Specifications

46 CHAPTER 4
THE ULTRA WIDE SCSI CONTROLLER
CONNECTING AND OPERATING INTERNAL AND
EXTERNAL SCSI DEVICES
The CYBERSTORM PPC has an internal non-terminated 68pin female high density SCSI
connector following the ULTRA WIDE SCSI standard. All kinds of internal and external SCSI
devices can be connected through this SCSI connector. It is important to take care that the
SCSI bus is correctly terminated, as it is explained in the paragraphs and examples below,
and that the SCSI ID of the devices is correctly set, as it is also explained in the following
paragraphs. The SCSI cables and adaptors which are needed to connect different types of
SCSI devices can be obtained at your local dealer; we recommend to ask the dealer where
you have bought your CYBERSTORM PPC for the cabels and adaptors you may need.
Internal ULTRA WIDE SCSI devices will be connected by use of a 68pin flat ribbon cable. If
you want to connect FAST SCSI devices to the CYBERSTORM PPC, you will need an
adaptor to bridge from the ULTRA WIDE SCSI bus to the FAST SCSI bus. This adaptor must
have an active termination of the eight upper data lines of the ULTRA WIDE SCSI bus;
please make absolutely sure that you choose the right type of adaptor.
For the connection of external SCSI devices you will need an adaptor for connecting these
devices, which are available in several different forms. When you choose the adaptor that fits
your needs make sure that you choose the right external connector type (depending on
whether you want to connect ULTRA WIDE SCSI devices or FAST SCSI devices), and that
the adaptor - in case it is the bridge from ULTRA WIDE SCSI to FAST SCSI - includes an
active termination of the eight upper data lines of the ULTRA WIDE SCSI bus.
During the operation of external SCSI devices it should be taken care that the external
devices are always switched on before the computer is switched on, and that they are always
switched off after the computer has been switched off.
Figure 7.
CYBERSTORM PPC
Ultra-Wide-SCSI
Controller
active active
terminated terminated
SCSI device or SCSI device or
terminator SCSI- SCSI- terminator
device 1 device 2
ADVICE
For the connection of external SCSI units only top quality screened cables are
admitted, which comply with the valid standards (CE, FCC, or similar). For
purchasing such cables, which offer the corresponding attenuation properties,
please turn to your retailer. Please also be aware that external SCSI units have
to fulfill the valid standard norms!
PowerUP - Amiga Goes PowerPC
http://powerup.amigaworld.de