Operation: JNB Function: Jump if Bit Not Set Syntax: JNB bit addr,reladdr Instructions OpCode Bytes Cycles Flags JNB bit addr,reladdr 0x30 3 2 None Description: JNB will branch to the address indicated by reladdress if the indicated bit is not set. If the bit is set program execution continues with the instruction following the JNB instruction. See Also: JB, JBC, Instruction Set (C) Copyright 1997 - 2008 by Vault Information Services LLC. All Rights Reserved. Information provided "as-is" without warranty. Please see details. Contact us for usage and copy permission.