Service manual

Glossary-7
VTSK VTS Kernel. Part of SunVTS. Controls all testing. Used to probe the hardware
configuration of the system and wait for instructions from the user interface.
VTSUI VTS Open Look User Interface. Part of SunVTS. Allows various user options,
tests, read-log files, and start or stop testing sessions to be selected through the
numerous buttons and windows of OpenWindows.
VTSTALK VTS Script Interface. Part of SunVTS. Allows individual commands to be
transmitted and status messages to be received from vtsk without initiating a
user interface.
VTS_CMD VTS Command. Part of SunVTS. Identical to VTSTALK.
Z-buffer The depth buffer in 3-D graphics. The Z-buffer memory locations, like those in
the frame buffer, correspond to the pixels on the screen. The Z-buffer, however,
contains information relating only to the z-axis (or depth axis). The Z-buffer is
used in hidden surface removal algorithms, so that for each pixel written, the
depth of that pixel is stored in the Z-buffer. When subsequent objects attempt
to draw to that pixel, that object’s z value is compared with the number in the
Z-buffer, and the write is omitted if the object is farther away from the eye.
10BASE-T An evolution of Ethernet technology that succeeded 10BASE5 and 10BASE2 as
the most popular method of physical network implementation. A 10BASE-T
network has a data transfer rate of 10 megabits per second and uses
unshielded twisted-pair wiring with RJ-45 modular telephone plugs and
sockets.
100BASE-T Also known as Fast Ethernet, an Ethernet technology that supports a data
transfer rate of 100 megabits per second over special grades of twisted-pair
wiring. 100BASE-T uses the same protocol as 10BASE-T. There are three
subsets of the 100BASE-T technology: 100BASE-TX defines digital transmission
over two pairs of shielded twisted-pair wire. 100BASE-T4 defines digital
transmission over four pairs of unshielded twisted-pair wire. 100BASE-TX
defines digital transmission over fiber optic cable.