Motorola MVME2400 - Manual (Page 164)

Glossary
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RAM Random-Access Memory. The temporary memory that a computer
uses to hold the instructions and data currently being worked with.
All data in RAM is lost when the computer is turned off.
RAS Row Address Strobe. A clock signal used in dynamic RAMs to
control the input of the row addresses.
Raven The PowerPC-to-PCI local bus bridge chip developed by Motorola
for the MVME2600 and MVME3600 series of boards. It provides
the necessary interface between the PowerPC 60x bus and the PCI
bus, and acts as interrupt controller.
Reduced-Instruction-Set Computer (RISC)
A computer in which the processor’s instruction set is limited to
constant-length instructions that can usually be executed in a single
clock cycle.
RFI Radio Frequency Interference
RGB The three separate color signals: Red, Green, and Blue. Used with
color displays, an interface that uses these three color signals as
opposed to an interface used with a monochrome display that
requires only a single signal. Both digital and analog RGB interfaces
exist.
RISC See Reduced Instruction Set Computer (RISC).
ROM Read-Only Memory
RTC Real-Time Clock
SBC Single Board Computer
SCSI Small Computer Systems Interface. An industry-standard high-
speed interface primarily used for secondary storage. SCSI-1
provides up to 5 Mbps data transfer.
SCSI-2 (Fast/Wide) An improvement over plain SCSI; and includes command queuing.
Fast SCSI provides 10 Mbps data transfer on an 8-bit bus. Wide
SCSI provides up to 40 Mbps data transfer on a 16- or 32-bit bus.
serial port A connector that can exchange data with an I/O device one bit at a
time. It may operate synchronously or asynchronously, and may
include start bits, stop bits, and/or parity.
SIM Serial Interface Module