Glossary-2 SPARCstation 5 Model 110 Service Manual • November 1996
Ecache External cache. Cache that is located external to the microprocessor. See also
cache.
FORTH A high-level programming language. A major feature of FORTH is that user-
defined operators can be used as if they were primitives.
FORTH Toolkit An interactive command interpreter based on the FORTH programming
language. While in the Toolkit, you will see the ok prompt. The Toolkit gives
you access to an extensive set of functions for performing fault isolation and
debugging.
frame buffer board A printed circuit board installed in an SBus slot of the system unit that controls
a video display.
LED Light-emitting diode.
MBus module A printed circuit board installed in an MBus slot of the system unit that
contained the CPU circuitry and components.
Monitor (1) Indicated by the > prompt. From the > prompt, you can boot the system,
continue the execution of a halted program, or enter the FORTH Toolkit.
Monitor (2) A video display unit that is part of the SPARCstation 5 system.
MMU Memory management unit.
NVRAM Nonvolatile ram.
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.
Pok Power ok. A signal from the power supply that is activated after DC voltages
have risen.
POST Power-On Self-Test. The POST runs when you turn on the system power
switch or reboot the system and press and hold the L1-d keys. The POST,
stored in the boot PROM, is a series of rudimentary tests designed to verify
that the major components on the system board are working properly.
PROM Programmable read only memory.
RAM Random access memory.
ROM Read only memory.
SBus card A printed circuit board installed in an SBus slot of the system unit.
SCC Serial communications controller.
SCSI Small computer system interface; pronounced “scuzzy.”
SIA Serial interface adapter.
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