Owner`s manual
Page A-5Roadrunner SCSI Bus Compatibility
A.1.5SCSI Hard Disk Drives
Maxtor LXT, MXT, and 7000 series SCSI disk drives supplied by Alpha Micro are
supported for use on the Roadrunner’s SCSI port. Also, in order to be compatible with
the Roadrunner hardware, your Maxtor MXT SCSI-2 compatible disk drive must have a
sticker indicating it has special 6F+ firmware or it must be using 1.5 or later production
firmware.
Quantum LPS, Empire, Lightning, Trailblazer, and Fireball SCSI disk drives sold by
Alpha Micro are also supported on the Roadrunner’s SCSI port.
Under AMOS 2.2 (or later) operating systems, you can divide your hard disk drive into
logical devices larger than 32MB. In fact, you could take a 540MB drive and make it one
giant 540MB logical. While this is perfectly acceptable, you may get a memory allocation
error when running programs that load a copy of the bitmap into your memory
partition—e.g., DSKANA and MONTST. To use these types of programs, you will need
at least one job on your computer with enough memory allocated to allow you to load
the large bitmap. Depending on the size of the logical device, you may need a memory
partition between 100 and 800KB.
A.2SCSI TERMINATION USING EXTERNAL TERMINATOR OPTION
The preferred method of terminating the SCSI bus in an AMOS based computer is the
installation of an external terminator. In Early April of 1993, the external SCSI bus
terminator became standard on all AMOS based computer configurations. Using an
external terminator makes the task of installing an add-on subsystem (like a portable
CD-ROM drive) easier, eliminating the necessity of removing terminators from a SCSI
device located in the host computer.
External terminators are available from Alpha Micro under part number PRA-00222-00.
To use the external terminator, you need to insure none of your SCSI peripherals inside
the computer are terminated. You will also need to follow the guidelines in the section
on providing termination power for the SCSI bus.
If you have a 10 or 21-slot rack mount VME computer and want to install an external
terminator, you will need to order a special adapter cable, DWB-10200-01. The adapter
cable is required, because there is no external SCSI connector on these computers.
The special cable has a connector that is compatible with the external terminator and
would also allow easy access to your computer for a portable CD-ROM drive or other
SCSI subsystem.
The external terminator is shown in the following illustration:
PDI-03500-50, Rev. B00