1 files changed, 80 insertions, 0 deletions
diff --git a/helpers/mapper_add.py b/helpers/mapper_add.py
new file mode 100755
index 0000000..7092ddb
--- /dev/null
+++ b/helpers/mapper_add.py
@@ -0,0 +1,80 @@
+#!/usr/bin/env python3
+import sys
+
+def generate_mapper_files(mapper_id, submapper_id=0):
+	mapper_id = int(mapper_id)
+	submapper_id = int(submapper_id)
+
+	# Format: mapper_<decimal>_<hexsub>
+	full_id = f"{mapper_id}_{submapper_id:x}"
+	filename = f"mapper_{full_id}"
+
+	# Generate C file content
+	c_content = f"""#include "{filename}.h"
+
+static uint8_t {filename}_prg_rom_read(struct nes_state *state, uint32_t addr) {{
+	return 0;
+}}
+
+static void {filename}_prg_rom_write(struct nes_state *state, uint32_t addr, uint8_t value) {{
+}}
+
+static uint8_t {filename}_chr_read(struct nes_state *state, uint32_t addr) {{
+	return 0;
+}}
+
+static void {filename}_chr_write(struct nes_state *state, uint32_t addr, uint8_t value) {{
+}}
+
+static uint8_t {filename}_ciram_read(struct nes_state *state, uint32_t addr) {{
+	return 0;
+}}
+
+static void {filename}_ciram_write(struct nes_state *state, uint32_t addr, uint8_t value) {{
+}}
+
+static void {filename}_tick(struct nes_state *state) {{
+}}
+
+void {filename}_init(struct nes_state *state) {{
+	state->mapper.prg_rom_read = {filename}_prg_read;
+	state->mapper.prg_rom_write = {filename}_prg_rom_write;
+	state->mapper.chr_read = {filename}_chr_read;
+	state->mapper.chr_write = {filename}_chr_write;
+	state->mapper.ciram_read = {filename}_ciram_read;
+	state->mapper.ciram_write = {filename}_ciram_write;
+	state->mapper.tick = {filename}_tick;
+}}
+"""
+
+	# Generate H file content
+	h_content = f"""#pragma once
+
+struct {filename} {{
+}};
+void {filename}_init(struct nes_state *state);
+"""
+
+	# Only generate mapper ID -> init pointer
+	table_entry = f"""\t{{ 0x{mapper_id:x}, {filename}_init }},"""
+
+	# Write files
+	with open(f"{filename}.c", "w") as f:
+		f.write(c_content)
+
+	with open(f"{filename}.h", "w") as f:
+		f.write(h_content)
+
+	print(f"Generated files: {filename}.c, {filename}.h")
+	print("\nTable entry (copy-paste this into your mapper table):")
+	print(table_entry)
+
+if __name__ == "__main__":
+	if len(sys.argv) < 2:
+		print("Usage: python3 newmapper.py <mapper_id> [submapper_id=0]")
+		print("Example: python3 newmapper.py 3 0  # Creates mapper_3_0.*")
+		sys.exit(1)
+
+	mapper_id = sys.argv[1]
+	submapper_id = sys.argv[2] if len(sys.argv) > 2 else 0
+	generate_mapper_files(mapper_id, submapper_id)