57 lines
1 KiB
C
57 lines
1 KiB
C
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#pragma once
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#include "BaseMapper.h"
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class Waixing176 : public BaseMapper
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{
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private:
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bool _registersEnabled;
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protected:
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uint16_t GetPRGPageSize() { return 0x2000; }
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uint16_t GetCHRPageSize() { return 0x2000; }
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uint16_t RegisterStartAddress() { return 0x5000; }
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uint16_t RegisterEndAddress() { return 0x5FFF; }
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void InitMapper()
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{
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_registersEnabled = false;
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SelectPRGPage(0, 0);
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SelectPRGPage(1, 1);
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SelectPRGPage(2, (GetPRGPageCount() - 2) & 0x3F);
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SelectPRGPage(3, (GetPRGPageCount() - 1) & 0x3F);
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}
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void WriteRegister(uint16_t addr, uint8_t value)
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{
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switch(addr) {
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case 0x5001:
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if(_registersEnabled) {
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SelectPrgPage4x(0, value*4);
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}
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break;
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case 0x5010:
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if(value == 0x24) {
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_registersEnabled = true;
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}
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break;
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case 0x5011:
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if(_registersEnabled) {
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SelectPrgPage4x(0, (value >> 1) * 4);
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}
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break;
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case 0x5FF1:
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SelectPrgPage4x(0, (value >> 1) * 4);
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break;
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case 0x5FF2:
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if(!HasChrRam()) {
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SelectCHRPage(0, value);
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}
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break;
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}
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}
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};
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