ZiLOG System 8000 Hardware Reference Manual page 144

HRM
Zilog
HRM
CODE (HEX)
nn06
nn07
0008
0009
OOOA
OnOB
OnOC
OnOE
OnOF
0010
NAME
SKFF
SKFR
WFM
LOAD
UNLD
SEL
MRTRY
STRK
MODE
DIAG
DEFINITION
Controller skips nn files forward (nn=
o
to 255). A file is a group of blocks
followed by a file mark.
Controller skips nn files in reverse
(nn=O to 255).
Controller writes file mark on tape.
Controller moves the tape from the phy-
ical load point to logical load point:
beginning of tape, track 0 selected.
Controller moves the tape to the phy-
sical load point.
Controller selects a new drive: address
is n, a value from 0 to
3.
This sets the maximum number of retries
the controller is allowed for reads and
writes. At power on, the default is 10
retries: n=O to 15.
Controller rewinds the tape and selects
new track: n=O to
3.
Controller changes to mode n (n=0,1).
In mode 1, tape is divided into four
separate tracks. The logical beginning
of tape is at the beginning of each
track. Logical end of tape is at the
end of each track. REWIND moves the
tape to the start of each track; skips
do not carry from track to track.
In mode 0, tape is one long track. Log-
ical beginning of tape is at the start
of track
0
and the logical end of tape
is at the end of track
3.
REWIND moves
the tape to the start of track
0;
skips
carry from track to track.
At power on, the default is mode O.
The controller executes a diagnostic
test, checking the ROM, the FIFO, and
the host interface ports.
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