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Mapper 339: Add submappers 2 and 3, solder pad menu selection

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NewRisingSun
2025-09-09 22:23:59 +02:00
parent 6cb168cce3
commit f47947dae8
1 changed files with 17 additions and 7 deletions
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24
src/boards/bmck3006.c
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@@ -26,7 +26,11 @@
#include "mapinc.h"
#include "mmc3.h"
static uint8 submapper;
static uint8 submapper; // 0: K-3006, 1: unmarked, 2: TL 8058, 3: K-3091/GN-16
static DECLFR (readPad) {
return CartBR(A &~3 | EXPREGS[2] &3);
}
static void BMCK3006CW(uint32 A, uint8 V) {
setchr1(A, (V & 0x7F) | (EXPREGS[0] & 0x18) << 4);
@@ -36,9 +40,12 @@ static void BMCK3006PW(uint32 A, uint8 V) {
if (EXPREGS[0] & 0x20) { /* MMC3 mode */
setprg8(A, (V & 0x0F) | (EXPREGS[0] & 0x18) << 1);
} else {
if ((EXPREGS[0] & 0x07) == 0x06 && submapper ==0 || EXPREGS[0] &4 && submapper ==1) { /* NROM-256 */
if (submapper ==0 && (EXPREGS[0] & 0x06) == 0x06 ||
submapper ==1 && EXPREGS[0] &4 ||
submapper ==2 && (EXPREGS[0] &1 || EXPREGS[1] &1) ||
submapper ==3 && EXPREGS[0] &0x18) { /* NROM-256 */
setprg32(0x8000, (EXPREGS[0] >> 1) & 0x0F);
} else { /* NROM-128 */
} else { /* NROM-128 */
setprg16(0x8000, EXPREGS[0] & 0x1F);
setprg16(0xC000, EXPREGS[0] & 0x1F);
}
@@ -46,18 +53,21 @@ static void BMCK3006PW(uint32 A, uint8 V) {
}
static DECLFW(BMCK3006Write) {
EXPREGS[0] = A & 0x3F;
EXPREGS[0] = A &0xFF;
EXPREGS[1] = A >>8 &0xFF;
FixMMC3PRG(MMC3_cmd);
FixMMC3CHR(MMC3_cmd);
if (submapper == 2 || submapper == 3) SetReadHandler(0x8000, 0xFFFF, EXPREGS[0] &0x80? readPad: CartBR);
}
static void BMCK3006Reset(void) {
EXPREGS[0] = 0;
EXPREGS[0] = EXPREGS[1] = 0;
EXPREGS[2]++;
MMC3RegReset();
}
static void BMCK3006Power(void) {
EXPREGS[0] = 0;
EXPREGS[0] = EXPREGS[1] = EXPREGS[2] = 0;
GenMMC3Power();
SetWriteHandler(0x6000, 0x7FFF, BMCK3006Write);
}
@@ -69,5 +79,5 @@ void BMCK3006_Init(CartInfo *info) {
cwrap = BMCK3006CW;
info->Power = BMCK3006Power;
info->Reset = BMCK3006Reset;
AddExState(EXPREGS, 1, 0, "EXPR");
AddExState(EXPREGS, 3, 0, "EXPR");
}