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.net 9 gb analysis changes

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This commit is contained in:
Adrian Conlon
2024-10-12 12:57:38 +01:00
parent 4839f3fc04
commit b38462bddf
11 changed files with 192 additions and 268 deletions
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LR35902/Bus.cs
+42 -41
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@@ -3,6 +3,7 @@
// </copyright>
namespace EightBit.GameBoy
{
using LR35902;
using System;
using System.Collections.Generic;
@@ -15,13 +16,13 @@ namespace EightBit.GameBoy
public const int CyclesPerLine = CyclesPerFrame / TotalLineCount;
public const int RomPageSize = 0x4000;
private readonly Rom bootRom = new Rom(0x100); // 0x0000 - 0x00ff
private readonly List<Rom> gameRomBanks = new List<Rom>(); // 0x0000 - 0x3fff, 0x4000 - 0x7fff (switchable)
private readonly List<Ram> ramBanks = new List<Ram>(); // 0xa000 - 0xbfff (switchable)
private readonly UnusedMemory unmapped2000 = new UnusedMemory(0x2000, 0xff); // 0xa000 - 0xbfff
private readonly Ram lowInternalRam = new Ram(0x2000); // 0xc000 - 0xdfff (mirrored at 0xe000)
private readonly UnusedMemory unmapped60 = new UnusedMemory(0x60, 0xff); // 0xfea0 - 0xfeff
private readonly Ram highInternalRam = new Ram(0x80); // 0xff80 - 0xffff
private readonly Rom bootRom = new(0x100); // 0x0000 - 0x00ff
private readonly List<Rom> gameRomBanks = new(); // 0x0000 - 0x3fff, 0x4000 - 0x7fff (switchable)
private readonly List<Ram> ramBanks = new(); // 0xa000 - 0xbfff (switchable)
private readonly UnusedMemory unmapped2000 = new(0x2000, 0xff); // 0xa000 - 0xbfff
private readonly Ram lowInternalRam = new(0x2000); // 0xc000 - 0xdfff (mirrored at 0xe000)
private readonly UnusedMemory unmapped60 = new(0x60, 0xff); // 0xfea0 - 0xfeff
private readonly Ram highInternalRam = new(0x80); // 0xff80 - 0xffff
private bool enabledLCD = false;
@@ -240,20 +241,20 @@ namespace EightBit.GameBoy
// ROM type
switch (this.gameRomBanks[0].Peek(0x147))
{
case (byte)CartridgeType.ROM:
this.rom = true;
break;
case (byte)CartridgeType.ROM_MBC1:
this.rom = this.banked = true;
break;
case (byte)CartridgeType.ROM_MBC1_RAM:
this.rom = this.banked = this.ram = true;
break;
case (byte)CartridgeType.ROM_MBC1_RAM_BATTERY:
this.rom = this.banked = this.ram = this.battery = true;
break;
default:
throw new InvalidOperationException("Unhandled cartridge ROM type");
case (byte)CartridgeType.ROM:
this.rom = true;
break;
case (byte)CartridgeType.ROM_MBC1:
this.rom = this.banked = true;
break;
case (byte)CartridgeType.ROM_MBC1_RAM:
this.rom = this.banked = this.ram = true;
break;
case (byte)CartridgeType.ROM_MBC1_RAM_BATTERY:
this.rom = this.banked = this.ram = this.battery = true;
break;
default:
throw new InvalidOperationException("Unhandled cartridge ROM type");
}
// ROM size
@@ -262,28 +263,28 @@ namespace EightBit.GameBoy
var romSizeSpecification = this.Peek(0x148);
switch (romSizeSpecification)
{
case 0x52:
gameRomBanks = 72;
break;
case 0x53:
gameRomBanks = 80;
break;
case 0x54:
gameRomBanks = 96;
break;
default:
if (romSizeSpecification > 6)
{
throw new InvalidOperationException("Invalid ROM size specification");
}
case 0x52:
gameRomBanks = 72;
break;
case 0x53:
gameRomBanks = 80;
break;
case 0x54:
gameRomBanks = 96;
break;
default:
if (romSizeSpecification > 6)
{
throw new InvalidOperationException("Invalid ROM size specification");
}
gameRomBanks = 1 << (romSizeSpecification + 1);
if (gameRomBanks != this.gameRomBanks.Count)
{
throw new InvalidOperationException("ROM size specification mismatch");
}
gameRomBanks = 1 << (romSizeSpecification + 1);
if (gameRomBanks != this.gameRomBanks.Count)
{
throw new InvalidOperationException("ROM size specification mismatch");
}
break;
break;
}
// RAM size