moved everything to seperate projects, and started compiler work + push and pop instructions added

1 files changed, 74 insertions, 0 deletions

diff --git a/Emulator/Assembler/Disassembler.cs b/Emulator/Assembler/Disassembler.cs
new file mode 100644
index 0000000..d49d2eb
--- /dev/null
+++ b/Emulator/Assembler/Disassembler.cs
@@ -0,0 +1,74 @@
+namespace Q1.Emulator.Assembler;
+
+using System;
+using System.Collections.Generic;
+using System.IO;
+using Chip;
+
+public class Disassembler
+{
+    public readonly StringWriter Writer;
+    public readonly BinaryReader Reader;
+    
+    public Disassembler(StringWriter writer, BinaryReader reader)
+    {
+        this.Writer = writer;
+        this.Reader = reader;
+    }
+    
+    private static Dictionary<u8, string> ModeLookup = new()
+    {
+        { 0x00, "" },
+        { 0x01, "c" },
+        { 0x02, "[a]" },
+        { 0x03, "@[a]" },
+        { 0x04, "pc + c" },
+        { 0x05, "r" },
+        { 0x06, "[r]" },
+        { 0x07, "[r + c]" },
+    };
+
+    public static string ParseInstruction(u16 instruction)
+    {
+        u8 op = (u8) ((instruction >> 8) & 0xFF); // 256 opcodes
+        u8 m1 = (u8) ((instruction >> 4) & 0x0F); // 16 modes
+        u8 m2 = (u8) (instruction        & 0x0F); // 16 modes
+
+        u8 i = (m1, m2) switch
+        {
+            (0x00, 0x00) => 0, // Implicit
+            (0x00, 0x01)    => 2, // Extended implicit
+            (_, 0x00)    => 1, // Simple addressing mode
+            _            => 3  // Extended addressing mode
+        };
+
+        string opcodeName = Disassembler.GetOpcodeName(op, i);
+
+        if (i == 0 || i == 2)
+            return opcodeName;
+
+        if (i == 1)
+            return $"{opcodeName} {Disassembler.GetModeName(m1)}";
+
+        if (i == 3)
+            return $"{opcodeName} {Disassembler.GetModeName(m1)}, {Disassembler.GetModeName(m2)}";
+
+        throw new InvalidOperationException($"Unknown instruction format for opcode {op:X2} with modes {m1:X2}, {m2:X2}");
+    }
+
+    private static string GetOpcodeName(u8 opcode, u8 i)
+    {
+        if (!Q1Cpu.InstructionLookupStrings.TryGetValue(opcode, out string[]? opNames))
+            return $"[{opcode:X2}]"; // Fallback for unknown opcodes
+
+        return opNames[i];
+    }
+
+    private static string GetModeName(u8 mode)
+    {
+        if (Disassembler.ModeLookup.TryGetValue(mode, out string? modeName))
+            return modeName;
+
+        return $"[{mode:X2}]"; // Fallback for unknown modes
+    }
+}
\ No newline at end of file