From fc41466fe825eae4e5c2e2f4764482c53c687679 Mon Sep 17 00:00:00 2001
From: Peter Fors <peter.fors@mindkiller.com>
Date: Sun, 2 Nov 2025 10:15:54 +0100
Subject: add new mapper, 004_0 MMC3

---
 mappers/mapper_004_0.h | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)
 create mode 100644 mappers/mapper_004_0.h

(limited to 'mappers/mapper_004_0.h')

diff --git a/mappers/mapper_004_0.h b/mappers/mapper_004_0.h
new file mode 100644
index 0000000..227d8b8
--- /dev/null
+++ b/mappers/mapper_004_0.h
@@ -0,0 +1,17 @@
+
+
+struct mapper_004_0 {
+	uint8_t *prg_banks[4];		// 8kb banks at $8000, $a000, $c000, $e000
+	uint8_t *chr_banks[8];		// 1kb banks at $0000-$1fff
+
+	uint8_t bank_select;
+	uint8_t bank_registers[8];
+	uint8_t mirroring;
+
+	uint8_t irq_latch;
+	uint8_t irq_counter;
+	uint8_t irq_reload;
+	uint8_t irq_enabled;
+
+	uint8_t last_a12;
+} __attribute__((packed, aligned(64)));
-- 
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