X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=pico%2Fcd%2Fmcd.c;h=929b57f398f1e8200333018618afe3dcd01d8e5c;hb=12f23dac6f91eb707f985ef00a5d48e9e5ef8838;hp=a20b01dc4aa2656464eece9c1588540f4f99ba12;hpb=7b3ddc11dc21025f2a64116d664c745c07c54984;p=picodrive.git

diff --git a/pico/cd/mcd.c b/pico/cd/mcd.c
index a20b01d..929b57f 100644
--- a/pico/cd/mcd.c
+++ b/pico/cd/mcd.c
@@ -30,9 +30,11 @@ PICO_INTERNAL void PicoExitMCD(void)
 
 PICO_INTERNAL void PicoPowerMCD(void)
 {
+  int fmt_size;
+
   SekCycleCntS68k = SekCycleAimS68k = 0;
 
-  int fmt_size = sizeof(formatted_bram);
+  fmt_size = sizeof(formatted_bram);
   memset(Pico_mcd->prg_ram,    0, sizeof(Pico_mcd->prg_ram));
   memset(Pico_mcd->word_ram2M, 0, sizeof(Pico_mcd->word_ram2M));
   memset(Pico_mcd->pcm_ram,    0, sizeof(Pico_mcd->pcm_ram));
@@ -76,21 +78,46 @@ PICO_INTERNAL int PicoResetMCD(void)
 {
   // reset button doesn't affect MCD hardware
 
-  // use SRam.data for RAM cart
+  // use Pico.sv.data for RAM cart
   if (PicoOpt & POPT_EN_MCD_RAMCART) {
-    if (SRam.data == NULL)
-      SRam.data = calloc(1, 0x12000);
+    if (Pico.sv.data == NULL)
+      Pico.sv.data = calloc(1, 0x12000);
   }
-  else if (SRam.data != NULL) {
-    free(SRam.data);
-    SRam.data = NULL;
+  else if (Pico.sv.data != NULL) {
+    free(Pico.sv.data);
+    Pico.sv.data = NULL;
   }
-  SRam.start = SRam.end = 0; // unused
+  Pico.sv.start = Pico.sv.end = 0; // unused
 
   return 0;
 }
 
-static __inline void SekRunS68k(unsigned int to)
+static void SekRunM68kOnce(void)
+{
+  int cyc_do;
+  pevt_log_m68k_o(EVT_RUN_START);
+
+  if ((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);
+    Pico.t.m68c_cnt -= PicoCpuCM68k.cycles;
+#elif defined(EMU_M68K)
+    Pico.t.m68c_cnt += m68k_execute(cyc_do) - cyc_do;
+#elif defined(EMU_F68K)
+    Pico.t.m68c_cnt += fm68k_emulate(&PicoCpuFM68k, cyc_do, 0) - cyc_do;
+#endif
+  }
+
+  SekCyclesLeft = 0;
+
+  SekTrace(0);
+  pevt_log_m68k_o(EVT_RUN_END);
+}
+
+static void SekRunS68k(unsigned int to)
 {
   int cyc_do;
 
@@ -111,8 +138,7 @@ static __inline void SekRunS68k(unsigned int to)
   SekCycleCntS68k += m68k_execute(cyc_do) - cyc_do;
   m68k_set_context(&PicoCpuMM68k);
 #elif defined(EMU_F68K)
-  g_m68kcontext = &PicoCpuFS68k;
-  SekCycleCntS68k += fm68k_emulate(cyc_do, 0) - cyc_do;
+  SekCycleCntS68k += fm68k_emulate(&PicoCpuFS68k, cyc_do, 0) - cyc_do;
   g_m68kcontext = &PicoCpuFM68k;
 #endif
 }
@@ -121,7 +147,7 @@ static void pcd_set_cycle_mult(void)
 {
   // ~1.63 for NTSC, ~1.645 for PAL
   if (Pico.m.pal)
-    mcd_m68k_cycle_mult = ((12500000ull << 16) / (50*312*488));
+    mcd_m68k_cycle_mult = ((12500000ull << 16) / (50*313*488));
   else
     mcd_m68k_cycle_mult = ((12500000ull << 16) / (60*262*488)) + 1;
 }
@@ -175,10 +201,10 @@ typedef void (event_cb)(unsigned int now);
 unsigned int pcd_event_times[PCD_EVENT_COUNT];
 static unsigned int event_time_next;
 static event_cb *pcd_event_cbs[PCD_EVENT_COUNT] = {
-  [PCD_EVENT_CDC]      = pcd_cdc_event,
-  [PCD_EVENT_TIMER3]   = pcd_int3_timer_event,
-  [PCD_EVENT_GFX]      = gfx_update,
-  [PCD_EVENT_DMA]      = pcd_dma_event,
+  pcd_cdc_event,            // PCD_EVENT_CDC
+  pcd_int3_timer_event,     // PCD_EVENT_TIMER3
+  gfx_update,               // PCD_EVENT_GFX
+  pcd_dma_event,            // PCD_EVENT_DMA
 };
 
 void pcd_event_schedule(unsigned int now, enum pcd_event event, int after)
@@ -291,33 +317,39 @@ static void SekSyncM68k(void);
 
 void pcd_run_cpus_normal(int m68k_cycles)
 {
-  SekCycleAim += m68k_cycles;
+  Pico.t.m68c_aim += m68k_cycles;
   if (SekShouldInterrupt() || Pico_mcd->m.m68k_poll_cnt < 12)
     Pico_mcd->m.m68k_poll_cnt = 0;
   else if (Pico_mcd->m.m68k_poll_cnt >= 16) {
-    int s68k_left = pcd_sync_s68k(SekCycleAim, 1);
+    int s68k_left = pcd_sync_s68k(Pico.t.m68c_aim, 1);
     if (s68k_left <= 0) {
       elprintf(EL_CDPOLL, "m68k poll [%02x] x%d @%06x",
         Pico_mcd->m.m68k_poll_a, Pico_mcd->m.m68k_poll_cnt, SekPc);
-      SekCycleCnt = SekCycleAim;
+      Pico.t.m68c_cnt = Pico.t.m68c_aim;
       return;
     }
-    SekCycleCnt = SekCycleAim - (s68k_left * 40220 >> 16);
+    Pico.t.m68c_cnt = Pico.t.m68c_aim - (s68k_left * 40220 >> 16);
   }
 
-  SekSyncM68k();
+  while (CYCLES_GT(Pico.t.m68c_aim, Pico.t.m68c_cnt)) {
+    SekRunM68kOnce();
+    if (Pico_mcd->m.need_sync) {
+      Pico_mcd->m.need_sync = 0;
+      pcd_sync_s68k(Pico.t.m68c_cnt, 0);
+    }
+  }
 }
 
 void pcd_run_cpus_lockstep(int m68k_cycles)
 {
-  unsigned int target = SekCycleAim + m68k_cycles;
+  unsigned int target = Pico.t.m68c_aim + m68k_cycles;
   do {
-    SekCycleAim += 8;
+    Pico.t.m68c_aim += 8;
     SekSyncM68k();
-    pcd_sync_s68k(SekCycleAim, 0);
-  } while (CYCLES_GT(target, SekCycleAim));
+    pcd_sync_s68k(Pico.t.m68c_aim, 0);
+  } while (CYCLES_GT(target, Pico.t.m68c_aim));
 
-  SekCycleAim = target;
+  Pico.t.m68c_aim = target;
 }
 
 #define PICO_CD
@@ -333,7 +365,7 @@ void pcd_prepare_frame(void)
 
   // need this because we can't have direct mapping between
   // master<->slave cycle counters because of overflows
-  mcd_m68k_cycle_base = SekCycleAim;
+  mcd_m68k_cycle_base = Pico.t.m68c_aim;
   mcd_s68k_cycle_base = SekCycleAimS68k;
 }
 
@@ -359,7 +391,7 @@ void pcd_state_loaded(void)
   Pico_mcd->pcm_regs_dirty = 1;
 
   // old savestates..
-  cycles = pcd_cycles_m68k_to_s68k(SekCycleAim);
+  cycles = pcd_cycles_m68k_to_s68k(Pico.t.m68c_aim);
   diff = cycles - SekCycleAimS68k;
   if (diff < -1000 || diff > 1000) {
     SekCycleCntS68k = SekCycleAimS68k = cycles;