72 lines
2.4 KiB
C#
72 lines
2.4 KiB
C#
using System;
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using System.Globalization;
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using System.Text;
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namespace Chip8.Core;
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public sealed class MachineSnapshot
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{
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public ushort pc { get; init; }
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public ushort i { get; init; }
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public byte sp { get; init; }
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public byte delayTimer { get; init; }
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public byte soundTimer { get; init; }
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public int planeMask { get; init; }
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public bool hires { get; init; }
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public bool exited { get; init; }
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public byte[] v { get; init; } = Array.Empty<byte>();
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public ushort[] stack { get; init; } = Array.Empty<ushort>();
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public static MachineSnapshot capture(Machine machine)
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{
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var stackFrames = new ushort[machine.sp];
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Array.Copy(machine.stack, stackFrames, machine.sp);
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return new MachineSnapshot
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{
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pc = machine.pc,
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i = machine.i,
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sp = machine.sp,
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delayTimer = machine.delayTimer,
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soundTimer = machine.soundTimer,
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planeMask = machine.planeMask,
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hires = machine.hires,
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exited = machine.exited,
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v = (byte[])machine.v.Clone(),
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stack = stackFrames,
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};
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}
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public string format()
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{
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var builder = new StringBuilder();
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builder.Append("PC=0x").Append(pc.ToString("X4", CultureInfo.InvariantCulture));
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builder.Append(" I=0x").Append(i.ToString("X4", CultureInfo.InvariantCulture));
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builder.Append(" SP=").Append(sp);
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builder.Append(" DT=").Append(delayTimer);
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builder.Append(" ST=").Append(soundTimer);
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builder.Append(" plane=").Append(planeMask);
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builder.Append(" hires=").Append(hires ? "1" : "0");
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builder.Append('\n');
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for (int register = 0; register < v.Length; register++)
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{
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builder.Append('V').Append(register.ToString("X1", CultureInfo.InvariantCulture));
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builder.Append('=').Append(v[register].ToString("X2", CultureInfo.InvariantCulture));
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builder.Append((register & 0x7) == 0x7 ? '\n' : ' ');
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}
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builder.Append("stack=[");
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for (int frame = 0; frame < stack.Length; frame++)
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{
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if (frame > 0)
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{
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builder.Append(' ');
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}
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builder.Append("0x").Append(stack[frame].ToString("X4", CultureInfo.InvariantCulture));
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}
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builder.Append("]\n");
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return builder.ToString();
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}
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}
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