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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 ``Block of Words'' Class

CHecK for alterable Data items--Block of Words

Mnemonic:

CHKDBW

Operands:

L,A

Oper.	Addressing Group	Op. Use	Mult. Op.
L	blnadr	d	-
A	adrbw	w	v

Instruction Key:

F0

Formal Description:

if ContainsOnlyADIs(A[L]) then
   IP + 1 --> IP {skip next instruction}
end if.

Informal Description

This instruction checks a block of words: if it is entirely made up of alterable data items, one instruction is skipped, otherwise it is not.

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