Sun Microsystems Ultra 1 Creator Series Service Manual page 211

SIMM Single in-line memory module.
Slavio Slave I/O. An ASIC responsible for implementing three slave interfaces on the
SBus: serial, keyboard/mouse, and diskette drive.
SunVTS Sun validation and test suite. A diagnostic application designed to test
hardware.
SYSIO System I/O. An ASIC responsible for bridging data transfers between the UPA
and the SBus. Acts as an I/O hub, providing IOMMU and streaming buffers to
accelerate sequential I/O access.
TPE Twisted-pair Ethernet.
TOD Time of day. A timekeeping IC.
TTL Transistor-transistor logic.
UPA UltraSPARC port architecture. Provides processor-to-memory interconnection.
UPA AB 0 UPA address bus 0. Provides data interface between the UltraSPARC processor
and the SYSIO ASIC.
UPA AB 1 UPA address bus 1. Supports slave UPA connection to the expansion slot for
graphics capability.
VIS Visual instruction set.
vtsk VTS kernel. A SunVTS diagnostic tool that control all testing; operates in
OpenWindows.
vtsui VTS user interface. A SunVTS diagnostic tool that provides vtsk control,
various user options, tests, and read-log files.
vtstty VTS teletype. A SunVTS diagnostic tool that controls the vtsk from either
a command shell or a terminal attached to a serial port.
Glossary-3