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TT15.002
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1991-08-21
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AMI TECH TIP
TECH TIP NO. 15.002
DATE: July 8, 1991
BOARD TYPE: Series 15, SCSI Host Adapter
BOARD REVISION: D and D1
BOARD FREQUENCY: N/A
ORIGINATOR: Sam Williams, AMI Tech Support
RELEASED BY: Documentation Control
With the current drivers available for the Fast Disk SCSI Host Adapter,
you are limited to 16MB of motherboard memory. This is true for all
operating systems except for SCO UNIX and SCO XENIX. The reason is that
the Adaptec 154X drivers use 24-bit addresses. If you try to address
memory above 16MB, it will loop around and write over low memory. The
drivers built into SCO UNIX and XENIX are designed to handle thissituation.
As soon as we have 32-bit drivers available you will be able to use all
motherboard memory. We will let you know when they are ready.
If you have any problems or questions please call Tech Support.