From 46d0f6aeb1588b85852487e581a8b4c9c2401646 Mon Sep 17 00:00:00 2001
From: Peter Fors <peter.fors@mindkiller.com>
Date: Sun, 2 Nov 2025 13:54:50 +0100
Subject: Add MMC5, not in a working state, but can start castlevania iii, this
 is a horrible mapper to implement.

---
 mappers/mapper_005_0.h | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)
 create mode 100644 mappers/mapper_005_0.h

(limited to 'mappers/mapper_005_0.h')

diff --git a/mappers/mapper_005_0.h b/mappers/mapper_005_0.h
new file mode 100644
index 0000000..f9b9851
--- /dev/null
+++ b/mappers/mapper_005_0.h
@@ -0,0 +1,27 @@
+
+
+struct mapper_005_0 {
+	uint8_t *prg_banks[5];		// banks at $6000, $8000, $a000, $c000, $e000
+	uint8_t *chr_banks_bg[8];	// 1kb banks at $0000-$1fff for background
+	uint8_t *chr_banks_sp[8];	// 1kb banks at $0000-$1fff for sprites
+
+	uint8_t prg_mode;
+	uint8_t chr_mode;
+	uint8_t prg_bank_regs[5];		// $5113-$5117
+	uint8_t chr_bank_regs[12];		// $5120-$512b (0-7=bg, 8-11=sprites)
+	uint8_t chr_upper;				// $5130
+
+	uint8_t nametable_mapping;		// $5105
+	uint8_t fill_tile;				// $5106
+	uint8_t fill_attr;				// $5107
+
+	uint8_t exram_mode;
+	uint8_t exram[1024];
+
+	uint8_t irq_scanline;			// $5203
+	uint8_t irq_status;				// $5204
+	uint8_t irq_pending;
+
+	uint8_t in_frame;
+	uint16_t scanline_counter;
+} __attribute__((packed, aligned(64)));
-- 
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