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Diffstat (limited to 'Emulator/Assembler/Disassembler.cs')
| -rw-r--r-- | Emulator/Assembler/Disassembler.cs | 74 |
1 files changed, 0 insertions, 74 deletions
diff --git a/Emulator/Assembler/Disassembler.cs b/Emulator/Assembler/Disassembler.cs deleted file mode 100644 index d49d2eb..0000000 --- a/Emulator/Assembler/Disassembler.cs +++ /dev/null @@ -1,74 +0,0 @@ -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 - } -}
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