Glossary of Terms
Term |
Definition |
---|---|
Address |
A 12 bit number assigned to a read-only-memory or |
Bit |
The smallest unit of information which can be represented. |
Byte |
A group of 8 contiguous bits occupying a single memory location. |
Character |
A group of 4 contiguous bits of data. |
Instruction |
The smallest single operation that the computer can be |
Object Program |
A program which can be loaded directly into the computer’s |
Program |
A sequence of instructions which are taken as a group to |
Source Program |
A program which is readable by a programmer but which must be |
System Program |
A program written to help in the process of creating user programs. |
User Program |
A program written by the user to make the computer |
nnnb |
nnn represents a number in binary format. |
0xnn |
nnn represents a number in hexadecimal format. |
Note
All numbers in this document are assumed to be decimal unless otherwise specified.
Note
A representation of a byte in memory.
Bits which are fixed are indicated by 0 or 1; bits vvhich may be either
0 or 1 in different circumstances are represented by letters; thus RP represents a
three-bit field which contains one of the eight possible combinations of zeroes and ones.