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EISA, VL-Bus, PCI and SCSI are examples of PC buses.
Bus Mastering – A method of transferring data through a bus in which the device takes over the
bus and directly controls the transfer of data to the computer's memory. Bus mastering is a method
of Direct Memory Access ( DMA ) transfer.
Cache – Cache RAM is an extra holding area for program instructions that need to be
frequently used by the CPU or swapped in and out of RAM. Your CPU can usually
access those instructions from the cache more quickly than it could from a hard disk or
even RAM, so a cache helps the system work more efficiently. Most systems sold
today offer either 256K or 512K cache.
CPU (Central Processing Unit) – executes all commands and controls the flow of
data, providing the " brain " that enables the PC to calculate and perform the
operations like sorting information more quickly than a human could.
makes perhaps the greatest contribution to a PC's speed and power. Note: Any
additional information is subject to change without prior revision from the supplier.
Table 1 -- CPU Speeds
Processor type
486DX2
486DX4
Pentium
Pentium MMX
Pentium Pro
Pentium II
EIDE (Enhanced IDE) – It is a hard drive controller that enables your system to be able
to handle fast hard disk drives at a speed of 10Mbps.
EISA or MCA Bus – Data is transmitted along 32 data lines to adapter cards designed
specifically to work with the 32-bit buses. MCA expansion slots cannot accept 8-bit or
16-bit adapter cards. EISA stands for Extended Industry Standard Architecture, while
MCA stands for MicroChannel Architecture.
Microcomputer.
Speed ratings (MHz)
66, 80
75, 100, 120
90, 100, 120, 133, 166, 200
166, 200, 233
166, 180, 200
233, 266, 300, 333
MCA is architecture used in IBM
AP-545V/55
The CPU
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