kiltum/emuz80disasmgo
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497d0715daf442f65850bdbf481caca7d838bf15
emuz80disasmgo/decode_dd.go

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package disasm
import (
"fmt"
)
// decodeDD decodes DD-prefixed instructions (IX register)
func (d *Disassembler) decodeDD(data []byte) (*Instruction, error) {
opcode := data[1]
// Handle DD prefixed instructions
switch opcode {
case 0x09:
return &Instruction{Mnemonic: "ADD IX, BC", Length: 2, Address: 0xFFFF}, nil
case 0x19:
return &Instruction{Mnemonic: "ADD IX, DE", Length: 2, Address: 0xFFFF}, nil
case 0x21:
nn := uint16(data[3])<<8 | uint16(data[2])
return &Instruction{Mnemonic: fmt.Sprintf("LD IX, $%04X", nn), Length: 4, Address: nn}, nil
case 0x22:
nn := uint16(data[3])<<8 | uint16(data[2])
return &Instruction{Mnemonic: fmt.Sprintf("LD ($%04X), IX", nn), Length: 4, Address: nn}, nil
case 0x23:
return &Instruction{Mnemonic: "INC IX", Length: 2, Address: 0xFFFF}, nil
case 0x24:
return &Instruction{Mnemonic: "INC IXH", Length: 2, Address: 0xFFFF}, nil
case 0x25:
return &Instruction{Mnemonic: "DEC IXH", Length: 2, Address: 0xFFFF}, nil
case 0x26:
n := data[2]
return &Instruction{Mnemonic: fmt.Sprintf("LD IXH, $%02X", n), Length: 3, Address: 0xFFFF}, nil
case 0x29:
return &Instruction{Mnemonic: "ADD IX, IX", Length: 2, Address: 0xFFFF}, nil
case 0x2A:
nn := uint16(data[3])<<8 | uint16(data[2])
return &Instruction{Mnemonic: fmt.Sprintf("LD IX, ($%04X)", nn), Length: 4, Address: nn}, nil
case 0x2B:
return &Instruction{Mnemonic: "DEC IX", Length: 2, Address: 0xFFFF}, nil
case 0x2C:
return &Instruction{Mnemonic: "INC IXL", Length: 2, Address: 0xFFFF}, nil
case 0x2D:
return &Instruction{Mnemonic: "DEC IXL", Length: 2, Address: 0xFFFF}, nil
case 0x2E:
n := data[2]
return &Instruction{Mnemonic: fmt.Sprintf("LD IXL, $%02X", n), Length: 3, Address: 0xFFFF}, nil
case 0x34:
disp := int8(data[2])
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("INC (IX+$%02X)", disp), Length: 3, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("INC (IX-$%02X)", -disp), Length: 3, Address: 0xFFFF}, nil
}
case 0x35:
disp := int8(data[2])
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("DEC (IX+$%02X)", disp), Length: 3, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("DEC (IX-$%02X)", -disp), Length: 3, Address: 0xFFFF}, nil
}
case 0x36:
disp := int8(data[2])
n := data[3]
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("LD (IX+$%02X), $%02X", disp, n), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("LD (IX-$%02X), $%02X", -disp, n), Length: 4, Address: 0xFFFF}, nil
}
case 0x39:
return &Instruction{Mnemonic: "ADD IX, SP", Length: 2, Address: 0xFFFF}, nil
case 0x44:
return &Instruction{Mnemonic: "LD B, IXH", Length: 2, Address: 0xFFFF}, nil
case 0x45:
return &Instruction{Mnemonic: "LD B, IXL", Length: 2, Address: 0xFFFF}, nil
case 0x46:
disp := int8(data[2])
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("LD B, (IX+$%02X)", disp), Length: 3, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("LD B, (IX-$%02X)", -disp), Length: 3, Address: 0xFFFF}, nil
}
case 0x4C:
return &Instruction{Mnemonic: "LD C, IXH", Length: 2, Address: 0xFFFF}, nil
case 0x4D:
return &Instruction{Mnemonic: "LD C, IXL", Length: 2, Address: 0xFFFF}, nil
case 0x4E:
disp := int8(data[2])
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("LD C, (IX+$%02X)", disp), Length: 3, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("LD C, (IX-$%02X)", -disp), Length: 3, Address: 0xFFFF}, nil
}
case 0x54:
return &Instruction{Mnemonic: "LD D, IXH", Length: 2, Address: 0xFFFF}, nil
case 0x55:
return &Instruction{Mnemonic: "LD D, IXL", Length: 2, Address: 0xFFFF}, nil
case 0x56:
disp := int8(data[2])
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("LD D, (IX+$%02X)", disp), Length: 3, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("LD D, (IX-$%02X)", -disp), Length: 3, Address: 0xFFFF}, nil
}
case 0x5C:
return &Instruction{Mnemonic: "LD E, IXH", Length: 2, Address: 0xFFFF}, nil
case 0x5D:
return &Instruction{Mnemonic: "LD E, IXL", Length: 2, Address: 0xFFFF}, nil
case 0x5E:
disp := int8(data[2])
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("LD E, (IX+$%02X)", disp), Length: 3, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("LD E, (IX-$%02X)", -disp), Length: 3, Address: 0xFFFF}, nil
}
case 0x60:
return &Instruction{Mnemonic: "LD IXH, B", Length: 2, Address: 0xFFFF}, nil
case 0x61:
return &Instruction{Mnemonic: "LD IXH, C", Length: 2, Address: 0xFFFF}, nil
case 0x62:
return &Instruction{Mnemonic: "LD IXH, D", Length: 2, Address: 0xFFFF}, nil
case 0x63:
return &Instruction{Mnemonic: "LD IXH, E", Length: 2, Address: 0xFFFF}, nil
case 0x64:
return &Instruction{Mnemonic: "LD IXH, IXH", Length: 2, Address: 0xFFFF}, nil
case 0x65:
return &Instruction{Mnemonic: "LD IXH, IXL", Length: 2, Address: 0xFFFF}, nil
case 0x66:
disp := int8(data[2])
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("LD H, (IX+$%02X)", disp), Length: 3, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("LD H, (IX-$%02X)", -disp), Length: 3, Address: 0xFFFF}, nil
}
case 0x67:
return &Instruction{Mnemonic: "LD IXH, A", Length: 2, Address: 0xFFFF}, nil
case 0x68:
return &Instruction{Mnemonic: "LD IXL, B", Length: 2, Address: 0xFFFF}, nil
case 0x69:
return &Instruction{Mnemonic: "LD IXL, C", Length: 2, Address: 0xFFFF}, nil
case 0x6A:
return &Instruction{Mnemonic: "LD IXL, D", Length: 2, Address: 0xFFFF}, nil
case 0x6B:
return &Instruction{Mnemonic: "LD IXL, E", Length: 2, Address: 0xFFFF}, nil
case 0x6C:
return &Instruction{Mnemonic: "LD IXL, IXH", Length: 2, Address: 0xFFFF}, nil
case 0x6D:
return &Instruction{Mnemonic: "LD IXL, IXL", Length: 2, Address: 0xFFFF}, nil
case 0x6E:
disp := int8(data[2])
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("LD L, (IX+$%02X)", disp), Length: 3, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("LD L, (IX-$%02X)", -disp), Length: 3, Address: 0xFFFF}, nil
}
case 0x6F:
return &Instruction{Mnemonic: "LD IXL, A", Length: 2, Address: 0xFFFF}, nil
case 0x70:
disp := int8(data[2])
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("LD (IX+$%02X), B", disp), Length: 3, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("LD (IX-$%02X), B", -disp), Length: 3, Address: 0xFFFF}, nil
}
case 0x71:
disp := int8(data[2])
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("LD (IX+$%02X), C", disp), Length: 3, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("LD (IX-$%02X), C", -disp), Length: 3, Address: 0xFFFF}, nil
}
case 0x72:
disp := int8(data[2])
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("LD (IX+$%02X), D", disp), Length: 3, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("LD (IX-$%02X), D", -disp), Length: 3, Address: 0xFFFF}, nil
}
case 0x73:
disp := int8(data[2])
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("LD (IX+$%02X), E", disp), Length: 3, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("LD (IX-$%02X), E", -disp), Length: 3, Address: 0xFFFF}, nil
}
case 0x74:
disp := int8(data[2])
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("LD (IX+$%02X), H", disp), Length: 3, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("LD (IX-$%02X), H", -disp), Length: 3, Address: 0xFFFF}, nil
}
case 0x75:
disp := int8(data[2])
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("LD (IX+$%02X), L", disp), Length: 3, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("LD (IX-$%02X), L", -disp), Length: 3, Address: 0xFFFF}, nil
}
case 0x77:
disp := int8(data[2])
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("LD (IX+$%02X), A", disp), Length: 3, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("LD (IX-$%02X), A", -disp), Length: 3, Address: 0xFFFF}, nil
}
case 0x7C:
return &Instruction{Mnemonic: "LD A, IXH", Length: 2, Address: 0xFFFF}, nil
case 0x7D:
return &Instruction{Mnemonic: "LD A, IXL", Length: 2, Address: 0xFFFF}, nil
case 0x7E:
disp := int8(data[2])
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("LD A, (IX+$%02X)", disp), Length: 3, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("LD A, (IX-$%02X)", -disp), Length: 3, Address: 0xFFFF}, nil
}
case 0x84:
return &Instruction{Mnemonic: "ADD A, IXH", Length: 2, Address: 0xFFFF}, nil
case 0x85:
return &Instruction{Mnemonic: "ADD A, IXL", Length: 2, Address: 0xFFFF}, nil
case 0x86:
disp := int8(data[2])
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("ADD A, (IX+$%02X)", disp), Length: 3, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("ADD A, (IX-$%02X)", -disp), Length: 3, Address: 0xFFFF}, nil
}
case 0x8C:
return &Instruction{Mnemonic: "ADC A, IXH", Length: 2, Address: 0xFFFF}, nil
case 0x8D:
return &Instruction{Mnemonic: "ADC A, IXL", Length: 2, Address: 0xFFFF}, nil
case 0x8E:
disp := int8(data[2])
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("ADC A, (IX+$%02X)", disp), Length: 3, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("ADC A, (IX-$%02X)", -disp), Length: 3, Address: 0xFFFF}, nil
}
case 0x94:
return &Instruction{Mnemonic: "SUB IXH", Length: 2, Address: 0xFFFF}, nil
case 0x95:
return &Instruction{Mnemonic: "SUB IXL", Length: 2, Address: 0xFFFF}, nil
case 0x96:
disp := int8(data[2])
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("SUB (IX+$%02X)", disp), Length: 3, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("SUB (IX-$%02X)", -disp), Length: 3, Address: 0xFFFF}, nil
}
case 0x9C:
return &Instruction{Mnemonic: "SBC A, IXH", Length: 2, Address: 0xFFFF}, nil
case 0x9D:
return &Instruction{Mnemonic: "SBC A, IXL", Length: 2, Address: 0xFFFF}, nil
case 0x9E:
disp := int8(data[2])
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("SBC A, (IX+$%02X)", disp), Length: 3, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("SBC A, (IX-$%02X)", -disp), Length: 3, Address: 0xFFFF}, nil
}
case 0xA4:
return &Instruction{Mnemonic: "AND IXH", Length: 2, Address: 0xFFFF}, nil
case 0xA5:
return &Instruction{Mnemonic: "AND IXL", Length: 2, Address: 0xFFFF}, nil
case 0xA6:
disp := int8(data[2])
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("AND (IX+$%02X)", disp), Length: 3, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("AND (IX-$%02X)", -disp), Length: 3, Address: 0xFFFF}, nil
}
case 0xAC:
return &Instruction{Mnemonic: "XOR IXH", Length: 2, Address: 0xFFFF}, nil
case 0xAD:
return &Instruction{Mnemonic: "XOR IXL", Length: 2, Address: 0xFFFF}, nil
case 0xAE:
disp := int8(data[2])
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("XOR (IX+$%02X)", disp), Length: 3, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("XOR (IX-$%02X)", -disp), Length: 3, Address: 0xFFFF}, nil
}
case 0xB4:
return &Instruction{Mnemonic: "OR IXH", Length: 2, Address: 0xFFFF}, nil
case 0xB5:
return &Instruction{Mnemonic: "OR IXL", Length: 2, Address: 0xFFFF}, nil
case 0xB6:
disp := int8(data[2])
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("OR (IX+$%02X)", disp), Length: 3, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("OR (IX-$%02X)", -disp), Length: 3, Address: 0xFFFF}, nil
}
case 0xBC:
return &Instruction{Mnemonic: "CP IXH", Length: 2, Address: 0xFFFF}, nil
case 0xBD:
return &Instruction{Mnemonic: "CP IXL", Length: 2, Address: 0xFFFF}, nil
case 0xBE:
disp := int8(data[2])
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("CP (IX+$%02X)", disp), Length: 3, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("CP (IX-$%02X)", -disp), Length: 3, Address: 0xFFFF}, nil
}
case 0xCB:
disp := int8(data[2])
cbOpcode := data[3]
// Handle DDCB prefixed instructions
switch cbOpcode {
// RLC (IX+d) - All opcodes including undocumented ones
case 0x00:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("RLC (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("RLC (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0x01:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("RLC (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("RLC (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0x02:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("RLC (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("RLC (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0x03:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("RLC (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("RLC (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0x04:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("RLC (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("RLC (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0x05:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("RLC (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("RLC (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0x06:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("RLC (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("RLC (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0x07:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("RLC (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("RLC (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
// RRC (IX+d) - All opcodes including undocumented ones
case 0x08:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("RRC (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("RRC (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0x09:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("RRC (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("RRC (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0x0A:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("RRC (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("RRC (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0x0B:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("RRC (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("RRC (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0x0C:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("RRC (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("RRC (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0x0D:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("RRC (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("RRC (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0x0E:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("RRC (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("RRC (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0x0F:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("RRC (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("RRC (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
// RL (IX+d) - All opcodes including undocumented ones
case 0x10:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("RL (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("RL (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0x11:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("RL (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("RL (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0x12:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("RL (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("RL (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0x13:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("RL (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("RL (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0x14:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("RL (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("RL (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0x15:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("RL (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("RL (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0x16:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("RL (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("RL (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0x17:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("RL (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("RL (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
// RR (IX+d) - All opcodes including undocumented ones
case 0x18:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("RR (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("RR (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0x19:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("RR (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("RR (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0x1A:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("RR (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("RR (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0x1B:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("RR (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("RR (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0x1C:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("RR (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("RR (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0x1D:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("RR (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("RR (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0x1E:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("RR (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("RR (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0x1F:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("RR (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("RR (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
// SLA (IX+d) - All opcodes including undocumented ones
case 0x20:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("SLA (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("SLA (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0x21:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("SLA (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("SLA (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0x22:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("SLA (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("SLA (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0x23:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("SLA (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("SLA (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0x24:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("SLA (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("SLA (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0x25:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("SLA (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("SLA (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0x26:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("SLA (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("SLA (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0x27:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("SLA (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("SLA (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
// SRA (IX+d) - All opcodes including undocumented ones
case 0x28:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("SRA (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("SRA (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0x29:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("SRA (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("SRA (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0x2A:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("SRA (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("SRA (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0x2B:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("SRA (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("SRA (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0x2C:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("SRA (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("SRA (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0x2D:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("SRA (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("SRA (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0x2E:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("SRA (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("SRA (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0x2F:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("SRA (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("SRA (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
// SLL (IX+d) - All opcodes including undocumented ones
case 0x30:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("SLL (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("SLL (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0x31:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("SLL (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("SLL (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0x32:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("SLL (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("SLL (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0x33:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("SLL (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("SLL (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0x34:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("SLL (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("SLL (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0x35:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("SLL (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("SLL (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0x36:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("SLL (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("SLL (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0x37:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("SLL (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("SLL (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
// SRL (IX+d) - All opcodes including undocumented ones
case 0x38:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("SRL (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("SRL (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0x39:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("SRL (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("SRL (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0x3A:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("SRL (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("SRL (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0x3B:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("SRL (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("SRL (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0x3C:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("SRL (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("SRL (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0x3D:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("SRL (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("SRL (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0x3E:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("SRL (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("SRL (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0x3F:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("SRL (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("SRL (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
// BIT b, r - Operate on registers (undocumented when prefixed with DD)
// BIT 0, r
case 0x40:
return &Instruction{Mnemonic: "BIT 0, B", Length: 4, Address: 0xFFFF}, nil
case 0x41:
return &Instruction{Mnemonic: "BIT 0, C", Length: 4, Address: 0xFFFF}, nil
case 0x42:
return &Instruction{Mnemonic: "BIT 0, D", Length: 4, Address: 0xFFFF}, nil
case 0x43:
return &Instruction{Mnemonic: "BIT 0, E", Length: 4, Address: 0xFFFF}, nil
case 0x44:
return &Instruction{Mnemonic: "BIT 0, H", Length: 4, Address: 0xFFFF}, nil
case 0x45:
return &Instruction{Mnemonic: "BIT 0, L", Length: 4, Address: 0xFFFF}, nil
case 0x46:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("BIT 0, (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("BIT 0, (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0x47:
return &Instruction{Mnemonic: "BIT 0, A", Length: 4, Address: 0xFFFF}, nil
// BIT 1, r
case 0x48:
return &Instruction{Mnemonic: "BIT 1, B", Length: 4, Address: 0xFFFF}, nil
case 0x49:
return &Instruction{Mnemonic: "BIT 1, C", Length: 4, Address: 0xFFFF}, nil
case 0x4A:
return &Instruction{Mnemonic: "BIT 1, D", Length: 4, Address: 0xFFFF}, nil
case 0x4B:
return &Instruction{Mnemonic: "BIT 1, E", Length: 4, Address: 0xFFFF}, nil
case 0x4C:
return &Instruction{Mnemonic: "BIT 1, H", Length: 4, Address: 0xFFFF}, nil
case 0x4D:
return &Instruction{Mnemonic: "BIT 1, L", Length: 4, Address: 0xFFFF}, nil
case 0x4E:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("BIT 1, (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("BIT 1, (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0x4F:
return &Instruction{Mnemonic: "BIT 1, A", Length: 4, Address: 0xFFFF}, nil
// BIT 2, r
case 0x50:
return &Instruction{Mnemonic: "BIT 2, B", Length: 4, Address: 0xFFFF}, nil
case 0x51:
return &Instruction{Mnemonic: "BIT 2, C", Length: 4, Address: 0xFFFF}, nil
case 0x52:
return &Instruction{Mnemonic: "BIT 2, D", Length: 4, Address: 0xFFFF}, nil
case 0x53:
return &Instruction{Mnemonic: "BIT 2, E", Length: 4, Address: 0xFFFF}, nil
case 0x54:
return &Instruction{Mnemonic: "BIT 2, H", Length: 4, Address: 0xFFFF}, nil
case 0x55:
return &Instruction{Mnemonic: "BIT 2, L", Length: 4, Address: 0xFFFF}, nil
case 0x56:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("BIT 2, (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("BIT 2, (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0x57:
return &Instruction{Mnemonic: "BIT 2, A", Length: 4, Address: 0xFFFF}, nil
// BIT 3, r
case 0x58:
return &Instruction{Mnemonic: "BIT 3, B", Length: 4, Address: 0xFFFF}, nil
case 0x59:
return &Instruction{Mnemonic: "BIT 3, C", Length: 4, Address: 0xFFFF}, nil
case 0x5A:
return &Instruction{Mnemonic: "BIT 3, D", Length: 4, Address: 0xFFFF}, nil
case 0x5B:
return &Instruction{Mnemonic: "BIT 3, E", Length: 4, Address: 0xFFFF}, nil
case 0x5C:
return &Instruction{Mnemonic: "BIT 3, H", Length: 4, Address: 0xFFFF}, nil
case 0x5D:
return &Instruction{Mnemonic: "BIT 3, L", Length: 4, Address: 0xFFFF}, nil
case 0x5E:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("BIT 3, (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("BIT 3, (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0x5F:
return &Instruction{Mnemonic: "BIT 3, A", Length: 4, Address: 0xFFFF}, nil
// BIT 4, r
case 0x60:
return &Instruction{Mnemonic: "BIT 4, B", Length: 4, Address: 0xFFFF}, nil
case 0x61:
return &Instruction{Mnemonic: "BIT 4, C", Length: 4, Address: 0xFFFF}, nil
case 0x62:
return &Instruction{Mnemonic: "BIT 4, D", Length: 4, Address: 0xFFFF}, nil
case 0x63:
return &Instruction{Mnemonic: "BIT 4, E", Length: 4, Address: 0xFFFF}, nil
case 0x64:
return &Instruction{Mnemonic: "BIT 4, H", Length: 4, Address: 0xFFFF}, nil
case 0x65:
return &Instruction{Mnemonic: "BIT 4, L", Length: 4, Address: 0xFFFF}, nil
case 0x66:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("BIT 4, (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("BIT 4, (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0x67:
return &Instruction{Mnemonic: "BIT 4, A", Length: 4, Address: 0xFFFF}, nil
// BIT 5, r
case 0x68:
return &Instruction{Mnemonic: "BIT 5, B", Length: 4, Address: 0xFFFF}, nil
case 0x69:
return &Instruction{Mnemonic: "BIT 5, C", Length: 4, Address: 0xFFFF}, nil
case 0x6A:
return &Instruction{Mnemonic: "BIT 5, D", Length: 4, Address: 0xFFFF}, nil
case 0x6B:
return &Instruction{Mnemonic: "BIT 5, E", Length: 4, Address: 0xFFFF}, nil
case 0x6C:
return &Instruction{Mnemonic: "BIT 5, H", Length: 4, Address: 0xFFFF}, nil
case 0x6D:
return &Instruction{Mnemonic: "BIT 5, L", Length: 4, Address: 0xFFFF}, nil
case 0x6E:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("BIT 5, (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("BIT 5, (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0x6F:
return &Instruction{Mnemonic: "BIT 5, A", Length: 4, Address: 0xFFFF}, nil
// BIT 6, r
case 0x70:
return &Instruction{Mnemonic: "BIT 6, B", Length: 4, Address: 0xFFFF}, nil
case 0x71:
return &Instruction{Mnemonic: "BIT 6, C", Length: 4, Address: 0xFFFF}, nil
case 0x72:
return &Instruction{Mnemonic: "BIT 6, D", Length: 4, Address: 0xFFFF}, nil
case 0x73:
return &Instruction{Mnemonic: "BIT 6, E", Length: 4, Address: 0xFFFF}, nil
case 0x74:
return &Instruction{Mnemonic: "BIT 6, H", Length: 4, Address: 0xFFFF}, nil
case 0x75:
return &Instruction{Mnemonic: "BIT 6, L", Length: 4, Address: 0xFFFF}, nil
case 0x76:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("BIT 6, (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("BIT 6, (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0x77:
return &Instruction{Mnemonic: "BIT 6, A", Length: 4, Address: 0xFFFF}, nil
// BIT 7, r
case 0x78:
return &Instruction{Mnemonic: "BIT 7, B", Length: 4, Address: 0xFFFF}, nil
case 0x79:
return &Instruction{Mnemonic: "BIT 7, C", Length: 4, Address: 0xFFFF}, nil
case 0x7A:
return &Instruction{Mnemonic: "BIT 7, D", Length: 4, Address: 0xFFFF}, nil
case 0x7B:
return &Instruction{Mnemonic: "BIT 7, E", Length: 4, Address: 0xFFFF}, nil
case 0x7C:
return &Instruction{Mnemonic: "BIT 7, H", Length: 4, Address: 0xFFFF}, nil
case 0x7D:
return &Instruction{Mnemonic: "BIT 7, L", Length: 4, Address: 0xFFFF}, nil
case 0x7E:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("BIT 7, (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("BIT 7, (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0x7F:
return &Instruction{Mnemonic: "BIT 7, A", Length: 4, Address: 0xFFFF}, nil
// RES b, r - Operate on registers (undocumented when prefixed with DD)
// RES 0, r
case 0x80:
return &Instruction{Mnemonic: "RES 0, B", Length: 4, Address: 0xFFFF}, nil
case 0x81:
return &Instruction{Mnemonic: "RES 0, C", Length: 4, Address: 0xFFFF}, nil
case 0x82:
return &Instruction{Mnemonic: "RES 0, D", Length: 4, Address: 0xFFFF}, nil
case 0x83:
return &Instruction{Mnemonic: "RES 0, E", Length: 4, Address: 0xFFFF}, nil
case 0x84:
return &Instruction{Mnemonic: "RES 0, H", Length: 4, Address: 0xFFFF}, nil
case 0x85:
return &Instruction{Mnemonic: "RES 0, L", Length: 4, Address: 0xFFFF}, nil
case 0x86:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("RES 0, (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("RES 0, (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0x87:
return &Instruction{Mnemonic: "RES 0, A", Length: 4, Address: 0xFFFF}, nil
// RES 1, r
case 0x88:
return &Instruction{Mnemonic: "RES 1, B", Length: 4, Address: 0xFFFF}, nil
case 0x89:
return &Instruction{Mnemonic: "RES 1, C", Length: 4, Address: 0xFFFF}, nil
case 0x8A:
return &Instruction{Mnemonic: "RES 1, D", Length: 4, Address: 0xFFFF}, nil
case 0x8B:
return &Instruction{Mnemonic: "RES 1, E", Length: 4, Address: 0xFFFF}, nil
case 0x8C:
return &Instruction{Mnemonic: "RES 1, H", Length: 4, Address: 0xFFFF}, nil
case 0x8D:
return &Instruction{Mnemonic: "RES 1, L", Length: 4, Address: 0xFFFF}, nil
case 0x8E:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("RES 1, (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("RES 1, (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0x8F:
return &Instruction{Mnemonic: "RES 1, A", Length: 4, Address: 0xFFFF}, nil
// RES 2, r
case 0x90:
return &Instruction{Mnemonic: "RES 2, B", Length: 4, Address: 0xFFFF}, nil
case 0x91:
return &Instruction{Mnemonic: "RES 2, C", Length: 4, Address: 0xFFFF}, nil
case 0x92:
return &Instruction{Mnemonic: "RES 2, D", Length: 4, Address: 0xFFFF}, nil
case 0x93:
return &Instruction{Mnemonic: "RES 2, E", Length: 4, Address: 0xFFFF}, nil
case 0x94:
return &Instruction{Mnemonic: "RES 2, H", Length: 4, Address: 0xFFFF}, nil
case 0x95:
return &Instruction{Mnemonic: "RES 2, L", Length: 4, Address: 0xFFFF}, nil
case 0x96:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("RES 2, (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("RES 2, (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0x97:
return &Instruction{Mnemonic: "RES 2, A", Length: 4, Address: 0xFFFF}, nil
// RES 3, r
case 0x98:
return &Instruction{Mnemonic: "RES 3, B", Length: 4, Address: 0xFFFF}, nil
case 0x99:
return &Instruction{Mnemonic: "RES 3, C", Length: 4, Address: 0xFFFF}, nil
case 0x9A:
return &Instruction{Mnemonic: "RES 3, D", Length: 4, Address: 0xFFFF}, nil
case 0x9B:
return &Instruction{Mnemonic: "RES 3, E", Length: 4, Address: 0xFFFF}, nil
case 0x9C:
return &Instruction{Mnemonic: "RES 3, H", Length: 4, Address: 0xFFFF}, nil
case 0x9D:
return &Instruction{Mnemonic: "RES 3, L", Length: 4, Address: 0xFFFF}, nil
case 0x9E:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("RES 3, (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("RES 3, (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0x9F:
return &Instruction{Mnemonic: "RES 3, A", Length: 4, Address: 0xFFFF}, nil
// RES 4, r
case 0xA0:
return &Instruction{Mnemonic: "RES 4, B", Length: 4, Address: 0xFFFF}, nil
case 0xA1:
return &Instruction{Mnemonic: "RES 4, C", Length: 4, Address: 0xFFFF}, nil
case 0xA2:
return &Instruction{Mnemonic: "RES 4, D", Length: 4, Address: 0xFFFF}, nil
case 0xA3:
return &Instruction{Mnemonic: "RES 4, E", Length: 4, Address: 0xFFFF}, nil
case 0xA4:
return &Instruction{Mnemonic: "RES 4, H", Length: 4, Address: 0xFFFF}, nil
case 0xA5:
return &Instruction{Mnemonic: "RES 4, L", Length: 4, Address: 0xFFFF}, nil
case 0xA6:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("RES 4, (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("RES 4, (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0xA7:
return &Instruction{Mnemonic: "RES 4, A", Length: 4, Address: 0xFFFF}, nil
// RES 5, r
case 0xA8:
return &Instruction{Mnemonic: "RES 5, B", Length: 4, Address: 0xFFFF}, nil
case 0xA9:
return &Instruction{Mnemonic: "RES 5, C", Length: 4, Address: 0xFFFF}, nil
case 0xAA:
return &Instruction{Mnemonic: "RES 5, D", Length: 4, Address: 0xFFFF}, nil
case 0xAB:
return &Instruction{Mnemonic: "RES 5, E", Length: 4, Address: 0xFFFF}, nil
case 0xAC:
return &Instruction{Mnemonic: "RES 5, H", Length: 4, Address: 0xFFFF}, nil
case 0xAD:
return &Instruction{Mnemonic: "RES 5, L", Length: 4, Address: 0xFFFF}, nil
case 0xAE:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("RES 5, (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("RES 5, (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0xAF:
return &Instruction{Mnemonic: "RES 5, A", Length: 4, Address: 0xFFFF}, nil
// RES 6, r
case 0xB0:
return &Instruction{Mnemonic: "RES 6, B", Length: 4, Address: 0xFFFF}, nil
case 0xB1:
return &Instruction{Mnemonic: "RES 6, C", Length: 4, Address: 0xFFFF}, nil
case 0xB2:
return &Instruction{Mnemonic: "RES 6, D", Length: 4, Address: 0xFFFF}, nil
case 0xB3:
return &Instruction{Mnemonic: "RES 6, E", Length: 4, Address: 0xFFFF}, nil
case 0xB4:
return &Instruction{Mnemonic: "RES 6, H", Length: 4, Address: 0xFFFF}, nil
case 0xB5:
return &Instruction{Mnemonic: "RES 6, L", Length: 4, Address: 0xFFFF}, nil
case 0xB6:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("RES 6, (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("RES 6, (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0xB7:
return &Instruction{Mnemonic: "RES 6, A", Length: 4, Address: 0xFFFF}, nil
// RES 7, r
case 0xB8:
return &Instruction{Mnemonic: "RES 7, B", Length: 4, Address: 0xFFFF}, nil
case 0xB9:
return &Instruction{Mnemonic: "RES 7, C", Length: 4, Address: 0xFFFF}, nil
case 0xBA:
return &Instruction{Mnemonic: "RES 7, D", Length: 4, Address: 0xFFFF}, nil
case 0xBB:
return &Instruction{Mnemonic: "RES 7, E", Length: 4, Address: 0xFFFF}, nil
case 0xBC:
return &Instruction{Mnemonic: "RES 7, H", Length: 4, Address: 0xFFFF}, nil
case 0xBD:
return &Instruction{Mnemonic: "RES 7, L", Length: 4, Address: 0xFFFF}, nil
case 0xBE:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("RES 7, (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("RES 7, (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0xBF:
return &Instruction{Mnemonic: "RES 7, A", Length: 4, Address: 0xFFFF}, nil
// SET b, r - Operate on registers (undocumented when prefixed with DD)
// SET 0, r
case 0xC0:
return &Instruction{Mnemonic: "SET 0, B", Length: 4, Address: 0xFFFF}, nil
case 0xC1:
return &Instruction{Mnemonic: "SET 0, C", Length: 4, Address: 0xFFFF}, nil
case 0xC2:
return &Instruction{Mnemonic: "SET 0, D", Length: 4, Address: 0xFFFF}, nil
case 0xC3:
return &Instruction{Mnemonic: "SET 0, E", Length: 4, Address: 0xFFFF}, nil
case 0xC4:
return &Instruction{Mnemonic: "SET 0, H", Length: 4, Address: 0xFFFF}, nil
case 0xC5:
return &Instruction{Mnemonic: "SET 0, L", Length: 4, Address: 0xFFFF}, nil
case 0xC6:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("SET 0, (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("SET 0, (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0xC7:
return &Instruction{Mnemonic: "SET 0, A", Length: 4, Address: 0xFFFF}, nil
// SET 1, r
case 0xC8:
return &Instruction{Mnemonic: "SET 1, B", Length: 4, Address: 0xFFFF}, nil
case 0xC9:
return &Instruction{Mnemonic: "SET 1, C", Length: 4, Address: 0xFFFF}, nil
case 0xCA:
return &Instruction{Mnemonic: "SET 1, D", Length: 4, Address: 0xFFFF}, nil
case 0xCB:
return &Instruction{Mnemonic: "SET 1, E", Length: 4, Address: 0xFFFF}, nil
case 0xCC:
return &Instruction{Mnemonic: "SET 1, H", Length: 4, Address: 0xFFFF}, nil
case 0xCD:
return &Instruction{Mnemonic: "SET 1, L", Length: 4, Address: 0xFFFF}, nil
case 0xCE:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("SET 1, (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("SET 1, (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0xCF:
return &Instruction{Mnemonic: "SET 1, A", Length: 4, Address: 0xFFFF}, nil
// SET 2, r
case 0xD0:
return &Instruction{Mnemonic: "SET 2, B", Length: 4, Address: 0xFFFF}, nil
case 0xD1:
return &Instruction{Mnemonic: "SET 2, C", Length: 4, Address: 0xFFFF}, nil
case 0xD2:
return &Instruction{Mnemonic: "SET 2, D", Length: 4, Address: 0xFFFF}, nil
case 0xD3:
return &Instruction{Mnemonic: "SET 2, E", Length: 4, Address: 0xFFFF}, nil
case 0xD4:
return &Instruction{Mnemonic: "SET 2, H", Length: 4, Address: 0xFFFF}, nil
case 0xD5:
return &Instruction{Mnemonic: "SET 2, L", Length: 4, Address: 0xFFFF}, nil
case 0xD6:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("SET 2, (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("SET 2, (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0xD7:
return &Instruction{Mnemonic: "SET 2, A", Length: 4, Address: 0xFFFF}, nil
// SET 3, r
case 0xD8:
return &Instruction{Mnemonic: "SET 3, B", Length: 4, Address: 0xFFFF}, nil
case 0xD9:
return &Instruction{Mnemonic: "SET 3, C", Length: 4, Address: 0xFFFF}, nil
case 0xDA:
return &Instruction{Mnemonic: "SET 3, D", Length: 4, Address: 0xFFFF}, nil
case 0xDB:
return &Instruction{Mnemonic: "SET 3, E", Length: 4, Address: 0xFFFF}, nil
case 0xDC:
return &Instruction{Mnemonic: "SET 3, H", Length: 4, Address: 0xFFFF}, nil
case 0xDD:
return &Instruction{Mnemonic: "SET 3, L", Length: 4, Address: 0xFFFF}, nil
case 0xDE:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("SET 3, (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("SET 3, (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0xDF:
return &Instruction{Mnemonic: "SET 3, A", Length: 4, Address: 0xFFFF}, nil
// SET 4, r
case 0xE0:
return &Instruction{Mnemonic: "SET 4, B", Length: 4, Address: 0xFFFF}, nil
case 0xE1:
return &Instruction{Mnemonic: "SET 4, C", Length: 4, Address: 0xFFFF}, nil
case 0xE2:
return &Instruction{Mnemonic: "SET 4, D", Length: 4, Address: 0xFFFF}, nil
case 0xE3:
return &Instruction{Mnemonic: "SET 4, E", Length: 4, Address: 0xFFFF}, nil
case 0xE4:
return &Instruction{Mnemonic: "SET 4, H", Length: 4, Address: 0xFFFF}, nil
case 0xE5:
return &Instruction{Mnemonic: "SET 4, L", Length: 4, Address: 0xFFFF}, nil
case 0xE6:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("SET 4, (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("SET 4, (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0xE7:
return &Instruction{Mnemonic: "SET 4, A", Length: 4, Address: 0xFFFF}, nil
// SET 5, r
case 0xE8:
return &Instruction{Mnemonic: "SET 5, B", Length: 4, Address: 0xFFFF}, nil
case 0xE9:
return &Instruction{Mnemonic: "SET 5, C", Length: 4, Address: 0xFFFF}, nil
case 0xEA:
return &Instruction{Mnemonic: "SET 5, D", Length: 4, Address: 0xFFFF}, nil
case 0xEB:
return &Instruction{Mnemonic: "SET 5, E", Length: 4, Address: 0xFFFF}, nil
case 0xEC:
return &Instruction{Mnemonic: "SET 5, H", Length: 4, Address: 0xFFFF}, nil
case 0xED:
return &Instruction{Mnemonic: "SET 5, L", Length: 4, Address: 0xFFFF}, nil
case 0xEE:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("SET 5, (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("SET 5, (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0xEF:
return &Instruction{Mnemonic: "SET 5, A", Length: 4, Address: 0xFFFF}, nil
// SET 6, r
case 0xF0:
return &Instruction{Mnemonic: "SET 6, B", Length: 4, Address: 0xFFFF}, nil
case 0xF1:
return &Instruction{Mnemonic: "SET 6, C", Length: 4, Address: 0xFFFF}, nil
case 0xF2:
return &Instruction{Mnemonic: "SET 6, D", Length: 4, Address: 0xFFFF}, nil
case 0xF3:
return &Instruction{Mnemonic: "SET 6, E", Length: 4, Address: 0xFFFF}, nil
case 0xF4:
return &Instruction{Mnemonic: "SET 6, H", Length: 4, Address: 0xFFFF}, nil
case 0xF5:
return &Instruction{Mnemonic: "SET 6, L", Length: 4, Address: 0xFFFF}, nil
case 0xF6:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("SET 6, (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("SET 6, (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0xF7:
return &Instruction{Mnemonic: "SET 6, A", Length: 4, Address: 0xFFFF}, nil
// SET 7, r
case 0xF8:
return &Instruction{Mnemonic: "SET 7, B", Length: 4, Address: 0xFFFF}, nil
case 0xF9:
return &Instruction{Mnemonic: "SET 7, C", Length: 4, Address: 0xFFFF}, nil
case 0xFA:
return &Instruction{Mnemonic: "SET 7, D", Length: 4, Address: 0xFFFF}, nil
case 0xFB:
return &Instruction{Mnemonic: "SET 7, E", Length: 4, Address: 0xFFFF}, nil
case 0xFC:
return &Instruction{Mnemonic: "SET 7, H", Length: 4, Address: 0xFFFF}, nil
case 0xFD:
return &Instruction{Mnemonic: "SET 7, L", Length: 4, Address: 0xFFFF}, nil
case 0xFE:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("SET 7, (IX+$%02X)", disp), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("SET 7, (IX-$%02X)", -disp), Length: 4, Address: 0xFFFF}, nil
}
case 0xFF:
return &Instruction{Mnemonic: "SET 7, A", Length: 4, Address: 0xFFFF}, nil
default:
if disp >= 0 {
return &Instruction{Mnemonic: fmt.Sprintf("DD CB $%02X $%02X", disp, cbOpcode), Length: 4, Address: 0xFFFF}, nil
} else {
return &Instruction{Mnemonic: fmt.Sprintf("DD CB -$%02X $%02X", -disp, cbOpcode), Length: 4, Address: 0xFFFF}, nil
}
}
case 0xE1:
return &Instruction{Mnemonic: "POP IX", Length: 2, Address: 0xFFFF}, nil
case 0xE3:
return &Instruction{Mnemonic: "EX (SP), IX", Length: 2, Address: 0xFFFF}, nil
case 0xE5:
return &Instruction{Mnemonic: "PUSH IX", Length: 2, Address: 0xFFFF}, nil
case 0xE9:
return &Instruction{Mnemonic: "JP (IX)", Length: 2, Address: 0xFFFF}, nil
case 0xF9:
return &Instruction{Mnemonic: "LD SP, IX", Length: 2, Address: 0xFFFF}, nil
default:
// Try to decode as unprefixed instruction with IX
inst, err := d.decodeUnprefixed(opcode, data[1:])
if err != nil {
return nil, err
}
// Adjust length for DD prefix
inst.Length++
return inst, nil
}
}
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