6510/65816 Addressing mode: Stack (Push) -- s

 (PHA,PHB,PHD,PHK,PHP,PHX,PHY)
 (1 byte)  (3 and 4 cycles)

    +---------------+------------------+-----------------------+----------+
    |     Cycle     |   Address Bus    |       Data Bus        |Read/Write|
    +---------------+------------------+-----------------------+----------+
    |           1   |  PBR,PC          | Op Code               |    R     |
    |           2   |  PBR,PC+1        | Internal Operation    |    R     |
    |       (1) 3a  |  0,S             | Register High         |    W     |
    |           3   |  0,S-1           | Register Low          |    W     |
    +---------------+------------------+-----------------------+----------+
    (1) Add 1 cycle for M=0 or X=0 (i.e. 16 bit data).

    See also: Abbreviations