Pixel: Computer term for picture element. Each dot on the screen
that makes up an image is called a pixel. Each character on
the screen is displayed within an 8 X 8 grid of pixels. The
entire screen is composed of a 320 X 200 pixel grid, ln bit
map mode, each pixel corresponds to one bit in the
computer’s memory.
Polling: A communications control method used by some
computer/terminal systems whereby a “master" station asks
many devices attached to a common transmission medium, in
turn, whether they have information to send.
Pointer: A register used to indicate the address of a location in
memory.
Port: A channel through which data is transferred to and from the
CPU. An 8-bit CPU can address 256 ports.
Printer: Peripheral device that outputs onto a sheet of paper. This
paper is referred to as a hard copy.
Program: A series of instructions that direct the computer to
perform a specific task. Programs can be stored on diskette
or cassette, reside in the computer’s memory, or be listed on
a printer.
Programmable: Capable of being processed with computer
instructions.
Program Line: A statement or series of statements preceded by a
line number in a program. The maximum length of a program
line on the Commodore 128 is 160 characters.
PROM: Acronym for Programmable Read Only Memory. A
semiconductor memory whose contents cannot be changed.
Protocol: The rules under which computers exchange information,
including the organization of the units of data to be
transferred.
Random Access Memory (RAM): The programmable area of the
computer’s memory that can be read from and written to
GL-11
To Next Page
Loading...
