65816 Addressing mode: Wait for Interrupt -- h

 (WAI)
 (1 byte)  (3 cycles)

    +---------------+------------------+-----------------------+----------+
    |     Cycle     |   Address Bus    |       Data Bus        |Read/Write|
    +---------------+------------------+-----------------------+----------+
    |           1   |  PBR,PC          | Op Code               |    R     |
    |       (9) 2   |  PBR,PC+1        | Internal Operation    |    R     |
    |           3   |  PBR,PC+1        | Internal Operation    |    R     |
    |   IRQ,NMI 1   |  PBR,PC+1        | IRQ(BRK)              |    R     |
    +---------------+------------------+-----------------------+----------+
    (9) Wait at cycle 2 for 2 cycles after /NMI or /IRQ active input.

    See also: Abbreviations