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-rw-r--r--Emulator/Chip/Q1CpuInstructions.cs282
1 files changed, 282 insertions, 0 deletions
diff --git a/Emulator/Chip/Q1CpuInstructions.cs b/Emulator/Chip/Q1CpuInstructions.cs
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+++ b/Emulator/Chip/Q1CpuInstructions.cs
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+namespace Q1.Emulator.Chip;
+
+using System;
+using System.Collections.Generic;
+
+public partial class Q1Cpu
+{
+ public static Dictionary<u8, string[]> InstructionLookupStrings = new()
+ {
+ { 0x00, ["NOP", "JMP", "HALT", "MOV"] },
+ { 0x01, ["RET", "CALL", "SUS", "MOVB"] },
+ { 0x02, ["BZ", "BZ", "BR", "NOP"] },
+ { 0x03, ["NOP", "PUSH", "NOP", "NOP"] },
+ { 0x04, ["NOP", "POP", "NOP", "NOP"] },
+
+ { 0x10, ["INV", "INV", "NOP", "AND"] },
+ { 0x11, ["SHL", "SHL", "NOP", "OR"] },
+ { 0x12, ["SHR", "SHR", "NOP", "XOR"] },
+
+ { 0x20, ["NOT", "NOT", "NOP", "CMP"] },
+ { 0x21, ["NOP", "NOP", "NOP", "LT"] },
+ { 0x22, ["NOP", "NOP", "NOP", "GT"] },
+
+ { 0x30, ["INC_AX", "INC", "NOP", "ADD"] },
+ { 0x31, ["DEC_AX", "DEC", "NOP", "SUB"] },
+ { 0x32, ["NOP", "NOP", "NOP", "DIV"] },
+ { 0x33, ["NOP", "NOP", "NOP", "MUL"] },
+ { 0x34, ["NOP", "NOP", "NOP", "MOD"] },
+ };
+
+ public Dictionary<u8, (Action, Action<u8>, Action, Action<u8, u8>)> InstructionLookup;
+ private void LoadInstructionLookup()
+ {
+ this.InstructionLookup = new Dictionary<u8, (Action, Action<u8>, Action, Action<u8, u8>)>
+ {
+ { 0x00, (this.Instruction_NOP, this.Instruction_JMP, this.Instruction_HALT, this.Instruction_MOV) },
+ { 0x01, (this.Instruction_RET, this.Instruction_CALL, this.Instruction_SUS, this.Instruction_MOVB) },
+ { 0x02, (this.Instruction_BZ_LX, this.Instruction_BZ, this.Instruction_BR, this.Instruction_NOP) },
+ { 0x03, (this.Instruction_NOP, this.Instruction_PUSH, this.Instruction_NOP, this.Instruction_NOP) },
+ { 0x04, (this.Instruction_NOP, this.Instruction_POP, this.Instruction_NOP, this.Instruction_NOP) },
+
+ { 0x10, (this.Instruction_INV_DX, this.Instruction_INV, this.Instruction_NOP, this.Instruction_AND) },
+ { 0x11, (this.Instruction_SHL_DX, this.Instruction_SHL, this.Instruction_NOP, this.Instruction_OR) },
+ { 0x12, (this.Instruction_SHR_DX, this.Instruction_SHR, this.Instruction_NOP, this.Instruction_XOR) },
+
+ { 0x20, (this.Instruction_NOT_LX, this.Instruction_NOT, this.Instruction_NOP, this.Instruction_CMP) },
+ { 0x21, (this.Instruction_NOP, this.Instruction_NOP, this.Instruction_NOP, this.Instruction_LT) },
+ { 0x22, (this.Instruction_NOP, this.Instruction_NOP, this.Instruction_NOP, this.Instruction_GT) },
+
+ { 0x30, (this.Instruction_INC_AX, this.Instruction_INC, this.Instruction_NOP, this.Instruction_ADD) },
+ { 0x31, (this.Instruction_DEC_AX, this.Instruction_DEC, this.Instruction_NOP, this.Instruction_SUB) },
+ { 0x32, (this.Instruction_NOP, this.Instruction_NOP, this.Instruction_NOP, this.Instruction_DIV) },
+ { 0x33, (this.Instruction_NOP, this.Instruction_NOP, this.Instruction_NOP, this.Instruction_MUL) },
+ { 0x34, (this.Instruction_NOP, this.Instruction_NOP, this.Instruction_NOP, this.Instruction_MOD) },
+ };
+ }
+ private void Instruction_ADD(u8 m1, u8 m2)
+ {
+ u16 v1 = this.Address(m1).read();
+ u16 v2 = this.Address(m2).read();
+
+ u16 result = (u16) (v1 + v2);
+ this.AX = result;
+ }
+ private void Instruction_SUB(u8 m1, u8 m2)
+ {
+ u16 v1 = this.Address(m1).read();
+ u16 v2 = this.Address(m2).read();
+
+ u16 result = (u16) (v1 - v2);
+ this.AX = result;
+ }
+ private void Instruction_MUL(u8 m1, u8 m2)
+ {
+ u16 v1 = this.Address(m1).read();
+ u16 v2 = this.Address(m2).read();
+
+ u16 result = (u16) (v1 * v2);
+ this.AX = result;
+ }
+ private void Instruction_DIV(u8 m1, u8 m2)
+ {
+ u16 v1 = this.Address(m1).read();
+ u16 v2 = this.Address(m2).read();
+
+ if (v2 == 0)
+ throw new DivideByZeroException("Cannot perform division by zero.");
+ u16 result = (u16) (v1 / v2);
+ this.AX = result;
+ }
+ private void Instruction_MOD(u8 m1, u8 m2)
+ {
+ u16 v1 = this.Address(m1).read();
+ u16 v2 = this.Address(m2).read();
+
+ if (v2 == 0)
+ throw new DivideByZeroException("Cannot perform modulo operation with divisor zero.");
+ u16 result = (u16) (v1 % v2);
+ this.AX = result;
+ }
+ private void Instruction_INC(u8 obj)
+ {
+ var address = this.Address(obj);
+ u16 value = address.read();
+ address.write((u16) (value + 1));
+ }
+ private void Instruction_DEC(u8 obj)
+ {
+ var address = this.Address(obj);
+ u16 value = address.read();
+ address.write((u16) (value - 1));
+ }
+ private void Instruction_INC_AX()
+ {
+ this.AX = (u16) (this.AX + 1);
+ }
+ private void Instruction_DEC_AX()
+ {
+ this.AX = (u16) (this.AX - 1);
+ }
+ private void Instruction_SHL(u8 obj)
+ {
+ var address = this.Address(obj);
+ u16 value = address.read();
+ u16 result = (u16) (value << 1);
+ address.write(result);
+ }
+ private void Instruction_SHR(u8 obj)
+ {
+ var address = this.Address(obj);
+ u16 value = address.read();
+ u16 result = (u16) (value >> 1);
+ address.write(result);
+ }
+ private void Instruction_SHL_DX()
+ {
+ this.DX = (u16) (this.DX << 1);
+ }
+ private void Instruction_SHR_DX()
+ {
+ this.DX = (u16) (this.DX >> 1);
+ }
+ private void Instruction_XOR(u8 m1, u8 m2)
+ {
+ u16 v1 = this.Address(m1).read();
+ u16 v2 = this.Address(m2).read();
+
+ u16 result = (u16) (v1 ^ v2);
+ this.DX = result;
+ }
+ private void Instruction_OR(u8 m1, u8 m2)
+ {
+ u16 v1 = this.Address(m1).read();
+ u16 v2 = this.Address(m2).read();
+
+ u16 result = (u16) (v1 | v2);
+ this.DX = result;
+ }
+ private void Instruction_INV(u8 obj)
+ {
+ var address = this.Address(obj);
+ u16 value = address.read();
+ u16 result = (u16) ~value;
+ this.DX = result;
+ }
+ private void Instruction_INV_DX()
+ {
+ this.DX = (u16) ~this.DX;
+ }
+ private void Instruction_AND(u8 m1, u8 m2)
+ {
+ u16 v1 = this.Address(m1).read();
+ u16 v2 = this.Address(m2).read();
+
+ u16 result = (u16) (v1 & v2);
+ this.DX = result;
+ }
+ private void Instruction_NOT(u8 obj)
+ {
+ u16 value = this.Address(obj).read();
+ u16 result = value == 0 ? (u16) 1 : (u16) 0;
+ this.LX = result;
+ }
+ private void Instruction_NOT_LX()
+ {
+ this.LX = this.LX == 0 ? (u16) 1 : (u16) 0;
+ }
+ private void Instruction_GT(u8 m1, u8 m2)
+ {
+ u16 v1 = this.Address(m1).read();
+ u16 v2 = this.Address(m2).read();
+
+ this.LX = (u16) (v1 > v2 ? 1 : 0);
+ }
+ private void Instruction_LT(u8 m1, u8 m2)
+ {
+ u16 v1 = this.Address(m1).read();
+ u16 v2 = this.Address(m2).read();
+
+ this.LX = (u16) (v1 < v2 ? 1 : 0);
+ }
+
+ private void Instruction_BR()
+ {
+ this.FetchInstruction(out _, out _, out _, out u8 length);
+ this.PC += length;
+ }
+ private void Instruction_BZ_LX()
+ {
+ if (this.LX == 0)
+ this.Instruction_BR();
+ }
+ private void Instruction_BZ(u8 obj)
+ {
+ u16 value = this.Address(obj).read();
+ if (value == 0)
+ this.Instruction_BR();
+ }
+ private void Instruction_CMP(u8 m1, u8 m2)
+ {
+ u16 v1 = this.Address(m1).read();
+ u16 v2 = this.Address(m2).read();
+
+ // Set LX based on comparison
+ this.LX = (u16) (v1 == v2 ? 1 : 0);
+ }
+ private void Instruction_MOV(u8 m1, u8 m2)
+ {
+ u16 value = this.Address(m1).read();
+ this.Address(m2).write(value);
+ }
+
+ private void Instruction_MOVB(u8 m1, u8 m2)
+ {
+ u16 value = this.Address(m1).read();
+ u8 low = Make.ref8(value)[1];
+ this.Address(m2).writeByte(low);
+ }
+
+ public void Instruction_NOP() { }
+ public void Instruction_NOP(u8 m1) { }
+ public void Instruction_NOP(u8 m1, u8 m2) { }
+
+ public void Instruction_JMP(u8 m1)
+ {
+ this.PC = this.Address(m1).read();
+ }
+
+ public void Instruction_RET()
+ {
+ this.PC = this.PopStack();
+ }
+
+ public void Instruction_CALL(u8 m1)
+ {
+ u16 address = this.Address(m1).read();
+ this.PushStack(this.PC);
+ this.PC = address;
+ }
+
+ public void Instruction_HALT()
+ {
+ this.AbortRequested = true;
+ }
+
+ public void Instruction_SUS()
+ {
+ this.PC -= 2;
+ }
+
+ public void Instruction_PUSH(u8 m1)
+ {
+ u16 value = this.Address(m1).read();
+ this.PushStack(value);
+ }
+
+ public void Instruction_POP(u8 m1)
+ {
+ u16 value = this.PopStack();
+ this.Address(m1).write(value);
+ }
+} \ No newline at end of file
generated by cgit v1.3.1 (git 2.54.0) at 2026-10-31 18:07:09 +0000