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Diffstat (limited to 'Chip/Q1CpuInstructions.cs')
-rw-r--r--Chip/Q1CpuInstructions.cs133
1 files changed, 87 insertions, 46 deletions
diff --git a/Chip/Q1CpuInstructions.cs b/Chip/Q1CpuInstructions.cs
index 8b79a1d..b31a102 100644
--- a/Chip/Q1CpuInstructions.cs
+++ b/Chip/Q1CpuInstructions.cs
@@ -5,56 +5,79 @@ 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"] },
+
+ { 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_CMP) },
- { 0x02, (this.Instruction_BR, this.Instruction_BZ, this.Instruction_BZ_LX, this.Instruction_LT) },
- { 0x03, (this.Instruction_NOP, this.Instruction_NOP, this.Instruction_NOP, this.Instruction_GT) },
+ { 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) },
- { 0x04, (this.Instruction_NOT_LX, this.Instruction_NOT, this.Instruction_NOP, this.Instruction_AND) },
- { 0x05, (this.Instruction_INV_DX, this.Instruction_INV, this.Instruction_NOP, this.Instruction_OR) },
- { 0x06, (this.Instruction_SHL_DX, this.Instruction_SHL, this.Instruction_NOP, this.Instruction_XOR) },
- { 0x07, (this.Instruction_SHR_DX, this.Instruction_SHR, 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) },
- { 0x08, (this.Instruction_INC_AX, this.Instruction_INC, this.Instruction_NOP, this.Instruction_ADD) },
- { 0x09, (this.Instruction_DEC_AX, this.Instruction_DEC, this.Instruction_NOP, this.Instruction_SUB) },
- { 0x0A, (this.Instruction_NOP, this.Instruction_NOP, this.Instruction_NOP, this.Instruction_DIV) },
- { 0x0B, (this.Instruction_NOP, this.Instruction_NOP, this.Instruction_NOP, this.Instruction_MUL) },
- { 0x0C, (this.Instruction_NOP, this.Instruction_NOP, this.Instruction_NOP, this.Instruction_MOD) },
+ { 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.FetchData(m1);
- u16 v2 = this.FetchData(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.FetchData(m1);
- u16 v2 = this.FetchData(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.FetchData(m1);
- u16 v2 = this.FetchData(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.FetchData(m1);
- u16 v2 = this.FetchData(m2);
+ u16 v1 = this.Address(m1).read();
+ u16 v2 = this.Address(m2).read();
if (v2 == 0)
throw new DivideByZeroException("Cannot perform division by zero.");
@@ -63,8 +86,8 @@ public partial class Q1Cpu
}
private void Instruction_MOD(u8 m1, u8 m2)
{
- u16 v1 = this.FetchData(m1);
- u16 v2 = this.FetchData(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.");
@@ -73,11 +96,15 @@ public partial class Q1Cpu
}
private void Instruction_INC(u8 obj)
{
- this.TransformData(obj, value => (u16)(value + 1));
+ var address = this.Address(obj);
+ u16 value = address.read();
+ address.write((u16)(value + 1));
}
private void Instruction_DEC(u8 obj)
{
- this.TransformData(obj, value => (u16)(value - 1));
+ var address = this.Address(obj);
+ u16 value = address.read();
+ address.write((u16)(value - 1));
}
private void Instruction_INC_AX()
{
@@ -89,11 +116,17 @@ public partial class Q1Cpu
}
private void Instruction_SHL(u8 obj)
{
- this.TransformData(obj, value => (u16)(value << 1));
+ var address = this.Address(obj);
+ u16 value = address.read();
+ u16 result = (u16)(value << 1);
+ address.write(result);
}
private void Instruction_SHR(u8 obj)
{
- this.TransformData(obj, value => (u16)(value >> 1));
+ var address = this.Address(obj);
+ u16 value = address.read();
+ u16 result = (u16)(value >> 1);
+ address.write(result);
}
private void Instruction_SHL_DX()
{
@@ -105,25 +138,26 @@ public partial class Q1Cpu
}
private void Instruction_XOR(u8 m1, u8 m2)
{
- u16 v1 = this.FetchData(m1);
- u16 v2 = this.FetchData(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.FetchData(m1);
- u16 v2 = this.FetchData(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)
{
- u16 value = this.FetchData(obj);
+ var address = this.Address(obj);
+ u16 value = address.read();
u16 result = (u16)~value;
- this.DX = result;
+ address.write(result);
}
private void Instruction_INV_DX()
{
@@ -131,15 +165,15 @@ public partial class Q1Cpu
}
private void Instruction_AND(u8 m1, u8 m2)
{
- u16 v1 = this.FetchData(m1);
- u16 v2 = this.FetchData(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.FetchData(obj);
+ u16 value = this.Address(obj).read();
u16 result = value == 0 ? (u16)1 : (u16)0;
this.LX = result;
}
@@ -149,15 +183,15 @@ public partial class Q1Cpu
}
private void Instruction_GT(u8 m1, u8 m2)
{
- u16 v1 = this.FetchData(m1);
- u16 v2 = this.FetchData(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.FetchData(m1);
- u16 v2 = this.FetchData(m2);
+ u16 v1 = this.Address(m1).read();
+ u16 v2 = this.Address(m2).read();
this.LX = (u16)(v1 < v2 ? 1 : 0);
}
@@ -174,22 +208,29 @@ public partial class Q1Cpu
}
private void Instruction_BZ(u8 obj)
{
- u16 value = this.FetchData(obj);
+ u16 value = this.Address(obj).read();
if (value == 0)
this.Instruction_BR();
}
private void Instruction_CMP(u8 m1, u8 m2)
{
- u16 v1 = this.FetchData(m1);
- u16 v2 = this.FetchData(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.FetchData(m1);
- this.StoreData(m2, value);
+ 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() { }
@@ -198,7 +239,7 @@ public partial class Q1Cpu
public void Instruction_JMP(u8 m1)
{
- this.PC = this.FetchData(m1);
+ this.PC = this.Address(m1).read();
}
public void Instruction_RET()
@@ -208,7 +249,7 @@ public partial class Q1Cpu
public void Instruction_CALL(u8 m1)
{
- u16 address = this.FetchData(m1);
+ u16 address = this.Address(m1).read();
this.PushStack(this.PC);
this.PC = address;
}
generated by cgit v1.3.1 (git 2.54.0) at 2026-10-31 15:41:51 +0000