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I'
1l
PCI/I-486SP3G
User's Manual
The SCSI Controller
As mentioned
above,
this mainboard has an on-board SCSI in-
terface. The interface is controlled by an NCR 53C810 PCI Fast
SCSI-
2 controller and the NCR SCSI firmware recorded in the BIOS flash
ROM chip. The SCSI controller is a full 32-bit PCI DMA bus master
and supports the ASP! and CAM standards.
You can connect a chain of up to seven devices to the SCSI inter-
face. The standard version of the interface is for "internal" devices
installed in your system case. The number of internal devices you can
connect is therefore likely to be limited by the space limitations of
your case. The standard cable provided with the mainboard is for two
internal devices.
You can also obtain an optional PCI bus SC200 SCSI interface card
that provides both internal and external connectors. With this card
you can connect both internal and external SCSI devices to your sys-
tem. Theare details on this card in Chapter 4.
Two floppy disks with support drivers for the SCSI firmware and
controller come with your mainboard. There is detailed information
about the drivers in "ReadMe" files on the disks. There is more
in-
formation about these disks in the section on "SCSI BIOS
&
Drivers"
in Chapter
3.
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Upgrade Guide
This section explains how to install options on your
ma.inboard.
It
covers the most likely and technically accessible upgrades you
might want to do, including adding expansion cards, increasing sys-
tem memory, changing the CPU chip and adding IDE or SCSI hard
disks and other SCSI peripherals.
Installing upgrades will either improve the performance of your
computer, or add some additional capabilities to it. You can install
upgrades yourself, or have your dealer or a qualified computer tech-
nician do it for you.
It
is also possible to increase the size of the Level 2 cache, but since
this is a much more technically demanding upgrade that you are both
less likely to w1dertake and in most cases would probably require at
least partially disassembling your system, the technical reference in-
formation about it is in Chapter
4.
It is probably best to have a quali-
fied technician perform the upgrade for you if you want to upgrade
the cache.
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