Difference between revisions of "Operand"
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0001:4C 00 10 JMP $1000 ; Moves the program counter to $1000. | 0001:4C 00 10 JMP $1000 ; Moves the program counter to $1000. | ||
| − | In this example, [[DEX]] is the opcode, but there is | + | In this example, [[DEX]] is the opcode, but there is no operand since it is implied from the opcode. |
0001:CA DEX ; Decrements the X index register. | 0001:CA DEX ; Decrements the X index register. | ||
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| + | [[Category: Guides]] | ||
| + | [[Category: Assembly]] | ||
Latest revision as of 19:16, 24 March 2016
An operand is the data portion of a 6502 assembly instruction. This is to be distinguished from the opcode, which specifies the operation to perform.
Examples
In the example below, JMP is the opcode, $1000 is the operand, and the two combined is the instruction.
0001:4C 00 10 JMP $1000 ; Moves the program counter to $1000.
In this example, DEX is the opcode, but there is no operand since it is implied from the opcode.
0001:CA DEX ; Decrements the X index register.
