17 Mar
2022
17 Mar
'22
9:26 a.m.
Does anyone have or know whether the schematics for the IBM 5110 or 5100 are available?
And the tightly related question of whether anyone has done ROM (ROS) dumps?
There are some service manuals on bitsavers, they are field-service board-level manuals,
mostly step-by-step problem resolution guides, no schematics.
As a system, it's small enough to be reverse-engineered, in that regard it's
tractable. However, it's implemented using IBM's mid-70s PCB and IC technology,
increasing an RE effort by a couple orders of magnitude if not approaching impossible,
unless one were to develop some robotic probing system and software.
There was a 5110 on ebay, non-working, that a friend had some interest in. It was quite a
gamble at the price, in the absence of real tech info. ... Apparently it's been
delisted, so my question is just curiousity at this point.
17 Mar
17 Mar
9:52 a.m.
There was a 5110 on ebay, non-working, that a friend
had some interest
in. It was quite a gamble at the price, in the absence of real tech
info. ... Apparently it's been delisted, so my question is just
curiousity at this point.
I think I know the one, and at that price it was insane even for a fully
working system....
An observation of the so called non-working systems on e-bay:
This seems to be the latest seller scam being fuelled by crazy prices
(anyone see the $3.3K IBM terminal keyboard that sold a couple of weeks
ago?). I am seeing more and more items from sellers who previously would
tout "great shape", "checked by our in house tech",
"refurbished", whatever
other BS as being listed as not-working or even powering on ("system won't
turn on"). I think this is to avoid having to accept returns under the eBay
MB guarantee more than anything. Items being sold for parts/not working have
much less excuse for return vs. "refurbished" which have to work perfectly
fine.
With items selling for prices that would be "crazy" for new old stock item
the eBay sellers don't feel the need to BS about condition anymore. This is
mostly occurring with the warehouse guys that have suddenly found "gold" in
the pile of junk in the back of the warehouse that has been sitting there
since the late 90s/early 2000s. The small time guys or ordinary folks are
still schilling the "worked great when last used but no guarantees" line...
Anybody else seeing this as well?
Just my two cents....
-Ali
10:04 a.m.
My fathers office was in the same building as IBM in Harrison, NY in the
70's.? I was able to play with a 5110 when I visited his office.
I would love to get my hands on one but I can't afford it with the
PDP-8/E money pit that I have ?.
On 3/17/2022 11:26 AM, Brent Hilpert via cctalk wrote:
Does anyone have or know whether the schematics for
the IBM 5110 or 5100 are available?
And the tightly related question of whether anyone has done ROM (ROS) dumps?
There are some service manuals on bitsavers, they are field-service board-level manuals,
mostly step-by-step problem resolution guides, no schematics.
As a system, it's small enough to be reverse-engineered, in that regard it's
tractable. However, it's implemented using IBM's mid-70s PCB and IC technology,
increasing an RE effort by a couple orders of magnitude if not approaching impossible,
unless one were to develop some robotic probing system and software.
There was a 5110 on ebay, non-working, that a friend had some interest in. It was quite a
gamble at the price, in the absence of real tech info. ... Apparently it's been
delisted, so my question is just curiousity at this point.
18 Mar
18 Mar
1:31 a.m.
On Thu, 17 Mar 2022, Brent Hilpert wrote:
Does anyone have or know whether the schematics for
the IBM 5110 or 5100
are available?
No, there are no schematics, only block diagrams. I had created the
schematics for the Async/Serial I/O card years ago (it's a TTL only board)
And the tightly related question of whether anyone has
done ROM (ROS)
dumps?
Yes. I've described the procedure a couple of times in the past ;-)
And FYI, I have also written a 5110 emulator. And I also have reverse
engineered the opcodes (at a time where the 5100 MIM was not available
online).
Everything (ROS listings, dumps, emulator etc) is on our FTP server as
usual. You'll also find my Kermit program and Infocom interpreter
there, both written in PALM assembler.
Christian
1:11 p.m.
On 2022-Mar-18, at 1:31 AM, Christian Corti via cctalk wrote:
On Thu, 17 Mar 2022, Brent Hilpert wrote:
Thanks, found the directories and disassembly files, I'll forward this on.
Does anyone have or know whether the schematics
for the IBM 5110 or 5100 are available?
No, there are no schematics, only block diagrams. I had created the schematics for the
Async/Serial I/O card years ago (it's a TTL only board)
And the tightly related question of whether
anyone has done ROM (ROS) dumps?
Yes. I've described the procedure a couple of times in the past ;-)
And FYI, I have also written a 5110 emulator. And I also have reverse engineered the
opcodes (at a time where the 5100 MIM was not available online).
Everything (ROS listings, dumps, emulator etc) is on our FTP server as usual. You'll
also find my Kermit program and Infocom interpreter there, both written in PALM assembler.
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days inactive
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days old
4 comments
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participants (4)
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bhilpert＠shaw.ca -
bitwiz＠12bitsbest.com -
cc＠informatik.uni-stuttgart.de -
cctalk＠ibm51xx.net