From 583ab72c0b42549235191fd4fad239074dd896af Mon Sep 17 00:00:00 2001
From: notaz <notasas@gmail.com>
Date: Sat, 26 Apr 2008 20:11:19 +0000
Subject: [PATCH] eeprom crash fix, PacMan2 hack

git-svn-id: file:///home/notaz/opt/svn/PicoDrive@431 be3aeb3a-fb24-0410-a615-afba39da0efa
---
 Pico/MemoryCmn.c      | 11 +++++++----
 Pico/Pico.c           |  3 +++
 Pico/PicoFrameHints.c |  4 +++-
 3 files changed, 13 insertions(+), 5 deletions(-)

diff --git a/Pico/MemoryCmn.c b/Pico/MemoryCmn.c
index 67cb925..62e6867 100644
--- a/Pico/MemoryCmn.c
+++ b/Pico/MemoryCmn.c
@@ -122,7 +122,7 @@ u32 OtherRead16(u32 a, int realsize)
   if ((a&0xff0000)==0xa00000)
   {
     if (Pico.m.z80Run&1)
-      elprintf(EL_ANOMALY, "68k z80 read with no bus! [%06x]", a);
+      elprintf(EL_ANOMALY, "68k z80 read with no bus! [%06x] @ %06x", a, SekPc);
     if ((a&0x4000)==0x0000) { d=z80Read8(a); d|=d<<8; goto end; } // Z80 ram (not byteswaped)
     if ((a&0x6000)==0x4000) { // 0x4000-0x5fff, Fudge if disabled
       if(PicoOpt&POPT_EN_FM) d=YM2612Read();
@@ -145,7 +145,7 @@ static void IoWrite8(u32 a, u32 d)
 {
   a=(a>>1)&0xf;
   // 6 button gamepad: if TH went from 0 to 1, gamepad changes state
-  if(PicoOpt&POPT_6BTN_PAD)
+  if (PicoOpt&POPT_6BTN_PAD)
   {
     if (a==1) {
       Pico.m.padDelay[0] = 0;
@@ -168,7 +168,10 @@ void OtherWrite8(u32 a,u32 d)
   if ((a&0xe700f9)==0xc00011||(a&0xff7ff9)==0xa07f11) { if(PicoOpt&2) SN76496Write(d); return; } // PSG Sound
   if ((a&0xff4000)==0xa00000) { // z80 RAM
     if (!(Pico.m.z80Run&1)) Pico.zram[a&0x1fff]=(u8)d;
-    else elprintf(EL_ANOMALY, "68k z80 write with no bus! [%06x] %02x", a, d);
+    else {
+      elprintf(EL_ANOMALY, "68k z80 write with no bus! [%06x] %02x @ %06x", a, d, SekPc);
+      SekCyclesBurn(4); // hack?
+    }
     return;
   }
   if ((a&0xff6000)==0xa04000)  { if(PicoOpt&1) emustatus|=YM2612Write(a&3, d)&1; return; } // FM Sound
@@ -216,7 +219,7 @@ void OtherWrite16(u32 a,u32 d)
   if ((a&0xff6000)==0xa04000) { if(PicoOpt&1) emustatus|=YM2612Write(a&3, d)&1; return; } // FM Sound (??)
   if ((a&0xff4000)==0xa00000) { // Z80 ram (MSB only)
     if (!(Pico.m.z80Run&1)) Pico.zram[a&0x1fff]=(u8)(d>>8);
-    else elprintf(EL_ANOMALY, "68k z80 write with no bus! [%06x] %02x", a, d);
+    else elprintf(EL_ANOMALY, "68k z80 write with no bus! [%06x] %02x @ %06x", a, d, SekPc);
     return;
   }
   if (a==0xa11200) {
diff --git a/Pico/Pico.c b/Pico/Pico.c
index 2edc8ee..7fa152a 100644
--- a/Pico/Pico.c
+++ b/Pico/Pico.c
@@ -57,6 +57,8 @@ void PicoExit(void)
 
 void PicoPower(void)
 {
+  unsigned char sram_reg=Pico.m.sram_reg; // must be preserved
+
   // clear all memory of the emulated machine
   memset(&Pico.ram,0,(unsigned int)&Pico.rom-(unsigned int)&Pico.ram);
 
@@ -74,6 +76,7 @@ void PicoPower(void)
   if (PicoAHW & PAHW_MCD)
     PicoPowerMCD();
 
+  Pico.m.sram_reg=sram_reg;
   PicoReset();
 }
 
diff --git a/Pico/PicoFrameHints.c b/Pico/PicoFrameHints.c
index 32bd235..d1efa9a 100644
--- a/Pico/PicoFrameHints.c
+++ b/Pico/PicoFrameHints.c
@@ -209,8 +209,10 @@ static int PicoFrameHints(void)
     elprintf(EL_INTS, "vint: @ %06x [%i]", SekPc, SekCycleCnt);
     SekInterrupt(6);
   }
-  if (Pico.m.z80Run && (PicoOpt&POPT_EN_Z80))
+  if (Pico.m.z80Run && (PicoOpt&POPT_EN_Z80)) {
+    elprintf(EL_INTS, "zint");
     z80_int();
+  }
 
   if (PicoOpt&POPT_EN_FM)
     Psnd_timers_and_dac(y);
-- 
2.39.2