cmd line lpt port troubleshooting

  • Thread starter Thread starter BKR
  • Start date Start date
B

BKR

Does anyone know the best method to troubleshoot a lpt
port. I suspect a hardware problem, no errors in device
manager or event viewer. I thought there were some old
DOS commands to check serial/parallel port connections.
Thanks.
 
To test whether the ports on your computer are working, first
1. Type DEBUG (at a DOS prompt).
2. At the hyphen, type D40:00.

You can determine if the port is active by checking this print out. the port
address shows the port is active, 00 00 shows it is not recognised. The
example below this shows LPT1 (78 03) active.

LPT1
0040:0000 F8 03 F8 02 00 00 00 00- 78 03 00 00 00 00 1F 05
0040:0010 61 C4 B0 7C 02 00 01 60- 00 00 2A 00 2A 00 34 05
 
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