                                8/8 CLA HELP
                                ============

    The 8/8CLA hardware and software allow you to create up to eight
digital outputs (each with a sequence of 64 bits), and sense up to eight
digital inputs.  The device being driven and sensed can be TTL, or CMOS
powered by between 5 and 15 volts.  The inputs and outputs are displayed
on a logic analyzer type screen with the oldest data on the left.  With
8/8CLA, you can:

   o Program Output Sequences (up to 64 bits, or samples) on each of the
     eight Output lines.

   o Select sequencing (Delay) speed from 0.1 to 10.0 seconds (finer
     adjustments can be accomplished with the Readtime sub-function).

   o Use the computer as the clocking signal (synchronous mode), or use
     the circuit's signals as the clock (asynchronous mode) .

   o Capture the resultant inputs on the eight Input Lines.

   o Save Program Sequences, with input data, and retrieve them for
     later use.

   o View any stored Program Sequence, with input data, by identifying
     its file name.

   o View a list of Program Sequence file names on the current 
     directory.

    Data is shown in a logic analyzer window.  The display contains
a moving dot which shows where you are in the sampling sequence.  

    All functions, what they do, and how to call them are shown in the
table below.


FUNCTION NAME       KEYS     WHAT IT DOES
------------------- -------- ------------------------------------------
FILE                <ALT-F>  Selects the following File sub-functions

        Load        L        Loads (Opens) a previously saved analysis
                             file.  Output sequences in the file are
                             placed in memory for use during analysis.

        Save        S        Saves the most recent analysis scan to
                             disk, including input and output.

        View        V        Loads a previously saved analysis file and
                             displays the inputs and outputs.  Marker
                             allows visual on-screen comparison.

        Dos Shell   D        Temporary transfer to DOS.  Typing EXIT and
                             pressing Enter returns to program.

        Exit        X        Ends program.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
EDIT                <ALT-E>  Selects the following Edit sub-functions.
        Outputs     O        Allows programming of each bit in the 64
                             bit sequence for each of output channels
                             1 through 8.

        Delay       D        Allows adjustment of scan time between
                             subsequent bits between 0.0 and 10.0
                             seconds.

        Trig Mode   T        Allows selection of synchronous or
                             asynchronous mode.  When in asynchronous
                             mode, you can select Positive or Negative
                             edge trigger pulse to trigger on.

        Readtime    R        Allows adjustment of time between the
                             programs setup to ask for parallel port
                             data, and the time the data are requested.
                             A fine tuning Delay function.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 
ANALYZE             <ALT-A>  Initiates the logic analysis function
-----------------------------------------------------------------------


                           8/8CLA CONTROL FILE
                           -------------------

    On startup, the 8/8CLA program reads a control file named 88CLA.DAT.
This file contains the following information in text form:

888 : Parallel Port Address
45  : ASCII Value of Character to be used as a High Display Indication
1   : Pulse Stretch Factor
No  : Display Startup Message (Yes or No)

The first entry is the decimal address for the parallel port to which
the 8/8CLA will interface.  If you are unsure of your parallel port 
address, check your PC documentation.

The second entry indicates the ASCII character code for the character
that will represent a logic high.  ASCII 45 is a dash (-).  You can try
other ASCII codes to see which is most pleasing to you.

The third entry is the Readtime initial value.  This value can be
changed with the Readtime sub-function.  However, once you find a
comfortable value, you might like to change the 88CLA.DAT file to have
that value pre-loaded each time you start the program.

The fourth and final entry is either the word Yes or No.  A No entry
will eliminate the startup message containing initial instructions and
copyright information.


                          (c) 1996, JJ Barbarello
                   817 Tennent Road, Manalapan, NJ 07726
                              (908)  536-5499

