Re: IBM 5110 (5100) schematics ?
On 2022-Mar-18, at 1:31 AM, Christian Corti via cctalk wrote: > 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. Thanks, found the directories and disassembly files, I'll forward this on.
Re: IBM 5110 (5100) schematics ?
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
Re: IBM 5110 (5100)
On 2022-Mar-17, at 8:56 PM, D. Resor wrote: > It looks as if it needs at least a replacement CRT. From one image it > appears to be phosphor is blown away in the middle screen. The only way I > know of this happening, is the neck of the CRT, or the evacuation nipple has > been cracked/broken. Thanks for pointing that out, I hadn't looked closely enough previously to note it. ... there's a 5" CRT monitor from some 70's-era Olivetti machine in my junk box, though it's hard to tell whether it may be a different aspect ratio ...
Re: IBM 5110 (5100)
On 2022-Mar-17, at 9:09 PM, Guy Sotomayor via cctalk wrote: > But it has APL (you can tell by the keyboard *and* the BASIC/APL switch). > > I can't say if the price is worth it for that...but having the APL ROS and > the keytops has some value. Yes, that is the particular interest in this unit by my friend. Do you have any tech knowledge of these models? Was the ROS mask-programmed ROMS? standard types or IBM special? I saw a web page or two with failed units that claimed the fault was the ROS but have no idea from what analysis they believe it to be the ROS.
Re: IBM 5110 (5100)
But it has APL (you can tell by the keyboard *and* the BASIC/APL switch). I can't say if the price is worth it for that...but having the APL ROS and the keytops has some value. TTFN - Guy On 3/17/22 17:56, Brent Hilpert via cctalk wrote: On 2022-Mar-17, at 5:02 PM, D. Resor via cctalk wrote: Was the computer auction in question a 5100 or a 5110? Presently I see there is a 5110-C for sale https://www.ebay.com/itm/294865912729 Yes, that was/is the one. So it has been relisted. It had been listed as a 5100 or 5100-C earlier, then delisted, and I couldn't find a new listing for anything like a 5100 or 5110 this morning. It might be easy to fix. Or it might have the computing potential of a doorstop. There were also a 5110 with 8" external drives and a printer which sold: https://www.ebay.com/itm/304377532685 -- TTFN - Guy
RE: IBM 5110 (5100)
It looks as if it needs at least a replacement CRT. From one image it appears to be phosphor is blown away in the middle screen. The only way I know of this happening, is the neck of the CRT, or the evacuation nipple has been cracked/broken. Don Resor -Original Message- From: cctalk On Behalf Of Brent Hilpert via cctalk Sent: Thursday, March 17, 2022 5:57 PM To: General Discussion: On-Topic and Off-Topic Posts Subject: Re: IBM 5110 (5100) On 2022-Mar-17, at 5:02 PM, D. Resor via cctalk wrote: > Was the computer auction in question a 5100 or a 5110? > > Presently I see there is a 5110-C for sale > https://www.ebay.com/itm/294865912729 Yes, that was/is the one. So it has been relisted. It had been listed as a 5100 or 5100-C earlier, then delisted, and I couldn't find a new listing for anything like a 5100 or 5110 this morning. It might be easy to fix. Or it might have the computing potential of a doorstop. > There were also a 5110 with 8" external drives and a printer which sold: > https://www.ebay.com/itm/304377532685
Re: IBM 5110 (5100)
On 2022-Mar-17, at 5:02 PM, D. Resor via cctalk wrote: > Was the computer auction in question a 5100 or a 5110? > > Presently I see there is a 5110-C for sale > https://www.ebay.com/itm/294865912729 Yes, that was/is the one. So it has been relisted. It had been listed as a 5100 or 5100-C earlier, then delisted, and I couldn't find a new listing for anything like a 5100 or 5110 this morning. It might be easy to fix. Or it might have the computing potential of a doorstop. > There were also a 5110 with 8" external drives and a printer which sold: > https://www.ebay.com/itm/304377532685
Re: IBM 5110 (5100) schematics ?
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.
RE: IBM 5110 (5100) schematics ?
> 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
