initial commit

2026-07-18 20:34:55 +02:00
commit 59ad004c96
474 changed files with 226635 additions and 0 deletions
@@ -0,0 +1,60 @@
+#include "mmc1.h"
+
+
+void mmc1_reset(void)
+{
+	*(volatile char *)0x8000 = 0x80;
+}
+
+void mmc1_config(MMC1Mirror mirror, MMC1MPrgMode pmode, MMC1MChrMode cmode)
+{
+	char reg = mirror | (pmode << 2) | (cmode << 4);
+	*(volatile char *)0x8000 = reg;
+	reg >>= 1;
+	*(volatile char *)0x8000 = reg;
+	reg >>= 1;
+	*(volatile char *)0x8000 = reg;
+	reg >>= 1;
+	*(volatile char *)0x8000 = reg;
+	reg >>= 1;
+	*(volatile char *)0x8000 = reg;
+}
+
+void mmc1_bank_prg(char bank)
+{
+	*(volatile char *)0xe000 = bank;
+	bank >>= 1;
+	*(volatile char *)0xe000 = bank;
+	bank >>= 1;
+	*(volatile char *)0xe000 = bank;
+	bank >>= 1;
+	*(volatile char *)0xe000 = bank;
+	bank >>= 1;
+	*(volatile char *)0xe000 = bank;
+}
+
+void mmc1_bank_chr0(char bank)
+{
+	*(volatile char *)0xa000 = bank;
+	bank >>= 1;
+	*(volatile char *)0xa000 = bank;
+	bank >>= 1;
+	*(volatile char *)0xa000 = bank;
+	bank >>= 1;
+	*(volatile char *)0xa000 = bank;
+	bank >>= 1;
+	*(volatile char *)0xa000 = bank;
+}
+
+void mmc1_bank_chr1(char bank)
+{
+	*(volatile char *)0xc000 = bank;
+	bank >>= 1;
+	*(volatile char *)0xc000 = bank;
+	bank >>= 1;
+	*(volatile char *)0xc000 = bank;
+	bank >>= 1;
+	*(volatile char *)0xc000 = bank;
+	bank >>= 1;
+	*(volatile char *)0xc000 = bank;
+}