Internal Hardware Test; Internal Buffer Test - M-Audio Portman 4x4 Manual

The diagnostic software user interface is quite simple. Just use
the arrow keys to move from one line to the next and the <Enter>
key to move through the different options for each line until they
match the desired values. Move the cursor to the "Run Tests" line
and press the "Enter" key. P4X4DIAG.EXE will then test the fol-
lowing four areas:

1. Internal Hardware Test

This will indicate whether the PORTMAN, your computer, and
the Centronics cable are all connected properly and working. If
working successful, the test will return the PORTMAN's internal
firmware revision number.
If your PORTMAN fails this test, it could mean a bad PORTMAN
or other hardware failure, but most often it means one of a few
very specific things:
a.) You have the incorrect port settings in the diagnostic program.
b.) PORTMAN power is not properly connected.
c.) Your cable is not fully Centronics compatible or is defective.
d.) Your computer's parallel port is configured incorrectly or is
defective.
e.) You need to adjust the Delay Pulse setting starting at 75 and
run the test again. If it fails then keep adjusting by increments
of 25 until it passes. This is due to the speed of the parallel
port.

2. Internal Buffer Test

This test checks the PORTMAN's ability to handle the flow of
data through its internal circuitry and across the parallel cable. If
it fails, it most often is due to one or more of the following:
a.) Your computer's parallel port is slightly slower than the
PORTMAN, and you need to compensate by increasing the
Delay Pulse setting in the diagnostic software.
b.) Your computer's parallel port mode is not set to match the
H/W Mode setting in the diagnostic program.
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