PHA

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PHA (short for "PusH Accumulator") is the mnemonic for a machine language instruction which stores a copy of the current content of the accumulator onto the stack, and adjusting the stack pointer to reflect the addition.

Addressing mode[edit]

Opcode Addressing
mode
Assembler
format
Length
in bytes
Number of
cycles
Dec Hex
72 48 Implied PHA 1 3

PHA only supports the Implied addressing mode, as shown in the table at right.

CPU flags[edit]

PHA does not affect any of the CPU's status flags.