initial commit

2026-07-18 20:34:55 +02:00
commit 59ad004c96
474 changed files with 226635 additions and 0 deletions
@@ -0,0 +1,36 @@
+#include "mmc3.h"
+
+char mmc3_shadow;
+
+void mmc3_reset(void)
+{
+	mmc3_shadow = 0;
+}
+
+void mmc3_config(MMC3MPrgMode pmode, MMC3MChrMode cmode)
+{
+	mmc3_shadow = (pmode << 6) | (cmode << 7);
+	*(volatile char *)0x8000 = mmc3_shadow;	
+}
+
+void mmc3_bank(MMC3BankReg reg, char bank)
+{
+	*(volatile char *)0x8000 = reg | mmc3_shadow;
+	*(volatile char *)0x8001 = bank;
+}
+
+void mmc3_bank_prg(char bank)
+{
+	mmc3_bank(MMC3B_PRG0, bank * 2 + 0);
+	mmc3_bank(MMC3B_PRG1, bank * 2 + 1);
+}
+
+void mmc3_bank_chr0(char bank)
+{
+	mmc3_bank(MMC3B_CHR0, bank);
+}
+
+void mmc3_bank_chr1(char bank)
+{
+	mmc3_bank(MMC3B_CHR1, bank);
+}