AMSTRAD cpc 6128 User Instruction page 457

Hardware
The electronic and mechanical parts of a computer system - anything that isn't
software or firmware.
Hexadecimal (or HEX)
The number system with base 16. Hexadecimal numbers are signified in 6128
programming by the prefix & or &H. e.g. &FF
=
(decimal) 255. (See part 1 of the
chapter entitled 'At your leisure ... .'.)
Hex file
An ASCII representation of a command or machine code file.
High-level language
Languages like BASIC, which are written in 'near litera1' form, where the actual
language does most of the work of interpreting. Slower than machine code
orientated programs, but far simpler to understand.
IEEE-488
One of the standard Interfaces for connecting devices to a microcomputer. Similar
to - but not wholly cOlllpatible with -the Centronics parallel interface.
Information technology
Anything relating to the use of electronics in the processing of information and
communications: wordprocessing, data communications, PRESTEL, etc.
Initialise
Switch on a system, or declare specific values for
variabl~s
before beginning to
execute the body of program - e.g. dimensioning arrays, declaring variables to be
integers, etc.
Input
Anything that enters the computer memory from its keyboard, disc unit, serial
interface or other input source.
Instruction
A request/command to a computer to perform a particular operation. A collection
or sequence of instructions form a program.
Appendix 2 Page 14
Glossary