We've just updated MediaWiki and its underlying software. If anything doesn't look or work quite right, please mention it to us. --RanAS

PLA: Difference between revisions

From SnesLab
Jump to: navigation, search
(→‎External Links: de n'd page number)
(made flags affected more prominent)
Line 25: Line 25:
|[[Carry Flag|C]]
|[[Carry Flag|C]]
|+
|+
|
|N
|.
|.
|.
|.
Line 31: Line 31:
|.
|.
|.
|.
|
|Z
|.
|.
|}
|}

Revision as of 06:07, 25 July 2024

Basic Info
Addressing Mode Opcode Length Speed
Stack (Pull) 68 1 byte 4 cycles*
Flags Affected
N V M X D I Z C
N . . . . . Z .

PLA (PulL Accumulator) is a 65x instruction that pulls the value at the top of the stack into the accumulator. PLA increments the stack pointer before the pull. If the accumulator is 16 bits wide, the low byte is pulled and then the high byte is pulled.

The Eyes & Lichty page on PLA has a typo that says the 65x pull instructions "set" the zero and negative flags; it should say "affect."

The negative flag will then match the most significant bit of the pulled value. The zero flag will indicate whether the pulled value is zero.

Syntax

PLA
Cycle Penalty
  • PLA takes one extra cycle if the accumulator is 16 bits wide.

See Also

External Links