61 lines
1.2 KiB
C
61 lines
1.2 KiB
C
#include "mmc1.h"
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void mmc1_reset(void)
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{
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*(volatile char *)0x8000 = 0x80;
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}
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void mmc1_config(MMC1Mirror mirror, MMC1MPrgMode pmode, MMC1MChrMode cmode)
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{
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char reg = mirror | (pmode << 2) | (cmode << 4);
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*(volatile char *)0x8000 = reg;
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reg >>= 1;
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*(volatile char *)0x8000 = reg;
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reg >>= 1;
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*(volatile char *)0x8000 = reg;
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reg >>= 1;
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*(volatile char *)0x8000 = reg;
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reg >>= 1;
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*(volatile char *)0x8000 = reg;
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}
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void mmc1_bank_prg(char bank)
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{
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*(volatile char *)0xe000 = bank;
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bank >>= 1;
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*(volatile char *)0xe000 = bank;
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bank >>= 1;
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*(volatile char *)0xe000 = bank;
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bank >>= 1;
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*(volatile char *)0xe000 = bank;
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bank >>= 1;
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*(volatile char *)0xe000 = bank;
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}
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void mmc1_bank_chr0(char bank)
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{
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*(volatile char *)0xa000 = bank;
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bank >>= 1;
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*(volatile char *)0xa000 = bank;
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bank >>= 1;
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*(volatile char *)0xa000 = bank;
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bank >>= 1;
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*(volatile char *)0xa000 = bank;
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bank >>= 1;
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*(volatile char *)0xa000 = bank;
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}
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void mmc1_bank_chr1(char bank)
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{
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*(volatile char *)0xc000 = bank;
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bank >>= 1;
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*(volatile char *)0xc000 = bank;
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bank >>= 1;
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*(volatile char *)0xc000 = bank;
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bank >>= 1;
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*(volatile char *)0xc000 = bank;
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bank >>= 1;
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*(volatile char *)0xc000 = bank;
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}
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