd_sync_s68k(cycles, 0);
 #endif
 #ifdef PICO_32X
@@ -226,7 +241,7 @@ static int PicoFrameHints(void)
 #endif
 
   // get samples from sound chips
-  if (y == 224 && PsndOut)
+  if (y == 224 && PicoIn.sndOut)
     PsndGetSamples(y);
 
   // Run scanline:
@@ -257,26 +272,37 @@ static int PicoFrameHints(void)
 
     PAD_DELAY();
 
-    if ((pv->status & PVS_ACTIVE) && --hint < 0)
+    if (unlikely(pv->status & PVS_ACTIVE) && --hint < 0)
     {
       hint = pv->reg[10]; // Reload H-Int counter
       do_hint(pv);
     }
 
     // Run scanline:
-    line_base_cycles = SekCyclesDone();
-    if (Pico.m.dma_xfers) SekCyclesBurn(CheckDMA());
+    Pico.t.m68c_line_start = Pico.t.m68c_aim;
+    do_timing_hacks_vb();
     CPUS_RUN(CYCLES_M68K_LINE);
 
     if (PicoLineHook) PicoLineHook();
     pevt_log_m68k_o(EVT_NEXT_LINE);
   }
 
-  pv->status &= ~SR_VB;
+  if (unlikely(PicoIn.overclockM68k)) {
+    unsigned int l = PicoIn.overclockM68k * lines / 100;
+    while (l-- > 0) {
+      Pico.t.m68c_cnt -= CYCLES_M68K_LINE;
+      do_timing_hacks_vb();
+      SekSyncM68k();
+    }
+  }
+
+  pv->status &= ~(SR_VB | PVS_VB2);
+  pv->status |= ((pv->reg[1] >> 3) ^ SR_VB) & SR_VB; // forced blanking
 
   // last scanline
   Pico.m.scanline = y;
   pv->v_counter = 0xff;
+  pv->lwrite_cnt = 0;
 
   PAD_DELAY();
 
@@ -287,8 +313,8 @@ static int PicoFrameHints(void)
   }
 
   // Run scanline:
-  line_base_cycles = SekCyclesDone();
-  if (Pico.m.dma_xfers) SekCyclesBurn(CheckDMA());
+  Pico.t.m68c_line_start = Pico.t.m68c_aim;
+  do_timing_hacks_as(pv, vdp_slots);
   CPUS_RUN(CYCLES_M68K_LINE);
 
   if (PicoLineHook) PicoLineHook();
@@ -296,15 +322,15 @@ static int PicoFrameHints(void)
 
   // sync cpus
   cycles = SekCyclesDone();
-  if (Pico.m.z80Run && !Pico.m.z80_reset && (PicoOpt&POPT_EN_Z80))
+  if (Pico.m.z80Run && !Pico.m.z80_reset && (PicoIn.opt&POPT_EN_Z80))
     PicoSyncZ80(cycles);
-  if (PsndOut && ym2612.dacen && PsndDacLine < lines)
+  if (PicoIn.sndOut && ym2612.dacen && Pico.snd.dac_line < lines)
     PsndDoDAC(lines - 1);
-  if (PsndOut && PsndPsgLine < lines)
+  if (PicoIn.sndOut && Pico.snd.psg_line < lines)
     PsndDoPSG(lines - 1);
 
 #ifdef PICO_CD
-  if (PicoAHW & PAHW_MCD)
+  if (PicoIn.AHW & PAHW_MCD)
     pcd_sync_s68k(cycles, 0);
 #endif
 #ifdef PICO_32X