PHP

From C64-Wiki
Jump to: navigation, search

PHP (short for "PusH Processor flags") is the mnemonic for a machine language instruction which stores the current state of the processor status flags 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
8 08 Implied PHP 1 3

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

CPU flags[edit]

PHP does not affect any of the flags; it merely copies them onto the stack.