Motorola MVME162P-242, Installation And Use Manual

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Functional Description
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Support functions for the 82596CA LAN coprocessor are provided by the
Petra MC2 sector. Refer to the 82596CA user’s guide and to the description
of the MC2 function in the MVME1X2P2 VME Embedded Controller
Programmer’s Reference Guide for detailed programming information.
SCSI Interface
The MVME162P2 may have provision for mass storage subsystems
through the industry-standard SCSI bus. These subsystems may include
hard and floppy disk drives, streaming tape drives, and other mass storage
devices. The optional SCSI interface is implemented using the NCR
53C710 SCSI I/O controller.
Support functions for the 53C710 are provided by the Petra MC2 sector.
Refer to the NCR 53C710 user’s guide and to the description of the MC2
function in the MVME1X2P2 VME Embedded Controller Programmer’s
Reference Guide for detailed programming information.
SCSI Termination
It is important that the SCSI bus be properly terminated at both ends.
In the case of the MVME162P2, terminators for the SCSI bus are present
on the main board. The SCSI terminators are enabled or disabled by a
jumper on header J12. If the SCSI bus ends at the MVME162P2, a jumper
must be installed at J12.
The
FUSES
LED on the MVME162P2 front panel mo5V power to
the SCSI bus TERM power line in addition to LAN power and
IndustryPack power; the
FUSES
LED illuminates when all fuses on the
MVME162P2 are operational. (The fuses are solid-state circuit breakers
that reset when the short which trips them is removed.) Because any device
on the SCSI bus can provide power to the TERM power line, the
FUSES
LED does not directly indicate the condition of the fuse.
Local Resources
The MVME162P2 includes many resources for the local processor. These
include tick timers, software-programmable hardware interrupts, a
watchdog timer, and a local bus timeout.