The Check Bit command  checks one or more bits  in a byte for an  on or
off  value ('1'  or '0').   The bit  positions are  labeled 1-8  with 1
being  the high order  bit.  TAA9892 is  sent if the  bits do not match
the requested values.

A typical command would be:

            CHKBIT     BYTE(&BYTE) BIT1(*ON) BIT3(*OFF)

If Bit 1  is not '1' or  Bit 3 is not  '0', the TAA9892 escape  message
is sent.   Preceding diagnostic message  describe each bit  that is not
set  as requested.   The bits  that are  not described  default to *ANY
meaning they may have any value.

If all  bits  are set  as  requested,  the command  completes  normally
without any messages.

CHKBIT  escape messages you can monitor for
-------------------------------------------

      TAA9892    The bits do match as requested.

Escape messages from based on functions will be re-sent.

CHKBIT Command parameters                             *CMD
-------------------------

   BYTE          A  required *CHAR  LEN(1)  value for  the  byte to  be
                 checked.    A  variable may  be  used.   When  command
                 prompting is used,  you can expand  the length of  the
                 input field by entering & and pressing Enter.

   BIT1          The  value to  be  matched  for  Bit 1  (high  order).
                 *ANY is  the default meaning  the value may  be '1' or
                 '0'.

                 *ON may be specified to check for '1'.

                 *OFF may be specified to check for '0'.

   BIT2          The  value  to be  matched  for Bit  2.   *ANY  is the
                 default meaning the value may be '1' or '0'.

                 *ON may be specified to check for '1'.

                 *OFF may be specified to check for '0'.

   BIT3          The value  to  be matched  for  Bit 3.    *ANY is  the
                 default meaning the value may be '1' or '0'.

                 *ON may be specified to check for '1'.

                 *OFF may be specified to check for '0'.

   BIT4          The  value to  be  matched for  Bit  4.   *ANY is  the
                 default meaning the value may be '1' or '0'.

                 *ON may be specified to check for '1'.

                 *OFF may be specified to check for '0'.

   BIT5          The  value  to be  matched  for Bit  5.   *ANY  is the
                 default meaning the value may be '1' or '0'.

                 *ON may be specified to check for '1'.

                 *OFF may be specified to check for '0'.

   BIT6          The value  to  be matched  for Bit  6.   *ANY  is  the
                 default meaning the value may be '1' or '0'.

                 *ON may be specified to check for '1'.

                 *OFF may be specified to check for '0'.

   BIT7          The  value to  be  matched for  Bit 7.    *ANY is  the
                 default meaning the value may be '1' or '0'.

                 *ON may be specified to check for '1'.

                 *OFF may be specified to check for '0'.

   BIT8          The value  to be matched for Bit  8 (low order).  *ANY
                 is the default meaning  the value may  be '1' or  '0'.

                 *ON may be specified to check for '1'.

                 *OFF may be specified to check for '0'.


Restrictions
------------

None.

Prerequisites
-------------

The following TAA Tools must be on your system:

     CVTBYTBIT       Convert byte to bits
     SNDDIAGMSG      Send diagnostic message
     SNDESCINF       Send escape information
     SNDESCMSG       Send escape message

Implementation
--------------

None, the tool is ready to use.

Objects used by the tool
------------------------

   Object        Type    Attribute      Src member    Src file
   ------        ----    ---------      ----------    ----------

   CHKBIT        *CMD                   TAACLTM       QATTCMD
   TAACLTMC      *PGM       CLP         TAACLTMC      QATTCL