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The PC-SIG Library 9
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The PC-SIG Library on CD ROM - Ninth Edition.iso
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DISK0893
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DIAGNOSE.DOC
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1988-01-15
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2KB
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56 lines
RS232 TEST
This program will test various RS232 hardware functions. If it runs OK
then The Weak Link and The $25 Network should run on the hardware.
1) hook up the cable between machines
2) run TMT.COM on one machine
3) run RCV.COM on the other machine
4) the screen will display all errors
RCV runs continuosly until any key is pressed. It prints "z" characters while
the other machine is dormant. TMT runs once and then exits to DOS. Both
programs assume you are using COM1 to communicate. If not then enter the COM
number on the command line when you run the program:
A>TMT COM1
or
A>RCV COM2
or
A>TMT 3
The TMT program initiates the test. The 1st test is to make sure the
COM number you specify is really installed. Then each RS232 card that is
installed is printed out along with its hardware port address. The total
number of ports is then printed. (To find out what ports are on a machine, run
RCV.) The 2nd test is of the data channel. If this test fails then the cable
may be bad, or it may not be a null modem cable, or it may be hooked up to the
wrong port. MAKE SURE YOU DO NOT HAVE TWO CARDS INSTALLED AT THE SAME PORT
ADDRESS. Unfoutunately a program cannot test for this possibility. But with
the proliferation of Multi I/O cards it is a common mistake to put two
different cards in a computer with the same RS232 port address. If your
computer has more RS232 connectors than the number of ports RCV shows you have
installed then it is possible you have 2 ports at one address.
After the data line test is the DSR-DTR line test. If this test fails
then the cable you have is probably missing these two lines or they are not
crossed between the machines.
The last test is a string transfer from RCV to TMT. The test string
will be printed to the TMT screen. If this message appears then the test is
good and "CHECK OK" will be printed to both screens. If you encounter errors
which you cannot decipher or fix then please call.
Don Jindra, Owner
Information Modes
P.O. Drawer F
Denton, Texas 76202
Ph. 817-387-3339