Editing Addressing mode (section)

===Register indirect===
    +-------+-----+
    |jumpVia| reg |
    +-------+-----+
 
    (Effective PC address = contents of register 'reg')

The effective address for a register indirect instruction is the address in the specified register. For example, (A7) to access the content of address register A7.

The effect is to transfer control to the instruction whose address is in the specified register.

Many RISC machines, as well as the CISC [[IBM System/360]] and successors, have subroutine call instructions that place the [[return statement|return address]] in an address register—the register indirect addressing mode is used to return from that subroutine call.