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Multimac 1260 User Manual Page 51

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remains
to
be
seen.
But
Haba
owners
risk
incompatibility
with
both
Apple's
new
firmware
and
the
disk protection
schemes
of software publishers.
(I
hope
that Haba
will
supply
RAM
based
HFS
software
for
their customers,
'-'"
who
will
need
it)
Q:
Now
that Apple
is
providing a SCSI interface,
will there be other internal
hard
disks (besides
Hyperdrive) marketed?
A:
Yes,
there
are
rumored
to
be
a
few
new
entrants
to
the
market,
which
can
only
drive
down
prices.
One
in
particular
to
watch
for
is
from
Micah.
They
will
be
using
rugged
disks
manufactured
by
Hewlett-Packard (Hyperdrive
has
less expensive Rodime drives,
as
does
the
HD-20).
And
the
software
is
being
written
by
Steve Brecher,
an
extraordinarily talented contributor
to
both
MAUGTM
and
MacTutor
magazine.
Tentative
suggested
retail
prices
vary
from
$1400
for
10
Megabyte
to
$2500
for
30
Meg.
Levco
is
also
interested
in
entering
the
market at
"very
reasonable"
prices since
GCC
won't cooperate
with
them
on
their
memory
upgrade product
If
you
don't
mind
an
external disk,
10
Meg
SCSI
disks
go
for
as
low
as
a
few
hundred dollars
on
other computers.
And
SCSI
disks
meant for engineering workstations
are
available
in
many
capacities, even over
100
Meg
each. I don't
know
if
Apple
is
putting
SCSI
software into
the
ROM,
or whether
you
will
have
to
buy
it
as
a separate
item.
(Just
to
avoid
confusion:
SCSI
is
the
way
the
hardware
is
connected;
HFS
software refers
to
the
way
the
files
are
stored
on
the
disk.)
-.4: What
is
a
good
way to compare the speed of
different hard disks?
A:
I don't
have
a
good
answer,
but
I
can
tell
you
what
not
to
look
for.
Don't compare
data
transfer rates,
and
don't
compare
times
to
launch
an
application or
to
return
to
the
Finder. Data transfer rates
take
only a small part of
the
time
of using a
hard
disk.
You
also
have
to
consider
how
fast
the
read
head
moves
radially
to
different
tracks
(the
seek
time),
and
how
fast
the
motor
spins
the
disk,
among
other factors. Launch
times
can
be
deceptive because a
file
scattered
in
sectors allover
the
disk will
take
longer
to
read
than
one
laying
on
just one track.
This
demon-
stration
is
at
best
random,
and
at
worst,
it
can
be
deliberately skewed
to
make
a product
look
bad.
Disks
can
also
be
made
to
appear faster
by
incorporating "caching"
as
part of
the
driver. Caching
is
a technique
which
uses
a
chunk of
RAM
memory
to
hold
duplicate copies of
recently
accessed
parts of
the
disk.
I haven't
seen
the
January MacWorld, but their
comparison of
the
Apple
HD-20,
I'm
told,
is
at
best
based
on
preliminary
software,
and
at
worst,
totally
off-the-wall.
Q: What's new with the HyperDrive?
A:
As
you
know,
GeC
changed
the
design
a
bit
when
they
started shipping
the
20
Meg
version.
From
what I
see
on
MAUG
(not a scientific sampling),
lots
of people
have
been
having
trouble
with
them.
Not only
have
there
been
...-- hardware failures, but a lot of software
failures
as
well.
Last
month
I mentioned
problems
with
OverVUE
and
ThinkTank.
Business
Filevision
and
RMaker
fail
as
well.
The
root
of
the
problem
is
that GeC
expanded
the
area
of
memory
called
the
"System
Heap"
to
hold
the
Hyper-
Drive's cache, but did not
make
other necessary
changes
to
tell programs what
they
had
done.
Without
thoroughly
testing their
new
software,
they
began
to
distribute
it.
On
the
other
hand,
not
all
of
the
fault
is
with
GCC,
since
some
of these programs shouldn't
have
been
doing
what
they
were
doing,
anyway.
One
workaround
is
to
boot your system
from
a
floppy
disk,
instead of the HyperDrive,
to
get
the
standard
size
of
the
System
Heap.
In
the
case of ThinkTank,
you
can
order version
1.2,
which
is
a non-production
version
that
exists
only
to
fix
the
HyperDrive problem.
Call
Living
Videotext
at
(415)
946-6300. (It
also
allows
ThinkTank
to
work
with
some
RAM
disks.)
Q: Is there another workaround for RMaker?
A:
Andy
H.
(RMaker's
author)
suggest
that
you
set
the
"System
Heap"
attribute
on
the
MDEF
0 resource
in
the
System
file.
Resource Editor
lets
you
do
this
easily,
in
one
of
the
"Info"
dialogs.
Q: Help!
My
Apple Hard Disk
20
is
totally
messed up.
A:
Shift-Option-
Tab
is
a
magic
combination
that
somehow
either reformats or cleans
up
the
HD-20.
I don't
know
precisely
what
it does,
but
I offer
this
as
a clue
to
those
willing
to
experiment. After
they
back
up
their
files.
Twice. Holding
down
Command
and
Option
while
starting
the
Finder also
has
been
reported
to
help
in
clean-
up;
and
you
don't
lose
your
folders
under
HFS.
Q: Will there be a "Flight Simulator" for the
Mac?
A:
Yes,
sub
Logic
is
writing
it,
and
Microsoft
has
bought
the
distribution
rights.
It
was
demonstrated
at
COMDEX.
Q: What happened to MacAdvantage Pascal?
A:
Pecan
Software
Systems,
Inc.,
acquired
the
assets
of
Sof-
Tech
Mircosystems
and
is
now
supporting
MacAdvantage
Pascal.
They
can
be
reached
at
1410
39111
Street,
Brook-
lyn,
NY
11218,
or
at
(718)
851-3100
(800-63-PECAN
for
orders). Current
owners
should
be
getting a
mailing
soon.
Because
they
are
starting
up
and
gung-ho,
they
are
receptive
to
your
ideas about
the
p-System
line
of
products.
Q: How
well
does the new ImageWriter
II
work?
A:
Lofty
Becker
has
been
comparing
the
lmagewriter I
and
II,
and
he
still prefers
the
I. Some of
the
differences
may
be
due
to
the
new
ImageWriter driver, version
2.0,
which
Apple
is
including
on
their
newer
product
disks.
(See
your dealer if
you
want a copy.)
So,
try
both
the
old
and
new
drivers
for
best results. The IW-II
rocks
the
platen
back
and
forth
a
bit
at
the
top
of
the
paper,
tending
to
scrunch
the
top
print
line.
It also doesn't print
line
fonts
(such
as
Geneva)
as
well
at
standard resolution.
(The
bidirectional printing doesn't properly line
up.)
There
have
been
reports that it loses the top-of-form position
in
the
middle
of
long
documents,
and
it
is
more
prone
to
paper jams.
On
the
other
hand,
it
is
both
faster
and
contd.
Washington
Apple
Pi
February
1986
49
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