when i use the test program with an ISA soundcard, things work exactly
as i expected: we get a smooth stepping as the patterns are erased.
however, when i use it with a PCI soundcard, quite often the pattern
erasing skips a pattern or two. lets say i wrote 128 copies of my 4
byte pattern throughout the ADC buffer. i would expect them to erased
in order. But instead, if i was waiting for pattern #10 to be erased,
i will find that pattern #11 has been overwritten but pattern #10 is
still in place.
i am at a loss to understand anything that could cause this. the
skipping is pretty random, and typically, when cycling through the
buffer, it will happen 2-3 times out of, say, 256 patterns.
h/w info:
dual PII-450 on a supermicro P6DGU motherboard
onboard SCSI 7890UW controller
matrox G200 AGP video
tropez+ ISA soundcard (CS4231 ADAC)
hoontech 4DWave soundcard (Trident 4D-NX ADAC)
no other PCI devices
thanks for any suggestions
--p
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