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PHA

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Basic Info
Addressing Mode Opcode Length Speed
Stack (Push) 48 1 byte 3 cycles*
Flags Affected
N V M X D I Z C
. . . . . . . .

PHA (PusH Accumulator) is a 65x instruction that pushes the value in the accumulator to the stack. If the accumulator is 16 bits wide, the high byte is pushed first. The stack pointer is decremented by the number of bytes pushed.

No flags are affected.

Syntax

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

See Also

External Links