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All keys implemented and a few more OpCodes

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This commit is contained in:
Marc Parsons
2026-04-18 21:04:29 +01:00
parent c35bbda53f
commit 7bc85a485b
3 changed files with 74 additions and 8 deletions
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24
Core/Cpu/Z80.cs
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@@ -1677,6 +1677,17 @@ namespace Core.Cpu
// 4. Write the immediate value directly into memory
_memory.Write(address36, n36);
return 19;
case 0x56: // LD D, (IX+d)
// 1. Fetch the displacement byte and cast it to a signed sbyte
sbyte offset56 = (sbyte)FetchByte();
// 2. Calculate the exact memory address (IX + offset)
ushort address56 = (ushort)(IX.Word + offset56);
// 3. Read the byte from memory and drop it into the D register (High byte of DE)
DE.High = _memory.Read(address56);
return 19;
case 0x5E: // LD E, (IX+d)
// 1. Fetch the displacement byte and cast it to a signed sbyte
@@ -1688,7 +1699,18 @@ namespace Core.Cpu
// 3. Read the byte from memory and drop it into the E register
DE.Low = _memory.Read(address5E);
return 19; // 19 T-States
return 19;
case 0x6E: // LD L, (IX+d)
// 1. Fetch the displacement byte and cast it to a signed sbyte
sbyte offset6E = (sbyte)FetchByte();
// 2. Calculate the exact memory address (IX + offset)
ushort address6E = (ushort)(IX.Word + offset6E);
// 3. Read the byte from memory and drop it into the L register (Low byte of HL)
HL.Low = _memory.Read(address6E);
return 19;
case 0x74: // LD (IX+d), H
// 1. Fetch the displacement byte and cast it to a signed sbyte
sbyte offset74 = (sbyte)FetchByte();

14
Desktop/DebuggerForm.cs
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@@ -850,6 +850,13 @@ namespace Desktop
mnemonic = $"LD (IX{sign}{d}), 0x{n:X2}";
instructionLength = 4;
}
else if (ddOpcode == 0x56) // LD D, (IX+d)
{
sbyte d = (sbyte)_memoryBus.Read((ushort)(currentPc + 2));
string sign = d >= 0 ? "+" : "";
mnemonic = $"LD D, (IX{sign}{d})";
instructionLength = 3;
}
else if (ddOpcode == 0x5E) // LD E, (IX+d)
{
sbyte d = (sbyte)_memoryBus.Read((ushort)(currentPc + 2));
@@ -857,6 +864,13 @@ namespace Desktop
mnemonic = $"LD E, (IX{sign}{d})";
instructionLength = 3;
}
else if (ddOpcode == 0x6E) // LD L, (IX+d)
{
sbyte d = (sbyte)_memoryBus.Read((ushort)(currentPc + 2));
string sign = d >= 0 ? "+" : "";
mnemonic = $"LD L, (IX{sign}{d})";
instructionLength = 3;
}
else if (ddOpcode == 0x74) // LD (IX+d), H
{
sbyte d = (sbyte)_memoryBus.Read((ushort)(currentPc + 2));

40
Desktop/Form1.cs
View File

@@ -198,6 +198,15 @@ namespace Desktop
{
switch (key)
{
//1:6 -
//Row 0: CAPS_SHIFT, Z, X, C, V
case Keys.ShiftKey: UpdateMatrix(0, 0, isPressed); break;
case Keys.Z: UpdateMatrix(0, 1, isPressed); break;
case Keys.X: UpdateMatrix(0, 2, isPressed); break;
case Keys.C: UpdateMatrix(0, 3, isPressed); break;
case Keys.V: UpdateMatrix(0, 4, isPressed); break;
// Row 1: A, S, D, F, G
case Keys.A: UpdateMatrix(1, 0, isPressed); break;
case Keys.S: UpdateMatrix(1, 1, isPressed); break;
@@ -205,8 +214,33 @@ namespace Desktop
case Keys.F: UpdateMatrix(1, 3, isPressed); break;
case Keys.G: UpdateMatrix(1, 4, isPressed); break;
//Row 2:
case Keys.Q: UpdateMatrix(2, 0, isPressed); break;
case Keys.W: UpdateMatrix(2, 1, isPressed); break;
case Keys.E: UpdateMatrix(2, 2, isPressed); break;
case Keys.R: UpdateMatrix(2, 3, isPressed); break;
case Keys.T: UpdateMatrix(2, 4, isPressed); break;
// Row 3:
case Keys.D1: UpdateMatrix(3, 0, isPressed); break;
case Keys.D2: UpdateMatrix(3, 1, isPressed); break;
case Keys.D3: UpdateMatrix(3, 2, isPressed); break;
case Keys.D4: UpdateMatrix(3, 3, isPressed); break;
case Keys.D5: UpdateMatrix(3, 4, isPressed); break;
// Row 4:
case Keys.D0: UpdateMatrix(4, 0, isPressed); break;
case Keys.D9: UpdateMatrix(4, 1, isPressed); break;
case Keys.D8: UpdateMatrix(4, 2, isPressed); break;
case Keys.D7: UpdateMatrix(4, 3, isPressed); break;
case Keys.D6: UpdateMatrix(4, 4, isPressed); break;
// Row 5:
case Keys.P: UpdateMatrix(5, 0, isPressed); break;
case Keys.O: UpdateMatrix(5, 1, isPressed); break;
case Keys.I: UpdateMatrix(5, 2, isPressed); break;
case Keys.U: UpdateMatrix(5, 3, isPressed); break;
case Keys.Y: UpdateMatrix(5, 4, isPressed); break;
// Row 6: ENTER, L, K, J, H
case Keys.Enter: UpdateMatrix(6, 0, isPressed); break;
@@ -217,14 +251,10 @@ namespace Desktop
// Row 7: SPACE, SYM SHIFT, M, N, B
case Keys.Space: UpdateMatrix(7, 0, isPressed); break;
case Keys.ControlKey: UpdateMatrix(7, 1, isPressed); break; // Symbol Shift
case Keys.M: UpdateMatrix(7, 2, isPressed); break;
case Keys.N: UpdateMatrix(7, 3, isPressed); break;
case Keys.B: UpdateMatrix(7, 4, isPressed); break;
case Keys.ControlKey: UpdateMatrix(7, 1, isPressed); break; // Symbol Shift
}
}
}