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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 MVME1X2P4 VME Embedded Controller
Programmer's Reference Guide for detailed programming information.
SCSI Interface
The MVME162P4 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 MVME1X2P4 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 MVME162P4, 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 MVME162P4 includes many resources for the local processor. These
include tick timers, software-programmable hardware interrupts, a
watchdog timer, and a local bus timeout.
Programmable Tick Timers
Six 32-bit programmable tick timers with 1µs resolution are available: two
in the VMEchip2 ASIC and four in the Petra/MC2 chip. The tick timers
may be programmed to generate periodic interrupts to the processor. Refer
http://www.motorola.com/computer/literature
Functional Description
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