83 lines
1.9 KiB
C#
83 lines
1.9 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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namespace BizHawk.Emulation.Consoles.Intellivision
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{
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public sealed partial class Intellivision
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{
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private ushort[] STIC_Registers;
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private ushort[] Scratchpad_RAM;
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private ushort[] PSG_Registers;
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private ushort[] System_RAM;
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private ushort[] Executive_ROM;
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private ushort[] Graphics_ROM;
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private ushort[] Graphics_RAM;
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public ushort ReadMemory(ushort addr)
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{
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switch (addr & 0xF000)
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{
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case 0x0000:
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if (addr >= 0x0100 && addr <= 0x01EF)
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return Scratchpad_RAM[addr];
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if (addr >= 0x01F0 && addr <= 0x01FF)
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return PSG_Registers[addr];
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if (addr >= 0x0200 && addr <= 0x035F)
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return System_RAM[addr];
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break;
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case 0x1000:
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return Executive_ROM[addr];
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case 0x3000:
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if (addr >= 0x3000 && addr <= 0x37FF)
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return Graphics_ROM[addr];
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if (addr >= 0x3800 && addr <= 0x39FF)
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return Graphics_RAM[addr];
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break;
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}
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throw new NotImplementedException();
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}
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public void WriteMemory(ushort addr, ushort value)
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{
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switch (addr & 0xF000)
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{
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case 0x0000:
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if (addr >= 0x0100 && addr <= 0x01EF)
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{
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Scratchpad_RAM[addr] = value;
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return;
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}
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if (addr >= 0x01F0 && addr <= 0x01FF)
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{
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PSG_Registers[addr] = value;
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return;
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}
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if (addr >= 0x0200 && addr <= 0x035F)
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{
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System_RAM[addr] = value;
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return;
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}
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break;
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case 0x1000:
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Executive_ROM[addr] = value;
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return;
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case 0x3000:
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if (addr >= 0x3000 && addr <= 0x37FF)
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{
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Graphics_ROM[addr] = value;
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return;
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}
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if (addr >= 0x3800 && addr <= 0x39FF)
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{
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Graphics_RAM[addr] = value;
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return;
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}
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break;
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}
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throw new NotImplementedException();
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}
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}
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}
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