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This is the R.O.M.E.68000 Manual version 0.51.
This is an experimental version.
Copyright © 1997 by G. Mezzetti; last update: January 1, 1999.

Ordinary Instructions of the ``Control'' Class

Jump if Not an Alterable Data item

Mnemonic:

JNAD

Operands:

A,B

Oper.	Addressing Group	Op. Use	Mult. Op.
A	jadr	a	-
B	muladr	w	-

Instruction Key:

6C

Formal Description:

if IsNotAnADI(B) then
   @(A) --> IP {jump to A}
end if.

Informal Description

This instruction jumps to A if and only if B is not an alterable data item, and hence helps you to hunt your opponent's a.d.i.'s. It is useful only in the context of Core Cold War, since otherwise you will prefer to use for the same purpose the much more efficient CHKDBW instruction.

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