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32x, internal BIOS hack for jumping to 0x140

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notaz 2024-05-08 01:18:59 +02:00 • committed by kub
parent 52cb58c50d
commit 695e6de85e
1 changed files with 7 additions and 1 deletions
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8
pico/32x/memory.c
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@ -2238,10 +2238,16 @@ static void get_bios(void)
}
else {
pl = (u32 *)&Pico32xMem->sh2_rom_m;
ps = (u16 *)pl;
// fill exception vector table to our trap address
for (i = 0; i < 128; i++)
for (i = 0; i < 80; i++)
pl[i] = CPU_BE2(0x200);
// CD titles by Digital Pictures jump to 0x140 for resetting ...
for (i = 0x140/2; i < 0x1fc/2; i++)
ps[i] = 0x0009; // nop // ... so fill the remainder with nops
ps[i++] = 0xa002; // bra 0x204 // ... and jump over the trap
ps[i++] = 0x0009; // nop
// start
pl[0] = pl[2] = CPU_BE2(0x204);