-// This is part of Pico Library\r
-\r
-// (c) Copyright 2004 Dave, All rights reserved.\r
-// (c) Copyright 2007 notaz, All rights reserved.\r
-// Free for non-commercial use.\r
-\r
-// For commercial use, separate licencing terms must be obtained.\r
+// Memory I/O handlers for Sega/Mega CD.\r
+// Loosely based on Gens code.\r
+// (c) Copyright 2007, Grazvydas "notaz" Ignotas\r
\r
// A68K no longer supported here\r
\r
//#define __debug_io\r
//#define __debug_io2\r
\r
-//#define rdprintf dprintf\r
-#define rdprintf(...)\r
+#define rdprintf dprintf\r
+//#define rdprintf(...)\r
//#define wrdprintf dprintf\r
#define wrdprintf(...)\r
-//#define plprintf dprintf\r
-#define plprintf(...)\r
+#define plprintf dprintf\r
+//#define plprintf(...)\r
\r
// -----------------------------------------------------------------\r
\r
Pico_mcd->m.busreq = d;\r
return;\r
case 2:\r
+ dprintf("m68k: prg wp=%02x", d);\r
Pico_mcd->s68k_regs[2] = d; // really use s68k side register\r
return;\r
case 3: {\r
{\r
if ((a&0xffffc0)==0xa12000) { m68k_reg_write8(a, d); return; }\r
\r
- dprintf("m68k FIXME: strange w%i: %06x, %08x @%06x", realsize, a&0xffffff, d, SekPc);\r
+ dprintf("m68k FIXME: strange w%i: [%06x], %08x @%06x", realsize, a&0xffffff, d, SekPc);\r
}\r
\r
\r
if (a < 0x20000) { d = *(u8 *)(Pico_mcd->bios+(a^1)); goto end; } // bios\r
\r
// prg RAM\r
- if ((a&0xfe0000)==0x020000 && (Pico_mcd->m.busreq&2)) {\r
+ if ((a&0xfe0000)==0x020000 && (Pico_mcd->m.busreq&3)!=1) {\r
u8 *prg_bank = Pico_mcd->prg_ram_b[Pico_mcd->s68k_regs[3]>>6];\r
d = *(prg_bank+((a^1)&0x1ffff));\r
goto end;\r
if (a < 0x20000) { d = *(u16 *)(Pico_mcd->bios+a); goto end; } // bios\r
\r
// prg RAM\r
- if ((a&0xfe0000)==0x020000 && (Pico_mcd->m.busreq&2)) {\r
+ if ((a&0xfe0000)==0x020000 && (Pico_mcd->m.busreq&3)!=1) {\r
u8 *prg_bank = Pico_mcd->prg_ram_b[Pico_mcd->s68k_regs[3]>>6];\r
wrdprintf("m68k_prgram r16: [%i,%06x] @%06x", Pico_mcd->s68k_regs[3]>>6, a, SekPc);\r
d = *(u16 *)(prg_bank+(a&0x1fffe));\r
if (a < 0x20000) { u16 *pm=(u16 *)(Pico_mcd->bios+a); d = (pm[0]<<16)|pm[1]; goto end; } // bios\r
\r
// prg RAM\r
- if ((a&0xfe0000)==0x020000 && (Pico_mcd->m.busreq&2)) {\r
+ if ((a&0xfe0000)==0x020000 && (Pico_mcd->m.busreq&3)!=1) {\r
u8 *prg_bank = Pico_mcd->prg_ram_b[Pico_mcd->s68k_regs[3]>>6];\r
u16 *pm=(u16 *)(prg_bank+(a&0x1fffe));\r
d = (pm[0]<<16)|pm[1];\r
\r
\r
// -----------------------------------------------------------------\r
-// Write Ram\r
\r
#ifdef _ASM_CD_MEMORY_C\r
void PicoWriteM68k8(u32 a,u8 d);\r
a&=0xffffff;\r
\r
// prg RAM\r
- if ((a&0xfe0000)==0x020000 && (Pico_mcd->m.busreq&2)) {\r
+ if ((a&0xfe0000)==0x020000 && (Pico_mcd->m.busreq&3)!=1) {\r
u8 *prg_bank = Pico_mcd->prg_ram_b[Pico_mcd->s68k_regs[3]>>6];\r
*(u8 *)(prg_bank+((a^1)&0x1ffff))=d;\r
return;\r
a&=0xfffffe;\r
\r
// prg RAM\r
- if ((a&0xfe0000)==0x020000 && (Pico_mcd->m.busreq&2)) {\r
+ if ((a&0xfe0000)==0x020000 && (Pico_mcd->m.busreq&3)!=1) {\r
u8 *prg_bank = Pico_mcd->prg_ram_b[Pico_mcd->s68k_regs[3]>>6];\r
wrdprintf("m68k_prgram w16: [%i,%06x] %04x @%06x", Pico_mcd->s68k_regs[3]>>6, a, d, SekPc);\r
*(u16 *)(prg_bank+(a&0x1fffe))=d;\r
Pico_mcd->s68k_regs[0xe] = d >> 8;\r
#ifdef USE_POLL_DETECT\r
if ((s68k_poll_adclk&0xfe) == 0xe && s68k_poll_cnt > POLL_LIMIT) {\r
- SekSetStopS68k(0); s68k_poll_adclk = -1;\r
+ SekSetStopS68k(0); s68k_poll_adclk = 0;\r
plprintf("s68k poll release, a=%02x\n", a);\r
}\r
#endif\r
a&=0xfffffe;\r
\r
// prg RAM\r
- if ((a&0xfe0000)==0x020000 && (Pico_mcd->m.busreq&2)) {\r
+ if ((a&0xfe0000)==0x020000 && (Pico_mcd->m.busreq&3)!=1) {\r
u8 *prg_bank = Pico_mcd->prg_ram_b[Pico_mcd->s68k_regs[3]>>6];\r
u16 *pm=(u16 *)(prg_bank+(a&0x1fffe));\r
pm[0]=(u16)(d>>16); pm[1]=(u16)d;\r
#endif\r
\r
\r
+// -----------------------------------------------------------------\r
+// S68k\r
// -----------------------------------------------------------------\r
\r
#ifdef _ASM_CD_MEMORY_C\r
// prg RAM\r
if (a < 0x80000) {\r
u8 *pm=(u8 *)(Pico_mcd->prg_ram+(a^1));\r
- *pm=d;\r
+ if (a >= (Pico_mcd->s68k_regs[2]<<8)) *pm=d;\r
return;\r
}\r
\r
// prg RAM\r
if (a < 0x80000) {\r
wrdprintf("s68k_prgram w16: [%06x] %04x @%06x", a, d, SekPcS68k);\r
- *(u16 *)(Pico_mcd->prg_ram+a)=d;\r
+ if (a >= (Pico_mcd->s68k_regs[2]<<8)) // needed for Dungeon Explorer\r
+ *(u16 *)(Pico_mcd->prg_ram+a)=d;\r
return;\r
}\r
\r
\r
// prg RAM\r
if (a < 0x80000) {\r
- u16 *pm=(u16 *)(Pico_mcd->prg_ram+a);\r
- pm[0]=(u16)(d>>16); pm[1]=(u16)d;\r
+ if (a >= (Pico_mcd->s68k_regs[2]<<8)) {\r
+ u16 *pm=(u16 *)(Pico_mcd->prg_ram+a);\r
+ pm[0]=(u16)(d>>16); pm[1]=(u16)d;\r
+ }\r
return;\r
}\r
\r