ShuriZma
/
fceux
mirror of https://github.com/TASEmulators/fceux.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

Fixes for COOLBOY mapper, added MINDKIDS mapper (alternative COOLBOY)

This commit is contained in:
Alexey 'Cluster' Avdyukhin 2018-08-30 19:10:10 +03:00
parent 21c09717c4
commit 388e10b473
3 changed files with 75 additions and 23 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

96
src/boards/coolboy.cpp
View File

@ -1,7 +1,7 @@
/* FCE Ultra - NES/Famicom Emulator
*
* Copyright notice for this file:
* Copyright (C) 2015 CaH4e3, ClusteR
* Copyright (C) 2018 CaH4e3, Cluster
*
* 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
@ -17,15 +17,61 @@
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* CoolBoy 400-in-1 FK23C-mimic mapper 16Mb/32Mb PROM + 128K/256K CHR RAM, optional SRAM, optional NTRAM
* CoolBoy 400-in-1 FK23C-mimic mapper 16Mb/32Mb PROM + 128K/256K CHR RAM, optional SRAM, optional battery
* only MMC3 mode
*
* 6000 (xx76x210) | 0xC0
* 6001 (xxx354x)
* 6002 = 0
* 6003 = 0
* $6000
* 7 bit 0
* ---- ----
* ABCC DEEE
* |||| ||||
* |||| |+++-- PRG offset (PRG A19, A18, A17)
* |||| +----- Alternate CHR A17
* ||++------- PRG offset (PRG A24, A23)
* |+--------- PRG mask (PRG A17 from 0: MMC3; 1: offset)
* +---------- CHR mask (CHR A17 from 0: MMC3; 1: alternate)
*
* $6001
*
* 7 bit 0
* ---- ----
* GHIJ KKLx
* |||| |||
* |||| ||+--- GNROM mode bank PRG size (1: 32 KiB bank, PRG A14=CPU A14; 0: 16 KiB bank, PRG A14=offset A14)
* |||+-++---- PRG offset (in order: PRG A20, A22, A21)
* ||+-------- PRG mask (PRG A20 from 0: offset; 1: MMC3)
* |+--------- PRG mask (PRG A19 from 0: offset; 1: MMC3)
* +---------- PRG mask (PRG A18 from 0: MMC3; 1: offset)
*
* $6002
* 7 bit 0
* ---- ----
* xxxx MMMM
* ||||
* ++++-- CHR offset for GNROM mode (CHR A16, A15, A14, A13)
*
* $6003
* 7 bit 0
* ---- ----
* NPxP QQRx
* || | |||
* || | +++--- PRG offset for GNROM mode (PRG A16, A15, A14)
* || +------- 1: GNROM mode; 0: MMC3 mode
* || | (1: PRG A16...13 from QQ, L, R, CPU A14, A13 + CHR A16...10 from MMMM, PPU A12...10;
* || | 0: PRG A16...13 from MMC3 + CHR A16...A10 from MMC3 )
* |+-+------- Banking mode
* |+--------- "Weird MMC3 mode"
* +---------- Lockout (prevent further writes to these four registers, only works in MMC3 mode)
*
* There is also alternative version from MINDKIDS,
* the only difference is register addresses - 500x instead of 600x
*
* Also some new cartridges from MINDKIDS have /WE and /OE pins connected to mapper,
* which allows you to rewrite flash memory without soldering.
* This also allows console to write data to the cartridge.
* This behavior is not emulated.
* No cart has been discovered so far that makes use of this feature, but this can be used for homebrew.
*
* hardware tested logic, don't try to understand lol
*/
#include "mapinc.h"
@ -71,12 +117,7 @@ static void COOLBOYPW(uint32 A, uint8 V) {
// Last banks are first in this mode, ignored when MMC3_cmd&0x40
if ((EXPREGS[3] & 0x40) && (V >= 0xFE) && !((MMC3_cmd & 0x40) != 0)) {
switch (A & 0xE000) {
case 0xA000:
if ((MMC3_cmd & 0x40)) V = 0;
break;
case 0xC000:
if (!(MMC3_cmd & 0x40)) V = 0;
break;
case 0xE000:
V = 0;
break;
@ -115,10 +156,6 @@ static DECLFW(COOLBOYWrite) {
static void COOLBOYReset(void) {
MMC3RegReset();
EXPREGS[0] = EXPREGS[1] = EXPREGS[2] = EXPREGS[3] = 0;
// EXPREGS[0] = 0;
// EXPREGS[1] = 0x60;
// EXPREGS[2] = 0;
// EXPREGS[3] = 0;
FixMMC3PRG(MMC3_cmd);
FixMMC3CHR(MMC3_cmd);
}
@ -126,21 +163,34 @@ static void COOLBOYReset(void) {
static void COOLBOYPower(void) {
GenMMC3Power();
EXPREGS[0] = EXPREGS[1] = EXPREGS[2] = EXPREGS[3] = 0;
// EXPREGS[0] = 0;
// EXPREGS[1] = 0x60;
// EXPREGS[2] = 0;
// EXPREGS[3] = 0;
FixMMC3PRG(MMC3_cmd);
FixMMC3CHR(MMC3_cmd);
SetWriteHandler(0x5000, 0x5fff, CartBW); // some games access random unmapped areas and crashes because of KT-008 PCB hack in MMC3 source lol
SetWriteHandler(0x6000, 0x7fff, COOLBOYWrite);
SetWriteHandler(0x6000, 0x6fff, COOLBOYWrite);
}
static void MINDKIDSPower(void) {
GenMMC3Power();
EXPREGS[0] = EXPREGS[1] = EXPREGS[2] = EXPREGS[3] = 0;
FixMMC3PRG(MMC3_cmd);
FixMMC3CHR(MMC3_cmd);
SetWriteHandler(0x5000, 0x5fff, COOLBOYWrite);
}
void COOLBOY_Init(CartInfo *info) {
GenMMC3_Init(info, 512, 256, 8, 0);
GenMMC3_Init(info, 2048, 256, 8, 1);
pwrap = COOLBOYPW;
cwrap = COOLBOYCW;
info->Power = COOLBOYPower;
info->Reset = COOLBOYReset;
AddExState(EXPREGS, 4, 0, "EXPR");
}
}
void MINDKIDS_Init(CartInfo *info) {
GenMMC3_Init(info, 2048, 256, 8, 1);
pwrap = COOLBOYPW;
cwrap = COOLBOYCW;
info->Power = MINDKIDSPower;
info->Reset = COOLBOYReset;
AddExState(EXPREGS, 4, 0, "EXPR");
}

1
src/unif.cpp
View File

@ -471,6 +471,7 @@ static BMAPPING bmap[] = {
{ "8-IN-1", BMC8IN1_Init, 0 },
{ "80013-B", BMC80013B_Init, 0 },
{ "HPxx", BMCHPxx_Init, 0 },
{ "MINDKIDS", MINDKIDS_Init, BMCFLAG_256KCHRR },
{ 0, 0, 0 }
};

1
src/unif.h
View File

@ -158,6 +158,7 @@ void BMC810131C_Init(CartInfo *info);
void BMC8IN1_Init(CartInfo *info);
void BMC80013B_Init(CartInfo *info);
void BMCHPxx_Init(CartInfo *info);
void MINDKIDS_Init(CartInfo *info);
extern uint8 *UNIFchrrama; // Meh. So I can stop CHR RAM
// bank switcherooing with certain boards...