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PHX: Difference between revisions

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'''PHX''' is a [[65c816]] instruction that pushes the value of the [[X index register]] onto the [[stack]].
'''PHX''' is a [[65c816]] instruction that pushes the value of the [[X index register]] onto the [[stack]].  If X is 16 bits wide, the high byte is pushed first.


===== Cycle Penalty =====
===== Cycle Penalty =====

Revision as of 06:12, 7 December 2023

Basic Info
Addressing Mode Opcode Length Speed
Stack (Push) DA 1 byte 3 cycles*
Flags Affected
N V M X D I Z C
. . . . . . . .

PHX is a 65c816 instruction that pushes the value of the X index register onto the stack. If X is 16 bits wide, the high byte is pushed first.

Cycle Penalty
  • PHX takes one additional cycle if the index registers are 16 bits wide.

See Also

External Links