85 lines
2.7 KiB
C#
85 lines
2.7 KiB
C#
using System;
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namespace BizHawk.Emulation.Consoles.TurboGrafx
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{
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public partial class PCEngine
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{
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private byte[] CdIoPorts = new byte[16];
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private void WriteCD(int addr, byte value)
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{
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switch (addr & 0x1FFF)
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{
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case 0x1802: // ADPCM / CD Control
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CdIoPorts[2] = value;
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break;
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case 0x1804: // CD Reset Command
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CdIoPorts[4] = value;
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break;
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case 0x1807: // BRAM Unlock
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if (BramEnabled && (value & 0x80) != 0)
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{
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Console.WriteLine("UNLOCK BRAM!");
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BramLocked = false;
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}
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break;
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case 0x180B: // ADPCM DMA Control
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CdIoPorts[0x0B] = value;
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Console.WriteLine("Write to ADPCM DMA Control [B]");
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// TODO... there is DMA to be done
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break;
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case 0x180D: // ADPCM Address Control
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CdIoPorts[0x0D] = value;
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Console.WriteLine("Write to ADPCM Address Control [D]");
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break;
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case 0x180E: // ADPCM Playback Rate
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CdIoPorts[0x0E] = value;
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Console.WriteLine("Write to ADPCM Address Control [E]");
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break;
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case 0x180F: // Audio Fade Timer
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CdIoPorts[0x0F] = value;
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Console.WriteLine("Write to CD Audio fade timer [F]");
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// TODO: hook this up to audio system);
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break;
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default:
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Console.WriteLine("unknown write to {0:X4}:{1:X2}",addr, value);
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break;
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}
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}
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public byte ReadCD(int addr)
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{
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switch (addr & 0x1FFF)
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{
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case 0x1802: // ADPCM / CD Control
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return CdIoPorts[2];
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case 0x1803: // BRAM Lock
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if (BramEnabled)
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{
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Console.WriteLine("LOCKED BRAM!");
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BramLocked = true;
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}
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return CdIoPorts[3];
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case 0x1804: // CD Reset
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return CdIoPorts[4];
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case 0x180F: // Audio Fade Timer
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return CdIoPorts[0x0F];
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default:
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Console.WriteLine("unknown read to {0:X4}", addr);
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return 0xFF;
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}
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}
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}
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}
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