/*
- * (C) Gražvydas "notaz" Ignotas, 2010
+ * (C) Gražvydas "notaz" Ignotas, 2010-2011
*
* This work is licensed under the terms of GNU GPL version 2 or later.
* See the COPYING file in the top-level directory.
//#define memprintf printf
#define memprintf(...)
+int pcsx_ram_is_ro;
+
static void read_mem8()
{
memprintf("ari64_read_mem8 %08x @%08x %u\n", address, psxRegs.pc, psxRegs.cycle);
extern void ari_write_ram_mirror8();
extern void ari_write_ram_mirror16();
extern void ari_write_ram_mirror32();
+extern void ari_write_ram_mirror_ro32();
extern void ari_read_bios8();
extern void ari_read_bios16();
extern void ari_read_bios32();
void (*writememb[0x10000])();
void (*writememh[0x10000])();
+static void write_biu()
+{
+ memprintf("write_biu %08x, %08x @%08x %u\n", address, word, psxRegs.pc, psxRegs.cycle);
+
+ if (address != 0xfffe0130)
+ return;
+
+ switch (word) {
+ case 0x800: case 0x804:
+ pcsx_ram_is_ro = 1;
+ break;
+ case 0: case 0x1e988:
+ pcsx_ram_is_ro = 0;
+ break;
+ default:
+ memprintf("write_biu: unexpected val: %08x\n", word);
+ break;
+ }
+}
+
/* IO handlers */
static u32 io_read_sio16()
{
writemem[i] = writemem [0x8000|i] = writemem [0xa000|i] = ari_write_ram_mirror32;
}
+ // stupid BIOS RAM check
+ writemem[0] = ari_write_ram_mirror_ro32;
+ pcsx_ram_is_ro = 0;
+
// RAM direct
for (i = 0x8000; i < 0x8020; i++) {
readmemb[i] = ari_read_ram8;
readmemh[i] = ari_read_ram16;
readmem[i] = ari_read_ram32;
- writememb[i] = ari_write_ram8;
- writememh[i] = ari_write_ram16;
- writemem[i] = ari_write_ram32;
}
// BIOS and it's mirrors
writememh[0x1f80] = ari_write_io16;
writemem[0x1f80] = ari_write_io32;
- writemem[0xfffe] = write_mem32;
+ writemem[0xfffe] = write_biu;
#endif
// fill IO tables