PC Gamer (Italian) 24/PC Gamer IT CD 24 2-2.iso/patches/dmatest/DMATEST.TXT

Text File | 1997-10-10 | 1KB | 28 lines

This is a quick sanity check of DMA and Verite in your system.
Run this in DOS or a DOS box. The two .voh files must be in
the same directory as dmatest.exe.

The test checks if the Verite busmastering capability is enabled at the
time the test is run (i.e., you may need to try it in DOS, in a
Windows-shutdown-to-DOS, or in a DOS box; each of these has been
known to give different results.) Some system BIOSes have been
known to disable busmastering even though the Verite chip supports it.

The test then checks if bus snooping is working. Some older
motherboards do not implement this correctly, and DMA will fail
to work properly. If you have such a system, you must explicitly
disable DMA for the Verite chip. See your board vendor for
instructions that may be specific to the Windows drivers you use.

Finally, the test measures approximate FIFO and DMA performance
(the numbers should be considered only +/- 10% accurate.) A
"Test completed successfully." message means that DMA should run just
fine on your system in that particular configuration.

You may be able to improve your DMA performance by adjusting the value
of the PCI latency timer. Increasing it can improve the numbers
reported. Changing that timer, however, may have unforseen effects
on your system.