61 lines
2.3 KiB
Plaintext
61 lines
2.3 KiB
Plaintext
|
A Glossary for 386
|
|||
|
|
|
|||
|
|
|
|||
|
|
BUS SPEED: Modems, disk drives and facsimile boards connected to
|
|||
|
|
a bus generally operate at 10 MHz or less. In contrast, an 80386
|
|||
|
|
CPU's clock speed goes as high as 33 MHz.
|
|||
|
|
|
|||
|
|
CACHE: Dedicated memory area that buffers data or instructions
|
|||
|
|
ready for use.
|
|||
|
|
|
|||
|
|
CACHING CONTROLLER: Massive buffer with up to several megabytes
|
|||
|
|
of dedicated RAM to improve hard-disk access time.
|
|||
|
|
|
|||
|
|
DIP: Dual in-line package, the traditional bug-like integrated
|
|||
|
|
circuit chip.
|
|||
|
|
|
|||
|
|
DRAM: Dynamic random-access memory chip.
|
|||
|
|
|
|||
|
|
FCC RATING: Measure of radio-frequency interference from circuitry
|
|||
|
|
signals. Class A is for office computers. Class B indicates a
|
|||
|
|
better-shielded machine for use near radios and televisions.
|
|||
|
|
|
|||
|
|
INTERLEAVED MEMORY: Identical data in two different memory banks.
|
|||
|
|
One always remains available while the other is being refreshed.
|
|||
|
|
|
|||
|
|
MEMORY CACHE: Portion of memory set aside and not subtracted from
|
|||
|
|
the 640K that holds the next instructions or data for the CPU;
|
|||
|
|
controlled by dedicated chip or software.
|
|||
|
|
|
|||
|
|
PROTECTED MODE, 286: 16-bit operating mode that assists
|
|||
|
|
multitasking and consumes up to 16M RAM. An 80286 computer in
|
|||
|
|
protected mode can run only one MS-DOS program under OS/2.
|
|||
|
|
|
|||
|
|
PROTECTED MODE, 386: A 386 chip can address up to four gigabytes
|
|||
|
|
of memory by switching into 32-bit internal operation. Few
|
|||
|
|
applications need more than 16M.
|
|||
|
|
|
|||
|
|
REAL 8086 MODE: Start-up operating mode of 8086/88, 286 and 386
|
|||
|
|
computers.
|
|||
|
|
|
|||
|
|
RFI: Radio-frequency interference emitted by a poorly shielded
|
|||
|
|
computer or external device such as a hard disk.
|
|||
|
|
|
|||
|
|
SHADOW RAM: Software that loads the 16-bit system or video BIOS
|
|||
|
|
from a chip on the motherboard into faster 32-bit RAM upon
|
|||
|
|
power-up.
|
|||
|
|
|
|||
|
|
SIMM: Single in-line memory module carrying many memory chips.
|
|||
|
|
|
|||
|
|
SIP: Single in-line package. Integrated circuit chip with all
|
|||
|
|
leads coming off one side.
|
|||
|
|
|
|||
|
|
SRAM: Static random-access memory chip. Faster and costlier than
|
|||
|
|
DRAM.
|
|||
|
|
|
|||
|
|
TEMPEST: The ultimate RFI rating. A Tempest computer radiates no
|
|||
|
|
electro-magnetic signals that might be intercepted remotely.
|
|||
|
|
|
|||
|
|
VIRTUAL 8086 OPERATION: An 80386 chip can set aside memory to run
|
|||
|
|
programs on a simple, 8086-like virtual computer. That is how 386
|
|||
|
|
UNIX operating systems run PC-compatible programs.
|