Sun Microsystems Ultra 1 140, Руководство по обслуживанию

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Glossary-2 Sun Ultra 1 Series Service Manual—November 1995
DRAM
Dynamic Random Access Memory.
DSIMM
DRAM Single Inline Memory Module. A small printed circuit card that
contains dynamic random access memory (DRAM) chips.
EMI
An acronym for Electrostatic Magnetic Interference.
Ethernet
A type of network hardware that allows communication between systems
connected directly together by transceiver taps, transceiver cables, and either a
coaxial or twisted-pair cables.
Macio
It is an IO chip implementing three master devices on the SBus: the Ethernet,
SCSI and Parallel Port.
NVRAM
An acronym for non-volatile random access memory. The NVRAM is used to
store system variables used by the boot PROM. It also contains the system’s
hostid
number and Ethernet address.
On-Board Diagnostics
A test that allows you to test the control registers, the network controller, the
diskette drive system, memory, the cache, the system clock, and watch the
network for valid packets.
POST
Power-On Self Test. POST runs when you turn on the system power switch or
reboot the system and press and hold the L1-d keys. POST, stored in the boot
PROM, is a series of rudimentary tests designed to verify that the major
components on the system board and including the processor chip set installed
in the system are working properly.
Slavio
It is an IO chip implementing three slaves devices on the SBus: the serial,
keyboard/mouse and floppy.