2025-06-27 00:32:57 +08:00
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#ifndef _MAPPER073_H_
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#define _MAPPER073_H_
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#include "nes_mapper.h"
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uint8 irq_enabled;
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uint32 irq_counter;
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void Mapper073_Reset()
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{
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irq_counter = 0;
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irq_enabled = 0;
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}
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void Mapper073_Write( uint8 data, uint16 addr)
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{
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switch(addr)
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{
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case 0x8000:
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{
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irq_counter = (irq_counter & 0xFFF0) | (data & 0x0F);
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}
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break;
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case 0x9000:
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{
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irq_counter = (irq_counter & 0xFF0F) | ((data & 0x0F) << 4);
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}
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break;
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case 0xA000:
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{
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irq_counter = (irq_counter & 0xF0FF) | ((data & 0x0F) << 8);
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}
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break;
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case 0xB000:
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{
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irq_counter = (irq_counter & 0x0FFF) | ((data & 0x0F) << 12);
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}
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break;
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case 0xC000:
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{
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irq_enabled = data;
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}
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break;
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case 0xF000:
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{
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// byData <<= 1;
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// byData %= ( NesHeader.byRomSize << 1 );
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// ROMBANK0 = ROMPAGE( byData );
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// ROMBANK1 = ROMPAGE( byData + 1 );
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set_cpu_bank0(data*2+0);
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set_cpu_bank1(data*2+1);
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}
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break;
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}
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}
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void Mapper073_HSync( int scanline )
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{
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if(irq_enabled & 0x02)
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{
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if(irq_counter > 0xFFFF - 114)
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{
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2025-07-05 19:47:28 +08:00
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CPU_IRQ; //cpu irq<72>жϱ<D0B6>־// parent_NES->cpu->DoIRQ(); IRQ_REQ;
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2025-06-27 00:32:57 +08:00
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irq_enabled = 0;
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}
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else
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{
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irq_counter += 114;
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}
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}
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}
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void Mapper073_Init()
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{
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NES_Mapper->Reset = Mapper073_Reset;
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NES_Mapper->Write = Mapper073_Write;
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NES_Mapper->HSync = Mapper073_HSync;
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}
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#endif
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