Operation: JB Function: Jump if Bit Set Syntax: JB bit addr, reladdr Instructions OpCode Bytes Cycles Flags JB bit addr,reladdr 0x20 3 2 None Description: JB branches to the address indicated by reladdr if the bit indicated by bit addr is set. If the bit is not set program execution continues with the instruction following the JB instruction. See Also: JBC, JNB. 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.