Glossary-3
MAC
Media access controller.
Mbyte
Megabyte.
MBps
Megabytes per second.
Mbps
Megabits per second.
MCU
Memory controller unit.
MHz
Megahertz.
MII
Media independent interface.
MQFP
Metric quad flat package
ns
Nanosecond.
NVRAM
Non-volatile random access memory. Stores system variables used by the boot
PROM. Contains the system hostID number and Ethernet address.
OpenBoot PROM
A routine that tests the network controller, diskette drive system, memory,
cache, system clock, network monitoring, and control registers.
PCI
Peripheral component interconnect. A high-performance 32- or 64-bit-wide bus
with multiplexed address and data lines.
PCIO
PCI-to-EBus/Ethernet controller. An ASIC that bridges the PCI bus to the
EBus, enabling communication between the PCI bus and all miscellaneous I/O
functions, as well as the connection to slower on-board functions.
PCMCIA
Personal Computer Memory Card International Association.
PID
Process ID.
POR
Power-on reset.
POST
Power-on self-test. A series of tests that verify motherboard components are
operating properly. Initialized at system power-on or when the system is
rebooted.
RAMDAC
RAM digital-to-analog converter. An ASIC responsible for direct interface to
3DRAM. Also provides on-board phase-lock loop (PLL) and clock generator
circuitry for the pixel clock.
RAS
Row address select.
RC
Resistive-capacitive.
RISC
Reset, interrupt, scan, and clock. An ASIC responsible for reset, interrupt, scan,
and clock.
SB
Single buffer.
SDRAM
Synchronous DRAM.
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