Change program counter to memory value

Operation

[PC + 1] → PCL [PC + 2] → PCH

Table

JMP | Jump Indirect
==================================================

[PC + 1] → PCL                    N V - B D I Z C
[PC + 2] → PCH                    - - - - - - - -

addressing       assembler      opc  bytes  cycles
--------------------------------------------------
absolute         JMP $nnnn       4C    3      3
(indirect)       JMP ($nnnn)     6C    3      6
(indirect,X)     JMP ($nnnn,X)   7C    3      6