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IBM System/360 Field Engineering Manual

IBM System/360
131 pages
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7340
HYPERTAPE
DRIVE
(Continued)
Byte
3,
Bits
0-5
-
Reserved
for
diagnostic
information.
Byte
3,
Bit
6 -
Last
Operation
Low
Density
will
be
set
whenever
the
last
operation
affecting
the
tape
drive
included
a Low
Density
modifier.
If
the
last
drive
operation
was
a
Control,
this
bit
will
never
be
present
since
low
density
is
not
specified
for
Control.
If
the
last
drive
operation
was
a
Read
or
Write,
this
bit
will
reflect
the
density
setting
at
which
the
operation
was
performed.
Byte
3,
Bit
7 - IRG
Control
Latch
On
is
set
whenever
a
Write
Continuous
is
programmed
and
remains
on
as
long
as
program
reinstruct
is
possible.
This
bit
is
included
so
that
the
timing
of
the
rein$truct
singleshot
can
be
checked
by
program
means
to
insure
that
it
is
not
too
short,
which
will
shorten
the
pro-
gram
re
instruct
interval,
nor
too
long,
which
exceeds
the
specification
of
the
tape
drive.
108
S/360
IBM
CONFIDENTIAL

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IBM System/360 Specifications

General IconGeneral
BrandIBM
ModelSystem/360
CategoryDesktop
LanguageEnglish

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