BusLogic BT-956C, User Manual

Q. I am connecting a SCSI tape drive to the 

 adapter, what de-

vice driver do I need to load?

A. You need to load 

 DOS Manager driver in CONFIG.SYS as

follows:

You also need tape backup application software from a third party,

such as Central Point or Sytos.

Q. I have a large capacity (more than 

 drive. When I run FDISK, it

recognizes only 1 GB capacity. What is the problem?

A. Make sure you enable the DOS   1 GB option in the 

 Config-

uration Menu. If an EISA card, you need to run the EISA configuration

file and enable Disk   1 GB support.

Q.

I have a floppy tape backup and it runs very slowly with the 

ic SCSI adapter. What should I do?

A. When you load 

 DOS manager, use the 

 switch to re-

duce bus on time from default 

 to 

Q. My system no longer boots from the IDE controller after I installed

a SCSI host adapter. What did I do wrong?

A. Disable the SCSI host adapter BIOS.

Q. 

Why does my system lock up on boot-up after connecting to an ex-

ternal SCSI device?

A. Double check for proper SCSI bus termination and check connections

and cabling.

Q. I added a new SCSI device to one of the Model C SCSI host adapters.

either it is not seen or the system hangs when the host adapter BIOS

tries to scan it. Do I have the proper SCSI bus termination?

A. This problem occurs mainly because the new device is not FAST SCSI

II. You need to change the Enable Fast Transfer option to No in the 

 Configuration Menu. Disable the Enable Synchronous Negoti-

ation option too, if it is not supported by the device.

Configuration for Non-Conforming PCI
Motherboards

One of the objectives of products designed under the Peripheral Compo-

nent Interconnect (PCI) Specification 2.0 is to offer a plug-and-play capabil-

ity-simplified installation, optimized host resources and automatic

resolution of configuration conflicts. Configuration and set-up are per-

formed by the BIOS residing in the host system’s motherboard. 

 adapters are designed to take advantage of this support. However,

while the 

 adapter complies with the 

 2.0 specification, 

 has

encountered numerous 

 motherboards that do 

not 

conform to specifica-

tion, particularly with regard to 

 SCSI host adapter implementation.

The following discusses what to do to configure the 

 adapter when the

motherboard is not fully compliant. Refer to your motherboard system

documentation to determine which of these configuration adaptations is

the correct solution for your particular host system.

The non-conformance problem occurs in how the motherboard BIOS han-

dles interrupt request line (IRQ) assignments. There are inconsistencies

among 

 motherboards in how mapping requirements are met. Most op-

erating systems require an IRQ be assigned to a 

 slot or interrupt PIN

to operate. Where the mother board supports the 

 adapter, its BIOS will

automatically assign the IRQ value for all installed host adapters. Where it

is not, you will need to first define a BIOS address for the host adapter and

then assign 

 In some cases, no means are available to assign 

For operating systems other than DOS, you need to assign the adapter an

IRQ. Currently, 

 BIOS running in the DOS environment does not

require an IRQ and you can successfully use the 

 adapter’s default con-

figuration.

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Questions & Answers

Configuration for Non-Conforming PCI Motherboards 

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