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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 is able to. The CPU 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 Speed ratings (MHz)
486DX2 66, 80
486DX2 75, 100, 120
Pentium 90, 100, 120, 133, 166, 200, 233
Pentium MMX 166, 200, 233, 266
Pentium Pro 166, 180, 200
Pentium II 233, 266, 300
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. MCA is architecture used in IBM
Microcomputer.