65816 Addressing mode: Stack Relative -- d,s

 (ADC,AND,CMP,EOR,LDA,ORA,SBC,STA)
 (2 bytes)  (4 and 5 cycles)

    +---------------+------------------+-----------------------+----------+
    |     Cycle     |   Address Bus    |       Data Bus        |Read/Write|
    +---------------+------------------+-----------------------+----------+
    |           1   |  PBR,PC          | Op Code               |    R     |
    |           2   |  PBR,PC+1        | Stack Offset          |    R     |
    |           3   |  PBR,PC+1        | Internal Operation    |    R     |
    |           4   |  0,S+SO          | Data Low              |   R/W    |
    |       (1) 4a  |  0,S+SO+1        | Data High             |   R/W    |
    +---------------+------------------+-----------------------+----------+
    (1) Add 1 cycle for M=0 or X=0 (i.e. 16 bit data).

    See also: Abbreviations