NEC CP/M-86 - Page 13

CPIM-86 System Overview
Table 1-1 CP/M-86 Terms
TERM
MEANING
Nibble
4-bit half-byte
Byte
8-bit value
Word
16-bit value
Double Word
32-bit value
Paragraph
16 contiguous bytes
Paragraph Boundary
An address evenly divisible by 16 (low
order nibble 0)
Segment
Up to 64K contiguous bytes
Segment Register
One of CS, OS, ES, or SS
Offset
16-bit displacement from a segment reg-
ister
Group
A segment-register-rela tive reloca table
program unit
Address
The effective memory address derived
from the combination of a segment reg-
ister value plus an offset value
1-3