Motorola MVME177P, Installation And Use Manual

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Functional Description
4
The Ethernet transceiver interface is located on the MVME177P main
board, and the industry-standard DB15 connector is located on the
MVME712 series transition board.
Support functions for the 82596CA LAN coprocessor are provided by the
PCCchip2 ASIC. Refer to the 82596CA user’s guide and to the
Programmer’s Reference Guide for detailed programming information.
SCSI Interface
The MVME177P has 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 SCSI interface is implemented using the NCR 53C710 SCSI I/O
controller.
Support functions for the 53C710 are provided by the PCCchip2 ASIC.
Refer to the NCR 53C710 user’s guide and to the PCCchip2 description in
the 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 MVME177P, sockets are provided for terminators on the
P2 or LCP2 adapter board. If the SCSI bus ends at the adapter board,
termination resistors must be installed on the adapter board. +5V power to
the SCSI bus TERM power line and termination resistors is supplied
through a fuse located on the adapter board.
Local Resources
The MVME177P includes many resources for the local processor. These
include tick timers, software-programmable hardware interrupts, a
watchdog timer, and a local bus timeout.