Read Sharp AR-PB2A (serv.man4) Handy Guide online
RAM
Pronounced “Ram”. The generic term for read/write memory- memory that permits bits and bytes
to be written to it as well as from it. RAM comes in several forms, and manufacturers are
continually coming up with new designs to provide the fastest possible access times at the lowest
possible cost. DRAM, EDO RAM and SRAM are all different versions of RAM that you may
come across.
to be written to it as well as from it. RAM comes in several forms, and manufacturers are
continually coming up with new designs to provide the fastest possible access times at the lowest
possible cost. DRAM, EDO RAM and SRAM are all different versions of RAM that you may
come across.
DRAM
Pronounced “Dee-Ram”. DRAM stores each bit of information in a cell composed of a
capacitor and a transistor. Because the capacitor in a DRAM cell can hold a charge for
only a few milliseconds, DRAM must be continually refreshed in order to retain it’s data.
capacitor and a transistor. Because the capacitor in a DRAM cell can hold a charge for
only a few milliseconds, DRAM must be continually refreshed in order to retain it’s data.
EDO RAM (Extended Data-Out Random Access Memory)
A form of DRAM that speeds access to consecutive locations in memory by first assuming
that the next memory access will target an address in the same transistor row as the previous
one, and second, latching data at the output of the chip so it can be read, even as the inputs
are being changed for the next memory location. EDO RAM reduces memory access time
by an average of about 10%, compared with standard DRAM chips, and costs only a little
more to manufacture. EDO RAM has already replaced DRAM in many computers, and the
trend is expected to continue.
that the next memory access will target an address in the same transistor row as the previous
one, and second, latching data at the output of the chip so it can be read, even as the inputs
are being changed for the next memory location. EDO RAM reduces memory access time
by an average of about 10%, compared with standard DRAM chips, and costs only a little
more to manufacture. EDO RAM has already replaced DRAM in many computers, and the
trend is expected to continue.
SRAM (Static Random Access Memory)
Pronounced “es-ram”. A form of RAM that retains its data without the constant refreshing
that DRAM requires. SRAM is generally preferable to DRAM because it offers faster
memory access times. SRAM however is a lot more expensive and bigger as it contains a
lot more electrical components. The most common use for SRAM is to cache data
travelling between the CPU and a RAM subsystem populated with DRAM. This boosts
performance by reducing the number of DRAM accesses required.
that DRAM requires. SRAM is generally preferable to DRAM because it offers faster
memory access times. SRAM however is a lot more expensive and bigger as it contains a
lot more electrical components. The most common use for SRAM is to cache data
travelling between the CPU and a RAM subsystem populated with DRAM. This boosts
performance by reducing the number of DRAM accesses required.
Remote Printer
A printer that is attached to a network workstation. Under a Novell file server network the network
card within the AR5132 has the capability of acting as if it were a workstation with an attached
remote printer.
card within the AR5132 has the capability of acting as if it were a workstation with an attached
remote printer.
RIP (Raster Image Processor)
A Raster Image Processor is used to convert a page description language into a bitmap image that a
printer is capable of printing. The Printer Board that fits on the AR5132 or AR-280/285/335 has an
printer is capable of printing. The Printer Board that fits on the AR5132 or AR-280/285/335 has an
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