>> Ultra IDE/NT 4.0.
Thanks, Len. After poking around (quite abit <g>), I found
the following tentative info, FWIW.
According to the Microsoft Knowledge Base articles Q158873
and Q164378, I found that Microsoft does in fact claim
that the SP4 Atapi driver (as well as late-issue
SP3-hotfix Atapi) does in fact support Busmastering
and UDMA/33. The trouble is, it's not enabled.
DMACHECK.exe will edit the registry to enable busmastering.
The key is
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services
\Atapi\Parameters\DeviceX, where X is 0 for the primary
IDE controller and 1 for the secondary.
The data value is a REG_SZ (yeah, string) value named
DmaDetectionLevel, with a string value of 0x0, 0x1, or
0x2 for DMA off, On, or Force On. The Force-On value
came from your reference. DMACHECK.exe will only
set values 0x0 or 0x1, apparently.
There are old Intel drivers available too. I haven't
poked too much here, but one place is
www.abit.com.tw/html/load06.htm, download file
PIIX412.exe, about 1.2 MB. Has drivers for NT, 95,
and OS2. Dunno as I'd use them on BX6 or BH6, though. ABIT
doesn't claim they support those mobos. The benchmarks
on the URL you pointed me to did use one of the supported mobos.
Anyhow, DMACHECK.exe answers my original question. Sent you
a PM, but don't bother responding if you haven't, since
I got DMACHECK.
It does verify I'm not using bus mastering, as I suspected
but never followed up on. I haven't tried enabling it
yet. When I do, I will report the results here, assuming
I recover from the trial <G>.
Thanks for the responses.
Regards,
Spots |
