TYAN THUNDER I7522 Manual page 53

Thunder i7520 / Thunder i75 20 R Appendix I: Glossary
operating systems. It will provide for systems, which are easier to design, with cables that are
simpler to route and install, smaller cable connectors, and lower voltage requirements.
SDRAM (Synchronous Dynamic RAM): called as such because it can keep two sets of
memory addresses open simultaneously. By transferring data alternately from one set of
addresses and then the other, SDRAM cuts down on the delays associated wi th non-
synchronous RAM, which must close one address bank before opening the next.
Serial port: called as such because it transmits the eight bits of a byte of data along one wire,
and receives data on another single wire (that is, the data is transmitted in serial form, one bit
after another).
SCSI Interrupt Steering Logic (SISL): Architecture that allows a RAID controller, such as
AcceleRAID 150, 200 or 250, to implement RAID on a system board-embedded SCSI bus or a
set of SCSI busses. SISL: SCSI Inter rupt Steering Logic ( LSI ) (only on LSI SCSI boards)
SIMM (Single In-line Memory Module): formally the most common form of RAM for
motherboards. They must be installed in pairs, and do not have the carrying capacity or the
speed of DIMM modules.
Sleep/Suspend mode: in this mode, all devices except the CPU shut down.
SRAM (Static RAM): unlike DRAM, this type of RAM does not need to be refreshed in order
to prevent data loss. Thus, it is faster and more expensive.
SSI (Server System Infrastructure): an industry initiative intended to provide ready -t o-u s e
design specifications for common server hardware elements (chassis, power supplies, and
racks) to promote and support server industry growth.
Standby mode: in this mode, the video and hard drives shut down; all other devices continue
to operate normally.
Striping: see RAID
UltraDMA- 33/66/100: a fast version of the old DMA channel. UltraDMA is also called
UltraATA. Without proper UltraDMA controller, your system cannot take advantage of higher
data tran sfer rates of the new UltraDMA/UltraATA hard drives.
USB (Universal Serial Bus): a versatile port. This one port type can function as a serial,
parallel, mouse, keyboard or joystick port. It is fast enough to support video transfer, and is
capable of supp orting up to 127 daisy-chained peripheral devices.
VGA (Video Graphics Array): the PC video display standard
V-SYNC: controls the vertical scanning properties of the monitor.
ZCR: Zero Channel RAID. PCI card that allows a RAID card to use the onboard SCSI chip,
thus lowering cost of RAID solution
ZIF Socket (Zero Insertion Force socket): these sockets make it possible to insert CPUs
without damaging the sensitive CPU pins. The CPU is lightly placed in an open ZIF socket,
and a lever is pulled down. This shift the processor over and down, guiding into the board and
locking it into place.
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