Add mapper 528

2024-05-25 09:38:53 +02:00
parent fd909e1417
commit 808cc78833
6 changed files with 233 additions and 0 deletions
--- a/src/boards/528.c
+++ b/src/boards/528.c
@@ -0,0 +1,127 @@
+/* FCEUmm - NES/Famicom Emulator
+ *
+ * Copyright notice for this file:
+ *  Copyright (C) 2023
+ *
+ * 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 528 
+ * UNIF BMC-831128C
+ */
+
+#include "mapinc.h"
+#include "vrcirq.h"
+
+static uint8 preg[4], creg[8], mirr;
+static uint8 gamesel;
+static uint8 *WRAM;
+static uint32 WRAMSIZE;
+
+static SFORMAT StateRegs[] =
+{
+	{ preg, 4, "PREG" },
+	{ creg, 8, "CREG" },
+	{ &mirr, 1, "MIRR" },
+    { &gamesel, 1, "GSEL" },
+	{ 0 }
+};
+
+static void Sync(void) {
+    uint8 mask = (gamesel << 4) | 0x0F;
+	if (preg[3] == 1) {
+		setprg8r(0x10, 0x6000, 0);
+    } else {
+		setprg8(0x6000, (preg[3] & mask) + gamesel);
+    }
+	setprg8(0x8000, (preg[0] & mask) + (gamesel << 4));
+	setprg8(0xA000, (preg[1] & mask) + (gamesel << 4));
+	setprg8(0xC000, (     ~1 & mask) + (gamesel << 4));
+	setprg8(0xE000, (     ~0 & mask) + (gamesel << 4));
+	setchr1(0x0000, creg[0] + (gamesel << 8));
+    setchr1(0x0400, creg[1] + (gamesel << 8));
+    setchr1(0x0800, creg[2] + (gamesel << 8));
+    setchr1(0x0C00, creg[3] + (gamesel << 8));
+    setchr1(0x1000, creg[4] + (gamesel << 8));
+    setchr1(0x1400, creg[5] + (gamesel << 8));
+    setchr1(0x1800, creg[6] + (gamesel << 8));
+    setchr1(0x1C00, creg[7] + (gamesel << 8));
+	switch (mirr & 3) {
+		case 0: setmirror(MI_V); break;
+		case 1: setmirror(MI_H); break;
+		case 2: setmirror(MI_0); break;
+		case 3: setmirror(MI_1); break;
+	}
+}
+
+static DECLFW(M528Write1) {
+	switch (A & 0x0F) {
+	case 0x0: creg[0] = V; break;
+	case 0x1: creg[1] = V; break;
+	case 0x2: creg[2] = V; break;
+	case 0x3: creg[3] = V; break;
+	case 0x4: creg[4] = V; break;
+	case 0x5: creg[5] = V; break;
+	case 0x6: creg[6] = V; break;
+	case 0x7: creg[7] = V; break;
+	case 0x8: preg[3] = V; break;
+	case 0x9: preg[0] = V; break;
+	case 0xA: preg[1] = V; break;
+	case 0xB: break;
+	case 0xC: mirr = V & 3; break;
+	case 0xD: VRCIRQ_Control(V); break;
+	case 0xE: VRCIRQ_Acknowledge(); break;
+	case 0xF: VRCIRQ_Latch(V); break;
+	}
+	gamesel = (A & 0x4000) >> 14;
+    Sync();
+}
+
+static void M528Power(void) {
+    int i;
+    gamesel = 0;
+    preg[0] = 0;
+    preg[1] = 1;
+    preg[2] = 0;
+    preg[3] = 0;
+    for (i = 0; i < 8; i++) {
+        creg[i] = i;
+    }
+	Sync();
+
+	SetReadHandler(0x8000, 0xFFFF, CartBR);
+	SetWriteHandler(0xA000, 0xAFFF, M528Write1);
+    SetWriteHandler(0xC000, 0xCFFF, M528Write1);
+
+    SetReadHandler(0x6000, 0x7FFF, CartBR);
+    SetWriteHandler(0x6000, 0x7FFF, CartBW);
+    FCEU_CheatAddRAM(WRAMSIZE >> 10, 0x6000, WRAM);
+}
+
+static void StateRestore(int version) {
+	Sync();
+}
+
+void Mapper528_Init(CartInfo *info) {
+	info->Power = M528Power;
+	GameStateRestore = StateRestore;
+    VRCIRQ_Init();
+    AddExState(&StateRegs, ~0, 0, 0);
+
+    WRAMSIZE = 8192;
+    WRAM = (uint8*) FCEU_gmalloc(WRAMSIZE);
+    SetupCartPRGMapping(0x10, WRAM, WRAMSIZE, 1);
+    AddExState(WRAM, WRAMSIZE, 0, "WRAM");
+}