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CHAPTER 5: Driver Options
5. Driver Options
The configuration files for the Modular Parallel
Adapter’s drivers allow you enable, disable, and set
values for the following options:
• POLLING—A PC may use either IRQ7 or IRQ5 for
handling parallel-port communications. If you need
to work without interrupts (usually only with test
evaluations), delete the semicolon in this line. This
will force the driver to operate in a polled mode
without using hardware interrupts.
• UNIDIR—Whenever the SETODI driver is loaded into
memory, it tests the parallel port to determine whether
it can be operated in the faster bidirectional mode.
The Adapter is then configured according to the test
results. However, when you use a long extension cable
or a low-quality parallel port, the bidirectional mode
may not operate reliably, even if the test passes. In this
case, you should force the unidirectional mode by
deleting the semicolon in this line.
• LPT
n
—The ODI driver for the Adapter is normally
auto-configuring, automatically detecting the
correct port to be used. But to specify the exact
parallel port that the SETODI driver should work
