65816 Addressing mode: Stack (PEI) -- s

 (PEI)
 (2 bytes)  (6 and 7 cycles)

    +---------------+------------------+-----------------------+----------+
    |     Cycle     |   Address Bus    |       Data Bus        |Read/Write|
    +---------------+------------------+-----------------------+----------+
    |           1   |  PBR,PC          | Op Code               |    R     |
    |           2   |  PBR,PC+1        | Direct Offset         |    R     |
    |       (2) 2a  |  PBR,PC+1        | Internal Operation    |    R     |
    |           3   |  0,D+DO          | Absolute Address Low  |    R     |
    |           4   |  0,D+DO+1        | Absolute Address High |    R     |
    |           5   |  0,S             | Absolute Address High |    W     |
    |           6   |  0,S-1           | Absolute Address Low  |    W     |
    +---------------+------------------+-----------------------+----------+
    (2) Add 1 cycle for direct register low (DL) not equal 0.

    See also: Abbreviations