Sun Microsystems SPARCstation 4 110 Service Manual page 172

FORTH
FORTH Toolkit
frame buffer board
I/O
LED
MBus module
Monitor (1)
Monitor (2)
MMU
NVRAM
On-Board
Diagnostics
Pok
POST
PROM
RAM
ROM
SBus card
SCC
SCSI
Glossary-2 SPARCstation 4 Model 110 Service Manual • July 1996
A high-level programming language. A major feature of FORTH is that user-
defined operators can be used as if they were primitives.
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.
A printed circuit board installed in an SBus slot of the system unit that controls
a video display.
Input/output. A device that inputs data to a computer CPU and receives data
from a computer CPU. Examples of I/O devices include keyboards, mice,
monitors, and peripherals devices.
Light-emitting diode.
A printed circuit board installed in an MBus slot of the system unit that
contains the CPU circuitry and components.
Indicated by the > prompt. From the > prompt, you can boot the system,
continue the execution of a halted program, or enter the FORTH Toolkit.
A video display unit that is part of the SPARCstation 4 system. It is not
synonymous with terminal.
Memory management unit.
Nonvolatile RAM.
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.
Power ok. A signal from the power supply that is activated after DC voltages
have risen.
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.
Programmable read only memory.
Random access memory.
Read only memory.
A printed circuit board installed in an SBus slot of the system unit.
Serial communications controller.
Small computer system interface; pronounced "scuzzy."