admin/ci-libretro-fceumm
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Mapper 314: Add support for 4 MiB variant.

Browse Source
This commit is contained in:
NewRisingSun
2025-09-08 16:37:15 +02:00
parent da42e08e1a
commit 03c7199a42
1 changed files with 7 additions and 9 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
src/boards/bmc64in1nr.c
View File

@@ -31,17 +31,17 @@ static SFORMAT StateRegs[] =
}; };
static void Sync(void) { static void Sync(void) {
int prg = regs[0] <<7 &0x80 | regs[1] <<1 &0x7E | regs[1] >>6 &0x01;
if (regs[0] & 0x80) { /* NROM mode */ if (regs[0] & 0x80) { /* NROM mode */
if (regs[1] & 0x80) if (regs[1] & 0x80)
setprg32(0x8000, regs[1] & 0x3F); setprg32(0x8000, prg >>1);
else { else {
int bank = ((regs[1] & 0x3F) << 1) | ((regs[1] >> 6) & 1); setprg16(0x8000, prg);
setprg16(0x8000, bank); setprg16(0xC000, prg);
setprg16(0xC000, bank);
} }
} else { /* UNROM mode */ } else { /* UNROM mode */
setprg16(0x8000, regs[1] <<1 | regs[3] &7); setprg16(0x8000, prg &~7 | regs[3] &7);
setprg16(0xC000, regs[1] <<1 | 7); setprg16(0xC000, prg | 7);
} }
if (regs[0] & 0x20) if (regs[0] & 0x20)
setmirror(MI_H); setmirror(MI_H);
@@ -51,9 +51,7 @@ static void Sync(void) {
} }
static DECLFW(BMC64in1nrWriteLo) { static DECLFW(BMC64in1nrWriteLo) {
A &=3; regs[A &(VROM_size? 3: 1)] = V;
if (A ==3) A =1; /* K-42001's "Aladdin III" */
regs[A & 3] = V;
Sync(); Sync();
} }