2 Sep
1997
2 Sep
'97
9:46 a.m.
What is the difference between an AppleDisk 5.25 and an Apple DuoDisk
5.25?
Which work on the IIe and which on the IIgs?
Does a IIgs 3.5" drive work on the IIe?
thanks
Kai
2 Sep
2 Sep
10:41 a.m.
On Tue, 2 Sep 1997, Kai Kaltenbach wrote:
What is the difference between an AppleDisk 5.25 and
an Apple DuoDisk
5.25?
Nothing. The mechanical assembly is the same exact thing. What you are
referring to as the "AppleDisk" is the UniDisk (and later rather
unimaginatively called the Apple 5.25" Drive). It's the same disk drive
in a different housing.
Which work on the IIe and which on the IIgs?
Both work on both. As long as you have a 5.25 controller with the DB
type connector (as opposed to the Disk ][ Controller with the square
connector and ribbon cable) it will work in either.
Does a IIgs 3.5" drive work on the IIe?
Not sure as I never owned a GS. Someone else should chime in at this point.
But I think the answer is yes as long as you have an Apple 3.5" Disk
Controller, which aren't terribly common.
Sam
-------------------------------------------------------------------------------
Computer Historian, Programmer, Musician, Philosopher, Athlete, Writer, Jackass
noon
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2:24 p.m.
Does a IIgs
3.5" drive work on the IIe?
I believe the IIe needs a Apple Superdrive controller to run the high-density
3.5" drive. These are supposed to be hard to find, but if you ask around
"comp.sys.apple2.marketplace" you can probably find one.
When you get it, I believe that you'll need ProDOS to make it work.
DOS 3.3 would require some very heavy-handed hacking to make it talk to
the Superdrive. 
1:05 p.m.
> Does a
IIgs 3.5" drive work on the IIe?
The Standard 3.5" drives for the Apple IIgs are Double Density, there are
the HighDensity drives, but they are spendy!
Not sure if the IIe will handle them or not, if it does it will probably
require a later version of ProDOS, which in turn will require an enhanced
IIe (yes, that is a bit redundant, but none the less). The Enhanced IIe's
seem to be a lot less common than the plain IIe's (I've 3 IIe's and no
enhanced ones). IIRC an interesting bit on the DuoDisk drives is
it's the only way to get
two 5.25" drives on the IIgs. However there is a downside to the DuoDisk
you need the drive cable which since it's detachable doesn't always come
with the drive (that's how I got my second IIe, I bought it for the cable,
as it was cheaper than buying the cable).
Not true. The //gs can drive two of the Apple 5.25" Drives daisy chained
together. The passthrough conenctor takes care of remapping the drive
select line.
<<<John>>>
2:34 p.m.
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4:05 p.m.
But they aren't exactly rare. At one point,
Computer Warehouse here
in Vancouver had several hundred enhanced IIe's, apparently bought
from a local school system. They also had the most enormous wall of
I wouldn't be surprised if a large number were still in schools, I've no
idea what the state of modernization is in schools though. Still the IIe
was sold until 1992 I believe, which means some are still fairly new.
IIgs's that I'd ever seen; you could've
built an entire house with 'em
if you stacked them like bricks! About 1/5th were "Woz special
editions" (not all that rare or special...)
I think I've heard numbers like 100,000 on the "Special Edition", I think
the ROM 3's might be rarer. Personally I've never seen either.
You can still buy Enhanced IIe logic boards from Sun
Remarketing.
A while back they were selling new, in-the-box, enhanced IIe's, as well.
Yeh, but I don't make enough to feel I can deal with them, besides with a
pair of IIgs's the Enhanced IIe would be a nice to have is all. Actually
I'll probably get one of the enhancement kits and enhance one of them I've
got myself. The kits are only $29 from a place called Alltech Electronics
in California. http://www.allelec.com/appleii.htm They seem to be the
outfit to deal with for upgrades and such. From what I saw on their web
page it looks like if you've got the 19-pin controller card for the IIe you
can probably drive a 3.5" floppy, I'd give it a try but all my IIe's are in
storage, I've only got the one IIgs here.
They also have some fun IIgs upgrades; SCSI, cpu accelerators, and 8Mb RAM
boards. I've got the SCSI, and want to get the other two.
However there
is a downside to the DuoDisk
you need the drive cable which since it's detachable doesn't always come
with the drive (that's how I got my second IIe, I bought it for the cable,
as it was cheaper than buying the cable).
Where can an ordinary Joe like me buy 19-pin D connectors? Weren't there
also 23-pin D's used on Amigas? 
5:52 p.m.
New subject: Burroughs Update
Here are a *few* titles of the Burroughs manuals I have. These were just in
the first box or so and are just posted to give an idea of the type of stuff
in these manuals.
B6900 Reference Manual, July 1981
A Series System Software Support Reference Manual, Dec 1985
A Series System Software Utilities Reference Manual, Dec 1985
A Series Master Index, May 1986
A Series Cobol, Dec 1985
B 1700 Cobol Compiler Documentation, Dec 1973
B 1000 Systems Fortran 77, Jan 1984
B 1000 Systems Netwrok Controller Installation Guide, Oct 1986
B 1000 Software Operation Guide (Vol 1), Sep 1983
B 1000 System Software Release,
Data Management System II, 1984
B1800/B1700 MCP Control Systax, Rev A, 2/23/1978
Software Development Language (SDL) Manual, June 1972
B1800/B1700 SDL, Rev F, 6/25/1980
B1700/B1800 Data Communications Subsystems,
Information Manual, Dec 1975
Product Specification, April 7, 1977
Glossary of Data Communication Terms, June 1978
There are at least another 300 and probably more including more system
manuals, Design Reviews, software problem reports and fixes, Cande, Cobol,
Fortran, Instructional Materials, etc. Oh, apparently there were a pile of
tapes that made it to the dump <sigh> but I have three 8" tapes that were
left. I didn't pick up the punched cards yet and there is still another
room that was being cleaned out that looked like it might have had some
manuals in it. I have email from a few people who have told me a bit of
what they want, but how do we handle this stuff now?.
3 Sep
3 Sep
3:32 p.m.
New subject: Unibus thingies
Somewhat recently I purchased a set of cards out of a PDP-11/45. It all
seems to be there, but I have two different "Internal Bus Connectors", an
M920 and an M9200. Which is correct?
I have seen many of the M920s, but the M9200s are a bit new to me (or
maybe I have not looked very hard!)
Incidently, the M9200 has an interesting "dec unibus" sticker on the handle.
William Donzelli
william(a)ans.net
4 Sep
4 Sep
9:34 a.m.
New subject: Unibus thingies
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