Add UNIF boards...

- Add UNL-TH2131-1, UNL-LH51, BMC-RESETNROM-XIN1, BMC-RESET-TXROM
- Add FARID_SLROM_8-IN-1, BMC-830425C-4391T, BMC-TJ-03, BMC-CTC-09
- Add BMC-K-3046, BMC-SA005-A, BMC-K-3006, BMC-K-3036, MINDKIDS
- Add UNL-KS7021A, KS106C, BTL-900218
- Cleanup VRC2and4 (unify power function)

src/boards/bcmk3006.c

@@ -0,0 +1,70 @@
+/* FCEUmm - NES/Famicom Emulator
+ *
+ * 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 339 is used for a 21-in-1 multicart.
+ * Its UNIF board name is BMC-K-3006. 
+ * http://wiki.nesdev.com/w/index.php/NES_2.0_Mapper_339
+ */
+
+#include "mapinc.h"
+#include "mmc3.h"
+
+static void BMCK3006CW(uint32 A, uint8 V) {
+	setchr1(A, (V & 0x7F) | (EXPREGS[0] & 0x18) << 4);
+}
+
+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) {	/* NROM-256 */
+			setprg32(0x8000, (EXPREGS[0] >> 1) & 0x0F);
+		} else {							/* NROM-128 */
+			setprg16(0x8000, EXPREGS[0] & 0x1F);
+			setprg16(0xC000, EXPREGS[0] & 0x1F);
+		}
+	}
+}
+
+static DECLFW(BMCK3006Write) {
+	EXPREGS[0] = A & 0x3F;
+	FixMMC3PRG(MMC3_cmd);
+	FixMMC3CHR(MMC3_cmd);
+}
+
+static void BMCK3006Reset(void) {
+	EXPREGS[0] = 0;
+	MMC3RegReset();
+}
+
+static void BMCK3006Power(void) {
+	EXPREGS[0] = 0;
+	GenMMC3Power();
+	SetWriteHandler(0x6000, 0x7FFF, BMCK3006Write);
+}
+
+void BMCK3006_Init(CartInfo *info) {
+	GenMMC3_Init(info, 512, 512, 8, 0);
+	pwrap = BMCK3006PW;
+	cwrap = BMCK3006CW;
+	info->Power = BMCK3006Power;
+	info->Reset = BMCK3006Reset;
+	AddExState(EXPREGS, 1, 0, "EXPR");
+}