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BMC-411120-C/K-3088: Update PRG banking. Combine both boards

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- Both are functionally the same, only dipswitch is different.
- These boards are assigned as NES 2.0 287 mapper in wiki
This commit is contained in:
retro-wertz
2019-06-29 16:09:44 +08:00
parent 634eb688c1
commit dce349932c
2 changed files with 44 additions and 85 deletions
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50
src/boards/411120-c.c
View File

@@ -2,6 +2,7 @@
*
* Copyright notice for this file:
* Copyright (C) 2008 CaH4e3
* Copyright (C) 2019 Libretro Team
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@@ -18,25 +19,51 @@
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/* actually cart ID is 811120-C, sorry ;) K-3094 - another ID */
/* NES 2.0 Mapper 287
* BMC-411120-C, actually cart ID is 811120-C, sorry ;) K-3094 - another ID
* - 4-in-1 (411120-C)
* - 4-in-1 (811120-C,411120-C) [p4][U]
*
* BMC-K-3088, similar to BMC-411120-C but without jumper or dipswitch
* - 19-in-1(K-3088)(810849-C)(Unl)
*/
#include "mapinc.h"
#include "mmc3.h"
static uint8 reset_flag = 0;
static uint8 chip, isK3088;
static void BMC411120CCW(uint32 A, uint8 V) {
setchr1(A, V | ((EXPREGS[0] & 3) << 7));
if (CHRptr[1]) {
chip = EXPREGS[0] & 7;
if (chip > CHRchip_max) chip &= CHRchip_max;
setchr1r(chip, A, V);
} else
setchr1(A, V | ((EXPREGS[0] & 3) << 7));
}
static void BMC411120CPW(uint32 A, uint8 V) {
if (EXPREGS[0] & (8 | reset_flag))
setprg32(0x8000, ((EXPREGS[0] >> 4) & 3) | (0x0C));
else
setprg8(A, (V & 0x0F) | ((EXPREGS[0] & 3) << 4));
if (PRGptr[1]) {
chip = EXPREGS[0] & 7;
if (chip > PRGchip_max) chip &= PRGchip_max;
if (EXPREGS[0] & (isK3088 ? 8 : (8 | reset_flag))) { /* 32K Mode */
if (A == 0x8000)
setprg32r(chip, A, ((EXPREGS[0] >> 4) & 3));
} else /* MMC3 Mode */
setprg8r(chip, A, (V & 0x0F));
} else {
if (EXPREGS[0] & (isK3088 ? 8 : (8 | reset_flag))) { /* 32K Mode */
if (A == 0x8000)
/* bit 0-1 of register should be used as outer bank regardless of banking modes */
setprg32(A, ((EXPREGS[0] >> 4) & 3) | ((EXPREGS[0] & 3) << 2));
} else /* MMC3 Mode */
setprg8(A, (V & 0x0F) | ((EXPREGS[0] & 3) << 4));
}
}
static DECLFW(BMC411120CLoWrite) {
/* printf("Wr: A:%04x V:%02x\n", A, V); */
EXPREGS[0] = A;
FixMMC3PRG(MMC3_cmd);
FixMMC3CHR(MMC3_cmd);
@@ -55,6 +82,17 @@ static void BMC411120CPower(void) {
}
void BMC411120C_Init(CartInfo *info) {
isK3088 = 0;
GenMMC3_Init(info, 128, 128, 8, 0);
pwrap = BMC411120CPW;
cwrap = BMC411120CCW;
info->Power = BMC411120CPower;
info->Reset = BMC411120CReset;
AddExState(EXPREGS, 1, 0, "EXPR");
}
void BMCK3088_Init(CartInfo *info) {
isK3088 = 1;
GenMMC3_Init(info, 128, 128, 8, 0);
pwrap = BMC411120CPW;
cwrap = BMC411120CCW;

79
src/boards/bmck3088.c
View File

@@ -1,79 +0,0 @@
/* FCEUmm - NES/Famicom Emulator
*
* Copyright notice for this file:
* Copyright (C) 2019 Libretro Team
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/* NES 2.0 Mapper 287
* similar to BMC-411120-C but without jumper or dipswitch */
#include "mapinc.h"
#include "mmc3.h"
static uint8 chip;
static void BMCK3088CW(uint32 A, uint8 V) {
if (CHRptr[1]) {
chip = EXPREGS[0] & 7;
if (chip > CHRchip_max) chip &= CHRchip_max;
setchr1r(chip, A, V);
} else
setchr1(A, V | ((EXPREGS[0] & 3) << 7));
}
static void BMCK3088PW(uint32 A, uint8 V) {
if (PRGptr[1]) {
chip = EXPREGS[0] & 7;
if (chip > PRGchip_max) chip &= PRGchip_max;
if (EXPREGS[0] & 8) {
if (A == 0x8000)
setprg32r(chip, A, ((EXPREGS[0] >> 4) & 3));
} else
setprg8r(chip, A, (V & 0x0F));
} else {
if (EXPREGS[0] & 8) {
if (A == 0x8000)
setprg32(A, ((EXPREGS[0] >> 4) & 3) | (0x0C));
} else
setprg8(A, (V & 0x0F) | ((EXPREGS[0] & 3) << 4));
}
}
static DECLFW(BMCK3088LoWrite) {
EXPREGS[0] = A;
FixMMC3PRG(MMC3_cmd);
FixMMC3CHR(MMC3_cmd);
}
static void BMCK3088Reset(void) {
EXPREGS[0] = 0;
MMC3RegReset();
}
static void BMCK3088Power(void) {
GenMMC3Power();
SetWriteHandler(0x6000, 0x7FFF, BMCK3088LoWrite);
}
void BMCK3088_Init(CartInfo *info) {
GenMMC3_Init(info, 128, 128, 8, 0);
pwrap = BMCK3088PW;
cwrap = BMCK3088CW;
info->Power = BMCK3088Power;
info->Reset = BMCK3088Reset;
AddExState(EXPREGS, 1, 0, "EXPR");
}