better mmuhack usage

[picodrive.git] / Pico / cd / Pico.c

diff --git a/Pico/cd/Pico.c b/Pico/cd/Pico.c
index 00be7b6..a0f2880 100644 (file)
--- a/Pico/cd/Pico.c
+++ b/Pico/cd/Pico.c
@@ -1,10 +1,4 @@
-// This is part of Pico Library
-
-// (c) Copyright 2004 Dave, All rights reserved.
 // (c) Copyright 2007 notaz, All rights reserved.
-// Free for non-commercial use.
-
-// For commercial use, separate licencing terms must be obtained.
 
 
 #include "../PicoInt.h"
@@ -14,6 +8,8 @@
 extern unsigned char formatted_bram[4*0x10];
 extern unsigned int s68k_poll_adclk;
 
+void (*PicoMCDopenTray)(void) = NULL;
+int  (*PicoMCDcloseTray)(void) = NULL;
 
 #define dump_ram(ram,fname) \
 { \
@@ -79,6 +75,12 @@ int PicoResetMCD(int hard)
   //PicoMemResetCDdecode(1); // don't have to call this in 2M mode
 #endif
 
+  // use SRam.data for RAM cart
+  if (SRam.data) free(SRam.data);
+  SRam.data = NULL;
+  if (PicoOpt&0x8000)
+    SRam.data = calloc(1, 0x12000);
+
   return 0;
 }
 
@@ -214,13 +216,15 @@ static __inline void update_chips(void)
        // delayed setting of DMNA bit (needed for Silpheed)
        if (Pico_mcd->m.state_flags & 2) {
                Pico_mcd->m.state_flags &= ~2;
-               Pico_mcd->s68k_regs[3] |=  2;
-               Pico_mcd->s68k_regs[3] &= ~1;
+               if (!(Pico_mcd->s68k_regs[3] & 4)) {
+                       Pico_mcd->s68k_regs[3] |=  2;
+                       Pico_mcd->s68k_regs[3] &= ~1;
 #ifdef USE_POLL_DETECT
-               if ((s68k_poll_adclk&0xfe) == 2) {
-                       SekSetStopS68k(0); s68k_poll_adclk = 0;
-               }
+                       if ((s68k_poll_adclk&0xfe) == 2) {
+                               SekSetStopS68k(0); s68k_poll_adclk = 0;
+                       }
 #endif
+               }
        }
 }
 
@@ -331,8 +335,15 @@ static int PicoFrameHintsMCD(void)
     }
 
     if ((PicoOpt&4) && Pico.m.z80Run) {
-      Pico.m.z80Run|=2;
-      z80CycleAim+=cycles_z80;
+      if (Pico.m.z80Run & 2) z80CycleAim+=cycles_z80;
+      else {
+        int cnt = SekCyclesDone() - z80startCycle;
+        cnt = (cnt>>1)-(cnt>>5);
+        //if (cnt > cycles_z80) printf("FIXME: z80 cycles: %i\n", cnt);
+        if (cnt > cycles_z80) cnt = cycles_z80;
+        Pico.m.z80Run |= 2;
+        z80CycleAim+=cnt;
+      }
       total_z80+=z80_run(z80CycleAim-total_z80);
     }