5 Sep
2022
5 Sep
'22
11:07 a.m.
> Are you
sure about that? The 5100 doesn't support floppy drives. And
I've
> never heard of third-party drives (that would
need IMFs, too) for the
5100.
$3100 is about what IBM charged for a fully loaded 5150. (PC)
THAT is not a 5100! $3100 for a 5100 would have been a bargain.
We are neither talking about the 5150, nor about $3100 but $31,000 for a
5100 (see above). Or did I miss something?
5 Sep
5 Sep
11:49 a.m.
New subject: You have Apple Lisa 1 "twiggy" system to trade for my IBM 5100 Portable PC?
It continues to blow my mind that the Apple Lisa is worth anything. They
used to be sold for almost nothing as Mac XL's, and tended to be
temperamental.
So when will the Apple Newton or Mac Plus be worth anything? :-)
C
12:27 p.m.
New subject: You have Apple Lisa 1 "twiggy" system to trade for my IBM 5100 Portable PC?
The Lisa is the first consumer grade GUI computer to come to market. The
Xerox 8010 with the Star operating system preceded it by a couple years,
but that was a high-end $50,000 (in 1981 dollars) workstation with big
businesses as the target market. So it has some historical significance in
that regard.
Sellam
On Mon, Sep 5, 2022 at 11:50 AM Chris Zach via cctalk <cctalk(a)classiccmp.org>
wrote:
It continues to blow my mind that the Apple Lisa is
worth anything. They
used to be sold for almost nothing as Mac XL's, and tended to be
temperamental.
So when will the Apple Newton or Mac Plus be worth anything? :-)
C
12:49 p.m.
New subject: You have Apple Lisa 1 "twiggy" system to trade for my IBM 5100 Portable PC?
I played briefly with a pre-release Lisa (Berkeley Smalltalk). But then
didn't see them again. I almost bought one later as a cheaper substitute
for a Mac!
It is historically significant.
So is the 5100.
But, they are totally different categories. It's like when I traded a
Honda for a Leica.
Haven't heard from you for a while!
--
Grumpy Ol' Fred cisin(a)xenosoft.com
On Mon, 5 Sep 2022, Sellam Abraham via cctalk wrote:
The Lisa is the first consumer grade GUI computer to
come to market. The
Xerox 8010 with the Star operating system preceded it by a couple years,
but that was a high-end $50,000 (in 1981 dollars) workstation with big
businesses as the target market. So it has some historical significance in
that regard.
Sellam
On Mon, Sep 5, 2022 at 11:50 AM Chris Zach via cctalk <cctalk(a)classiccmp.org>
wrote:
> It continues to blow my mind that the Apple Lisa is worth anything. They
> used to be sold for almost nothing as Mac XL's, and tended to be
> temperamental.
>
> So when will the Apple Newton or Mac Plus be worth anything? :-)
>
> C
>
12:56 p.m.
New subject: You have Apple Lisa 1 "twiggy" system to trade for my IBM 5100 Portable PC?
On Mon, Sep 5, 2022 at 12:49 PM Fred Cisin via cctalk <cctalk(a)classiccmp.org>
wrote:
Haven't heard from you for a while!
Yep, and I missed you at the VCF this year. I decided to re-join this list
when I happened upon it through a web search. The traffic is considerably
less than it used to be so it's a tolerable distraction.
It's good to see you're still around. I hope you are well.
Sellam
4:43 p.m.
New subject: You have Apple Lisa 1 "twiggy" system to trade for my IBM 5100 Portable PC?
The Lisa is the first consumer grade GUI computer to
come to market. The
Xerox 8010 with the Star operating system preceded it by a couple years,
but that was a high-end $50,000 (in 1981 dollars) workstation with big
businesses as the target market. So it has some historical significance in
that regard.
Ok, a Lisa 1 perhaps. Very few of those drives survived (for good
reason, they were terrible) and most were upconverted to Lisa 2's.
I still have a Lisa Prodrive around here somewhere.....
CZ
4:49 p.m.
New subject: You have Apple Lisa 1 "twiggy" system to trade for my IBM 5100 Portable PC?
On 9/5/22 11:07, Tom Stepleton via cctalk wrote:
There was a third-party floppy drive for the IBM 5100 :-)
Or at least there as something that was sold in this way. Here is its
brochure:
http://www.bitsavers.org/pdf/sykes/brochures/Sykes_Comm-Stor_5100_Brochure.…
Note that it "plugs directly into the Serial I/O Adapter of the IBM 5100
with no hardware or software changes". So it's a serial-port connected
floppy drive that talks to the 5100 in a format that it likes.
(What is an IMF?)
--Tom The unit I have is IBM.
It only did single sided diskettes, low density. It's the only device
which I've ever had which could write deleted sectors. The formatting
on the diskette is very similar to the tape formatting with two EOT
records followed by the remainder of track 0 padded out with deleted
sectors.
My Tarbell controller would read the two records and returned errors for
the remaining sectors. That's how I discovered that deleted sectors
existed.
Sykes made much more robust devices, and I'm not familiar with the unit
for the 5100. But I'd not be surprised if it wrote and read many more
formats.
Thanks
Jim
thanks
jim
> Are you sure about that? The 5100 doesn't
support floppy drives. And
I've
> never heard of third-party drives (that would
need IMFs, too) for the
5100.
$3100 is about what IBM charged for a fully
loaded 5150. (PC)
THAT is not a 5100! $3100 for a 5100 would have been a bargain.
We are neither
talking about the 5150, nor about $3100 but $31,000 for a
5100 (see above). Or did I miss something?
6 Sep
6 Sep
12:41 a.m.
New subject: You have Apple Lisa 1 "twiggy" system to trade for my IBM 5100 Portable PC?
On Mon, 5 Sep 2022, Tom Stepleton wrote:
Or at least there as something that was sold in this
way. Here is its
brochure:
http://www.bitsavers.org/pdf/sykes/brochures/Sykes_Comm-Stor_5100_Brochure.…
Interesting!
(What is an IMF?)
IMF = internal machine fix
The 5100/5110 had a mechanism to load resident binary routines into memory
in order to patch ROS (=ROM) routines or to add a driver (e.g. the
Plot feature). Basically, you load a program that then relocates the
resident part to the end of free memory, patches some entry points in RWS
(=RAM) and adjusts the end-of-memory value.
Christian
12:51 a.m.
New subject: You have Apple Lisa 1 "twiggy" system to trade for my IBM 5100 Portable PC?
On Mon, 5 Sep 2022, jim stephens wrote:
The unit I have is IBM.
There was no floppy drive unit from IBM for the IBM 5100.
Or do you have a model number?
It only did single sided diskettes, low density.
It's the only device which
The IBM 5114 handles single and double sided diskettes, as well as FM and
MFM, so up to over 1 MB per floppy.
I've ever had which could write deleted sectors.
The formatting on the
diskette is very similar to the tape formatting with two EOT records followed
by the remainder of track 0 padded out with deleted sectors.
??
Now I'm curious. What floppy drive system exactly are you talking about?
Christian
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days inactive
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days old
8 comments
6 participants
participants (6)
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Chris Zach -
Christian Corti -
Fred Cisin -
jim stephens -
Sellam Abraham -
Tom Stepleton