Service manual

Glossary-4 Sun Ultra 2 Series Service Manual • July 1996
Ethernet A type of network hardware that permits communications between systems
connected directly together by transceiver taps, transceiver cables, and coaxial
or twisted-pair cables.
FBC Frame buffer controller. Provides the interface between the UPA and the frame
buffer RAM (FBRAM). Also controls graphic draw acceleration.
FBRAM Frame buffer RAM. A special type of dynamic RAM (DRAM) used in
high-speed frame buffers. Similar to video RAM, FBRAM is specifically
designed for use in high-speed frame buffers and graphics accelerators.
FEPS Fast Ethernet parallel interface. Provides data throughput for I/O devices
connected to Ethernet, SCSI, and parallel port interfaces.
FFB Fast frame buffer. Circuit card consisting of the FBC, FBRAM, RAMDAC, and
associated circuitry.
Gbyte Gigabyte. One billion bytes.
GUI Graphical user interface. The graphical user interface, or GUI, provides the
user with a method of interacting with the computer and its special
applications, usually via a mouse or other selection device. The GUI usually
includes such things as windows, an intuitive method of manipulating
directories and files, and icons.
I/O Input/output. Refers to equipment used to communicate with a computer, the
data involved in that communication, the media carrying the data, and the
process of communicating that information.
ISO International Organization for Standardization. An international agency that
reviews and approves independently designed products for use within specific
industries. ISO is also responsible for developing standards for information
exchange.
Kbyte Kilobyte. A unit of measure equal to 1024 bytes.
LED Light-emitting diode. A semiconductor diode that radiates light when the
junction is forward biased and there is sufficient current through the diode.
Mbps Megabits-per-second.
Mbyte Megabyte. One million bytes.
MHz Megahertz. One million cycles per second.
MII Media independent interface. A 40-pin miniature-D connector that provides
the electrical interface between some Sun systems and 10BASE-T or 100BASE-T
Ethernet network transceivers.
MMU Memory management unit. The hardware that supports the mapping of virtual
memory addresses to physical addresses.