mirror of https://github.com/ariejan/i6502.git
29 lines
977 B
Go
29 lines
977 B
Go
package i6502
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import (
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"fmt"
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)
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type Instruction struct {
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OpType // Embed OpType
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Op8 byte // 8-bit operand for 2-byte instructions
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Op16 uint16 // 16-bit operand for 3-byte instructions
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Address uint16 // Address location where this instruction got read, for debugging purposes
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}
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// Return a string containing debug information about the instruction and operands.
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func (i Instruction) String() (output string) {
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switch i.Size {
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case 1:
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output = fmt.Sprintf("~~~ 0x%04X: 0x%02X - %s [%s] {%d}\n", i.Address, i.Opcode, instructionNames[i.opcodeId], addressingNames[i.addressingId], i.Cycles)
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case 2:
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output = fmt.Sprintf("~~~ 0x%04X: 0x%02X - %s 0x%02X [%s] {%d}\n", i.Address, i.Opcode, instructionNames[i.opcodeId], i.Op8, addressingNames[i.addressingId], i.Cycles)
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case 3:
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output = fmt.Sprintf("~~~ 0x%04X: 0x%02X - %s 0x%04X [%s] {%d}\n", i.Address, i.Opcode, instructionNames[i.opcodeId], i.Op16, addressingNames[i.addressingId], i.Cycles)
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}
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return
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}
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