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DEC: Difference between revisions
From SnesLab
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'''DEC''' (Decrement) is a 65x instruction that decrements the value in the location specified by the operand. | '''DEC''' (Decrement) is a 65x instruction that decrements the value in the location specified by the operand. | ||
{| class="wikitable" style="float:right;clear:right;width:30%" | |||
!colspan="8"|Basic Info | |||
|+ | |||
|'''Addressing Mode''' | |||
|'''Opcode''' | |||
|'''Length''' | |||
|'''Speed''' | |||
|+ | |||
|accumulator | |||
|3A | |||
|1 byte | |||
|2 cycles | |||
|+ | |||
|absolute | |||
|CE | |||
|3 bytes | |||
|6 cycles | |||
|+ | |||
|direct page | |||
|C6 | |||
|2 bytes | |||
|5 cycles | |||
|+ | |||
|absolute indexed X | |||
|DE | |||
|3 bytes | |||
|7 cycles | |||
|+ | |||
|direct page indexed X | |||
|D6 | |||
|2 bytes | |||
|6 cycles | |||
|} | |||
{| class="wikitable" style="float:right;clear:right;width:30%" | {| class="wikitable" style="float:right;clear:right;width:30%" | ||
Revision as of 18:06, 1 May 2023
DEC (Decrement) is a 65x instruction that decrements the value in the location specified by the operand.
| Basic Info | |||||||
|---|---|---|---|---|---|---|---|
| Addressing Mode | Opcode | Length | Speed | ||||
| accumulator | 3A | 1 byte | 2 cycles | ||||
| absolute | CE | 3 bytes | 6 cycles | ||||
| direct page | C6 | 2 bytes | 5 cycles | ||||
| absolute indexed X | DE | 3 bytes | 7 cycles | ||||
| direct page indexed X | D6 | 2 bytes | 6 cycles | ||||
| Flags Clobbered | ||||||||
|---|---|---|---|---|---|---|---|---|
| N | V | M | X | D | I | Z | C | |
| . | . | . | . | . | . | |||