NEC D2246 Maintenance Manual page 157

Table C-5 Seek Modes (cont'd)
DESCRIPTION
Seek Seeks one cylinder at a time from the low
cylinder (CLI) to the high cylinder (CL2), and
then returns directly to the low cylinder to
repeat the cycle. For example, with CLI equal
to 000 and CL2 equal to 100, seeks to 001, to
002, to ... , to 100. Returns to CLI and repeats.
5
Decrement Seek Seeks one cylinder at a time from the high
cylinder (CL2) to the low cylinder (CL 1), and
then returns directly to the high cylinder to
repeat the cycle. For example, with CLI equal
to 000 and CL2 equal to 100, seeks to 099, to
098, to ... , to 000. Returns to CL2 and repeats.
6 X
+
N (INC) Seeks incrementally from the low cylinder
(CLI) to the high cylinder (CL2), and then
returns directly to CLI to repeat the cycle. For
example, with CLI equal to 000 and CL2 equal
to 100, seeks to 001 and returns to CLI; seeks
to 002 and returns to CL 1; seeks to ... and
returns to CLI; seeks to 100. Returns to CLI
and repeats cycle.
7 X - N (DEC) Seeks decrementally from the high cylinder
(CL2) to the low cylinder (CL 1), and then
returns directly to CL2 to repeat the cycle. For
example, with CLI equal to 000 and CL2 equal
to 100, seeks to 099 and returns to CL2; seeks
to 098 and returns to CL2; seeks to ... and
returns to CL2; seeks to 000. Returns to CL2
and repeats cycle.
8
Random
Seeks randomly within the parameters set by
the low and high cylinder addresses.
9 Repeat and RTZ Seeks to high cylinder (CL2), returns to cylinder
000, and repeats cycle.
C-14