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This commit is contained in:
Adrian Conlon 2024-05-21 21:49:10 +01:00
parent bd1f7c285b
commit f4ea6a0b13
3 changed files with 62 additions and 80 deletions
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17
M6502/Disassembler.cs
View File

@ -6,20 +6,13 @@ namespace EightBit
{
using System.Text;
public class Disassembler
public class Disassembler(Bus bus, M6502 processor, Symbols symbols)
{
private readonly Bus bus;
private readonly M6502 processor;
private readonly Symbols symbols;
private readonly Bus bus = bus;
private readonly M6502 processor = processor;
private readonly Symbols symbols = symbols;
private ushort address;
public Disassembler(Bus bus, M6502 processor, Symbols symbols)
{
this.bus = bus;
this.processor = processor;
this.symbols = symbols;
}
public static string DumpFlags(byte value)
{
var returned = new StringBuilder();
@ -47,7 +40,7 @@ namespace EightBit
var cell = this.bus.Peek(current);
output.Append(DumpByteValue(cell));
output.Append(" ");
output.Append(' ');
var next = this.bus.Peek((ushort)(current + 1));
var relative = (ushort)(this.processor.PC.Word + 2 + (sbyte)next);

53
M6502/M6502.cs
View File

@ -6,13 +6,13 @@ namespace EightBit
{
using System;
public class M6502 : LittleEndianProcessor
public class M6502(Bus bus) : LittleEndianProcessor(bus)
{
private const byte IRQvector = 0xfe; // IRQ vector
private const byte RSTvector = 0xfc; // RST vector
private const byte NMIvector = 0xfa; // NMI vector
private readonly Register16 intermediate = new Register16();
private readonly Register16 intermediate = new();
private byte crossedPage;
private bool handlingRESET = false;
@ -25,54 +25,49 @@ namespace EightBit
private PinLevel rdyLine = PinLevel.Low;
private PinLevel rwLine = PinLevel.Low;
public M6502(Bus bus)
: base(bus)
{
}
public event EventHandler<EventArgs>? ExecutingInstruction;
public event EventHandler<EventArgs> ExecutingInstruction;
public event EventHandler<EventArgs>? ExecutedInstruction;
public event EventHandler<EventArgs> ExecutedInstruction;
public event EventHandler<EventArgs>? RaisingNMI;
public event EventHandler<EventArgs> RaisingNMI;
public event EventHandler<EventArgs>? RaisedNMI;
public event EventHandler<EventArgs> RaisedNMI;
public event EventHandler<EventArgs>? LoweringNMI;
public event EventHandler<EventArgs> LoweringNMI;
public event EventHandler<EventArgs>? LoweredNMI;
public event EventHandler<EventArgs> LoweredNMI;
public event EventHandler<EventArgs>? RaisingSO;
public event EventHandler<EventArgs> RaisingSO;
public event EventHandler<EventArgs>? RaisedSO;
public event EventHandler<EventArgs> RaisedSO;
public event EventHandler<EventArgs>? LoweringSO;
public event EventHandler<EventArgs> LoweringSO;
public event EventHandler<EventArgs>? LoweredSO;
public event EventHandler<EventArgs> LoweredSO;
public event EventHandler<EventArgs>? RaisingSYNC;
public event EventHandler<EventArgs> RaisingSYNC;
public event EventHandler<EventArgs>? RaisedSYNC;
public event EventHandler<EventArgs> RaisedSYNC;
public event EventHandler<EventArgs>? LoweringSYNC;
public event EventHandler<EventArgs> LoweringSYNC;
public event EventHandler<EventArgs>? LoweredSYNC;
public event EventHandler<EventArgs> LoweredSYNC;
public event EventHandler<EventArgs>? RaisingRDY;
public event EventHandler<EventArgs> RaisingRDY;
public event EventHandler<EventArgs>? RaisedRDY;
public event EventHandler<EventArgs> RaisedRDY;
public event EventHandler<EventArgs>? LoweringRDY;
public event EventHandler<EventArgs> LoweringRDY;
public event EventHandler<EventArgs>? LoweredRDY;
public event EventHandler<EventArgs> LoweredRDY;
public event EventHandler<EventArgs>? RaisingRW;
public event EventHandler<EventArgs> RaisingRW;
public event EventHandler<EventArgs>? RaisedRW;
public event EventHandler<EventArgs> RaisedRW;
public event EventHandler<EventArgs>? LoweringRW;
public event EventHandler<EventArgs> LoweringRW;
public event EventHandler<EventArgs> LoweredRW;
public event EventHandler<EventArgs>? LoweredRW;
public ref PinLevel NMI => ref this.nmiLine;

72
M6502/Symbols.cs
View File

@ -10,7 +10,7 @@ namespace EightBit
public class Symbols
{
private readonly Dictionary<string, Dictionary<string, Dictionary<string, string>>> parsed;
private readonly Dictionary<string, Dictionary<string, Dictionary<string, string>>> parsed = [];
public Symbols()
: this(string.Empty)
@ -19,12 +19,6 @@ namespace EightBit
public Symbols(string path)
{
this.Labels = new Dictionary<ushort, string>();
this.Constants = new Dictionary<ushort, string>();
this.Scopes = new Dictionary<string, ushort>();
this.Addresses = new Dictionary<string, ushort>();
this.parsed = new Dictionary<string, Dictionary<string, Dictionary<string, string>>>();
if (path.Length > 0)
{
this.Parse(path);
@ -33,13 +27,13 @@ namespace EightBit
}
}
public Dictionary<ushort, string> Labels { get; }
public Dictionary<ushort, string> Labels { get; } = [];
public Dictionary<ushort, string> Constants { get; }
public Dictionary<ushort, string> Constants { get; } = [];
public Dictionary<string, ushort> Scopes { get; }
public Dictionary<string, ushort> Scopes { get; } = [];
public Dictionary<string, ushort> Addresses { get; }
public Dictionary<string, ushort> Addresses { get; } = [];
private void AssignScopes()
{
@ -48,7 +42,7 @@ namespace EightBit
{
var parsedScope = parsedScopeElement.Value;
var name = parsedScope["name"];
var trimmedName = name.Substring(1, name.Length - 2);
var trimmedName = name[1..^1];
var size = parsedScope["size"];
this.Scopes[trimmedName] = ushort.Parse(size);
}
@ -61,8 +55,8 @@ namespace EightBit
{
var symbol = symbolElement.Value;
var name = symbol["name"];
var trimmedName = name.Substring(1, name.Length - 2);
var value = symbol["val"].Substring(2);
var trimmedName = name[1..^1];
var value = symbol["val"][2..];
var number = Convert.ToUInt16(value, 16);
var symbolType = symbol["type"];
if (symbolType == "lab")
@ -79,37 +73,37 @@ namespace EightBit
private void Parse(string path)
{
using (var reader = new StreamReader(path))
using var reader = new StreamReader(path);
while (!reader.EndOfStream)
{
while (!reader.EndOfStream)
var line = reader.ReadLine();
if (line == null)
break;
var lineElements = line.Split(' ', '\t');
if (lineElements.Length == 2)
{
var line = reader.ReadLine();
var lineElements = line.Split(' ', '\t');
if (lineElements.Length == 2)
var type = lineElements[0];
var dataElements = lineElements[1].Split(',');
var data = new Dictionary<string, string>();
foreach (var dataElement in dataElements)
{
var type = lineElements[0];
var dataElements = lineElements[1].Split(',');
var data = new Dictionary<string, string>();
foreach (var dataElement in dataElements)
var definition = dataElement.Split('=');
if (definition.Length == 2)
{
var definition = dataElement.Split('=');
if (definition.Length == 2)
{
data[definition[0]] = definition[1];
}
data[definition[0]] = definition[1];
}
}
if (data.ContainsKey("id"))
{
if (!this.parsed.ContainsKey(type))
{
this.parsed[type] = new Dictionary<string, Dictionary<string, string>>();
}
if (data.ContainsKey("id"))
{
if (!this.parsed.ContainsKey(type))
{
this.parsed[type] = new Dictionary<string, Dictionary<string, string>>();
}
var id = data["id"];
data.Remove("id");
this.parsed[type][id] = data;
}
var id = data["id"];
data.Remove("id");
this.parsed[type][id] = data;
}
}
}