Service manual
DOUBLE-DENSITY
DISK
CONTROLLER
.....11
4
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11
GENERAL DRIVE/CONTROLLER DIAGNOSTIC
The
General Drive/Controller Diagnostic, or TEST, is a diagnostic utility
used
to
test
soft-sectored 5.25-inch diskettes
and
5.25-inch disk drives. TEST verifies
the
drive
rotational speed, drive step rate, read/write mechanism,
and
the
quality of
the
recording
surface of
the
diskette
used
for
the
tests.
You
must
format
the
diskette
which
you
use
to perform
the
TEST diagnostics specifically
for these diagnostics, using
the
TEST F (format disk) option, before you
run
tests.
Furthermore,
the
disk
which
you use to perform the diagnostics
must
not
have
been
used
with
any otherdrive diagnostics. After you
use
the
diskette
to
performTEST tests,
use
an
operating system disk formatting program (CP/M FORMAT or HDOS INIT) before you
actually use
the
diskette for data or program storage.
The
amount of time you need
to
run
the
tests varies
with
the
number
of sides
and
the
density of
the
media
under
test.
It
will take about
two
hours
to
run
all tests using a
single-sided, single-density diskette.
It
will
take about four
and
a
half
hours
to
run
all
tests using a double-sided, double-density diskette.
Initiating the General Drive/Controller Diagnostic
To
run
TEST, boot
up
using
the
Diagnostic
and
Conversion Utilities diskette
and
then
select
menu
option
3.
TEST will explain itself
and
ask
whether
you
want
to
proceed.
If
you
type
YES
and
press
RETURN,
the
program will continue.
If
you
type
NO
and
press RETURN, TEST will
return you to
the
diagnostic programs
main
menu.
If
you have chosen
to
proceed,
the
program will
dismount
the
disks
and
print
the
following message:
REMOVE
THE
DISK(S).
HIT
RETURN
WHEN
READY:
At
this
point, you
should
remove all disks
and
press RETURN.