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Enabling Bus Mastering for IDE/ATAPI Devices
Your system shipped with bus mastering for IDE/ATAPI devices enabled. If you reinstall
Windows NT 4.0 and Service Pack software, you must re-enable IDE/ATAPI bus mastering.
NOTE
If you install a CD-Recorder (CD-R) drive, do not enable IDE/ATAPI bus mastering.
The CD-R drive is incompatible with IDE/ATAPI bus mastering.
NOTE
The QFE update software includes an updated ATAPI device driver that should be
installed after the Service Pack software.
NOTE
For reasons of system performance, if you install a TR-4i tape drive or a Zip drive, do
not enable DMA use on the IDE channel to which the drive is connected.
To enable IDE/ATAPI bus mastering:
1.
Ensure that the operating system, Service Pack software, and QFE update software (
QFE
_
NT
*)
are installed.
2.
Insert the Windows NT 4.0 Service Pack CD-ROM into your system’s CD-ROM drive.
3.
In Explorer or File Manager, go to the \
SUPPORT
\
UTILS
\
I386
directory.
4.
Double-click
DMACHECK
.
EXE
. The ATAPI DMA support dialog displays.
5.
The Current DMA Usage boxes indicate which channels have IDE/ATAPI devices. For each
channel with an IDE/ATAPI device, click Enabled; then click OK.
6.
Restart the system.
Updating the Operating System
Microsoft Service Packs and Service Releases contain the latest improvements and system fixes for
Microsoft operating systems. Service Packs and Releases are created by Microsoft for post-release
support. You can obtain them from Microsoft’s World Wide Web and FTP sites free of charge.
CAUTION
If a Service Pack is posted to Intergraph Computer Systems’ online services, it has
been certified for use as described in the announcement of its availability. If you
obtain a Service Pack from any other source, be aware that it may not be certified
against your hardware.
