.TH "bit map" "" "" Definition
.PC
.PP
A
.B "bit map"
is a string of bits in which each bit has a symbolic, rather
than numeric, value.
.SH "See Also"
.Xr bit, bit
.Xr byte, byte
.Xr "Programming COHERENT," programmi
.SH Notes
C permits the manipulation of bits within a byte
through the use of bit-field routines.
These generate code rather than calls to routines.
Bit fields are generally less efficient than
masking because they always generate masking and shifting.
