239 lines
7.7 KiB
C#
239 lines
7.7 KiB
C#
//////////////////////////////////////////////////////////////////////////
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// Mapper163 NanJing Games //
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//////////////////////////////////////////////////////////////////////////
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using System;
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using static VirtualNes.MMU;
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using BYTE = System.Byte;
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using INT = System.Int32;
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namespace VirtualNes.Core
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{
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public class Mapper163 : Mapper
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{
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//BYTE strobe;
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//BYTE security;
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//BYTE trigger;
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//BYTE rom_type;
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//BYTE reg[2];
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BYTE[] reg = new byte[3];
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BYTE strobe, trigger;
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ushort security;
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BYTE rom_type;
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INT www, index;
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public Mapper163(NES parent) : base(parent)
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{
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}
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static Int32[] index_adjust = new Int32[] { -1, -1, -1, -1, 2, 4, 6, 8 };
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static Int16[] step_table = new Int16[] {
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7,8,9,10,11,12,13,14,16,17,19,21,23,25,28,31,34,37,41,45,50,55,
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60,66,73,80,88,97,107,118,130,143,157,173,190,209,230,253,279,
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307,337,371,408,449,494,544,598,658,724,796,876,963,1060,
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1166,1282,1411,1552,1707,1878,2066,2272,2499,2749,3024,3327,
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3660,4026,4428,4871,5358,5894,6484,7132,7845,8630,9493,10442,
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11487,12635,13899,15289,16818,18500,20350,22385,24623,27086,29794,32767
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};
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BYTE adpcm_decoder(BYTE data)
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{
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int sb, delta;
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int cur_sample = 0;
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if ((data & 8) != 0) sb = 1; else sb = 0;
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data &= 7;
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delta = (step_table[index] * data) / 4 + step_table[index] / 8;
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if (sb == 1) delta = -delta;
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cur_sample += delta;
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if (cur_sample > 32767) cur_sample = 32767;
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else if (cur_sample < -32768) cur_sample = -32768;
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else cur_sample = cur_sample;
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index += index_adjust[data];
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if (index < 0) index = 0;
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if (index > 88) index = 88;
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return (byte)(cur_sample & 0xff);
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}
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//void Mapper163::Reset()
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public override void Reset()
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{
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index = 0;
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reg[1] = 0xFF;
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strobe = 1;
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security = trigger = reg[0] = 0x00;
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rom_type = 0;
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SetPROM_32K_Bank(15);
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// jedi_table_init();
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uint crc = nes.rom.GetPROM_CRC();
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if (crc == 0xb6a10d5d)
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{ // Hu Lu Jin Gang (NJ039) (Ch) [dump]
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SetPROM_32K_Bank(0);
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}
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if (crc == 0xf52468e7 // San Guo Wu Shuang - Meng Jiang Zhuan (NJ047) (Ch) [dump]
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|| crc == 0x696D98E3)
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{ // San Guo Zhi Lv Bu Zhuan (NJ040) (Ch) [dump]
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rom_type = 1;
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}
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if (crc == 0xEFF96E8A)
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{ // Mo Shou Shi Jie E Mo Lie Ren (NJ097) (Ch) [dump]
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rom_type = 2;
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}
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www = 0;
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}
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///BYTE Mapper163::ReadLow(WORD addr)
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public override byte ReadLow(ushort addr)
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{
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// DEBUGOUT( "ReadLow - addr= %04x\n", addr );
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if ((addr >= 0x5000 && addr < 0x6000))
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{
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switch (addr & 0x7700)
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{
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case 0x5100:
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return (byte)security;
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break;
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case 0x5500:
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if (trigger != 0)
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return (byte)security;
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else
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return 0;
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break;
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}
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return 4;
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}
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else if (addr >= 0x6000)
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{
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return CPU_MEM_BANK[addr >> 13][addr & 0x1FFF];
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}
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return base.ReadLow(addr);
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}
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//void Mapper163::WriteLow(WORD addr, BYTE data)
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public override void WriteLow(ushort addr, byte data)
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{
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// if(addr==0x5200) DEBUGOUT( "WriteLow - addr= %04x ; dat= %03x\n", addr, data );
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if ((addr >= 0x4020 && addr < 0x6000))
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{
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if (addr == 0x5101)
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{
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if (strobe != 0 && data == 0)
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{
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trigger ^= 1;
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// trigger ^= 0xFF;
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}
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strobe = data;
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}
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else if (addr == 0x5100 && data == 6)
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{
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SetPROM_32K_Bank(3);
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}
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else
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{
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switch (addr & 0x7300)
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{
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case 0x5000:
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reg[1] = data;
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SetPROM_32K_Bank((reg[1] & 0xF) | (reg[0] << 4));
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if ((reg[1] & 0x80) == 0 && (nes.ppu.GetScanlineNo() < 128))
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SetCRAM_8K_Bank(0);
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if (rom_type == 1) SetCRAM_8K_Bank(0);
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break;
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case 0x5100:
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reg[2] = data;
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// nes.apu.Write(0x4011,(decode(reg[0]&0xf)<<3));
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break;
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case 0x5200:
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reg[0] = data;
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SetPROM_32K_Bank((reg[1] & 0xF) | (reg[0] << 4));
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break;
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case 0x5300:
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security = data;
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break;
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}
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}
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}
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else if (addr >= 0x6000)
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{
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CPU_MEM_BANK[addr >> 13][addr & 0x1FFF] = data;
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if ((addr >= 0x7900 && addr <= 0x79FF))
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{
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// WAVRAM[addr&0xFF] = data;
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// if(addr==0x79FF){
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// memcpy( YWRAM+(www*256), WAVRAM, 256);
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// www++;
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// }
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// nes.apu.Write(0x4011,(adpcm_decoder(data)));
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nes.apu.Write(0x4011, data);
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}
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}
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}
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//void Mapper163::Write(WORD addr, BYTE data)
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public override void Write(ushort addr, byte data)
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{
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// DEBUGOUT( "Write - addr= %04x ; dat= %03x\n", addr, data );
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}
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//void Mapper163::HSync(int scanline)
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public override void HSync(int scanline)
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{
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if ((reg[1] & 0x80) != 0 && nes.ppu.IsDispON())
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{
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if (scanline == 127)
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{
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SetCRAM_4K_Bank(0, 1);
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SetCRAM_4K_Bank(4, 1);
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}
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if (rom_type == 1)
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{
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if (scanline < 127)
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{
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SetCRAM_4K_Bank(0, 0);
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SetCRAM_4K_Bank(4, 0);
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}
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}
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else
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{
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if (scanline == 239)
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{
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SetCRAM_4K_Bank(0, 0);
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SetCRAM_4K_Bank(4, 0);
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if (rom_type == 2) SetCRAM_4K_Bank(4, 1);
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}
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}
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}
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}
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///void Mapper163::PPU_Latch(WORD addr)
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//{
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// if (DirectInput.m_Sw[DIK_PAUSE])
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// {
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// nes.Dump_YWRAM();
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// }
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//}
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//void Mapper163::SaveState(LPBYTE p)
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public override void SaveState(byte[] p)
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{
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p[0] = reg[0];
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p[1] = reg[1];
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}
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//void Mapper163::LoadState(LPBYTE p)
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public override void LoadState(byte[] p)
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{
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reg[0] = p[0];
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reg[1] = p[1];
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}
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}
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}
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