BRK                          BRK Force Break                          BRK

  Operation:  Forced Interrupt;                         N Z C I D V
              PC + 2 to Stack, P to Stack               . . . 1 . .
                                 (Ref: 9.11)
  +----------------+-----------------------+---------+---------+----------+
  | Addressing Mode| Assembly Language Form| OP CODE |No. Bytes|No. Cycles|
  +----------------+-----------------------+---------+---------+----------+
  |  Implied       |   BRK                 |   $00   |    1    |    7     |
  +----------------+-----------------------+---------+---------+----------+
  1. A BRK command cannot be masked by setting I.