Re: IBM MST extender cards
On Fri, Oct 11, 2019 at 03:17:38PM +1000, Steve Malikoff via cctalk wrote: > But I do still have the tool bag identical to the one in the foreground, > in the same russet brown colour but the zipper canvas has dry rotted. Oh wow, what a great resource page :-) What I kind of meant to imply was "but doesn't *everyone* have one?" Sigh. It's probably over in the same closet as my ear trumpet ... mcl
Re: IBM MST extender cards
Mark said > On Fri, Oct 11, 2019 at 10:16:34AM +1000, Steve Malikoff via cctalk wrote: >> That wire wrap tool is identical to one my dad had in his CE toolkit > > I ... should take it from this that people don't just *own* these anymore? > > This was an "essntial device" in my younger engineering days. Sigh. > > Yes, I still have it. Yes, I have used it (albeit not recently). Yes, > I have used the Gardner-Denver electric tool as well, although in those > days I never could have afforded it. I am not sure whether you meant "don't just own" or "just don't own", but the last time we used it was to wire wrap a 2716 eprom programmer S-100 board we designed (ok, he designed, but I helped build it) back in about 1981/82 or so. I haven't seen or thought of it since then, but seeing it in the photo instantly brought back the memory of it. I have some of the tools, others have gone missing, for instance the large tool bag at the rear of the first photo on https://slx-online.biz/hursley/ce-data-list.asp?hur_archive=2 But I do still have the tool bag identical to the one in the foreground, in the same russet brown colour but the zipper canvas has dry rotted.
Re: IBM MST extender cards
On Fri, Oct 11, 2019 at 10:16:34AM +1000, Steve Malikoff via cctalk wrote: > That wire wrap tool is identical to one my dad had in his CE toolkit I ... should take it from this that people don't just *own* these anymore? This was an "essntial device" in my younger engineering days. Sigh. Yes, I still have it. Yes, I have used it (albeit not recently). Yes, I have used the Gardner-Denver electric tool as well, although in those days I never could have afforded it. mcl
Re: IBM MST extender cards
Al said > https://www.ebay.com/itm/352810055470 > > are these extender cards for IBM MST modules? > > Very nice, great find. That wire wrap tool is identical to one my dad had in his CE toolkit (now lost unfortunately). Are there any other markings on it apart from the IBM p/n?
Re: Mystery chip SCM44506L
That would make sense if these were OTP or fused parts. Wouter, can you check the pins with an ohm meter, to what we think are power and ground. Outputs usually look different than inputs. Dwight From: cctalk on behalf of Brent Hilpert via cctalk Sent: Thursday, October 10, 2019 10:22 AM To: General Discussion: On-Topic Posts Subject: Re: Mystery chip SCM44506L On 2019-Oct-10, at 5:33 AM, Wouter de Waal via cctech wrote: >> Very likely a semi custom or custom memory device, due to the prefix. > > Armed with that and the fact that pin 1 connects to the leadframe I figured > maybe it's something like the 6830 Mikbug prom -- 0V on 1, 5V on 12, data on > the left, address on the right. Tried reading it like that (for all 16 > combinations of chip selects) but 0xFF throughout. > > So I popped the lid, stuck it under a microscope. The chip says "MCM6816" > which is in fact a 1k ROM. > > Anyone have more information on the 6816 ROM? Funny, the usual goto reference for early 6800-series chips is the 6800 Micro System Design manual: http://bitsavers.org/components/motorola/6800/MC6800_Microcomputer_System_Design_Data_1976.pdf but it's not in there. There are a couple of other 1K ROMs however (6830,68308). Might compare pinout with those.
DEC Rainbow Univation Docs / Software
This is a bit of a hail mary... I recently won a Univation Intenral Hard Disk System for the DEC Rainbow 100 card, memory and drive. But it came with the wrong docs and no diskettes. Any chance that anybody has anything in this area squirreled away somewhere? Warner
Re: IBM MST extender cards
cool. there was also a 327x debug box that I won https://www.ebay.com/itm/Vintage-IBM-Tester-in-Case-with-Templates-IBM-Collector/352805885595 On 10/10/19 11:54 AM, Lawrence Wilkinson via cctalk wrote: > On 10/10/19 7:49 PM, Al Kossow via cctalk wrote: >> https://www.ebay.com/itm/352810055470 >> >> are these extender cards for IBM MST modules? >> > They look like it, with a right-angle adapter plugged into the end. > >
Re: IBM MST extender cards
On 10/10/19 7:49 PM, Al Kossow via cctalk wrote: > https://www.ebay.com/itm/352810055470 > > are these extender cards for IBM MST modules? > They look like it, with a right-angle adapter plugged into the end. -- Lawrence Wilkinson lawre...@ljw.me.uk Ph +41(0)79 926 1036 http://www.ljw.me.uk
Re: Mystery chip SCM44506L
On 2019-Oct-10, at 5:33 AM, Wouter de Waal via cctech wrote: >> Very likely a semi custom or custom memory device, due to the prefix. > > Armed with that and the fact that pin 1 connects to the leadframe I figured > maybe it's something like the 6830 Mikbug prom -- 0V on 1, 5V on 12, data on > the left, address on the right. Tried reading it like that (for all 16 > combinations of chip selects) but 0xFF throughout. > > So I popped the lid, stuck it under a microscope. The chip says "MCM6816" > which is in fact a 1k ROM. > > Anyone have more information on the 6816 ROM? Funny, the usual goto reference for early 6800-series chips is the 6800 Micro System Design manual: http://bitsavers.org/components/motorola/6800/MC6800_Microcomputer_System_Design_Data_1976.pdf but it's not in there. There are a couple of other 1K ROMs however (6830,68308). Might compare pinout with those.
IBM MST extender cards
https://www.ebay.com/itm/352810055470 are these extender cards for IBM MST modules?
Re: Mystery chip SCM44506L
Maybe they are OTP? Dwight From: cctech on behalf of Wouter de Waal via cctech Sent: Thursday, October 10, 2019 5:33 AM To: cct...@classiccmp.org Subject: Re: Mystery chip SCM44506L > >Very likely a semi custom or custom memory device, due to the prefix. Armed with that and the fact that pin 1 connects to the leadframe I figured maybe it's something like the 6830 Mikbug prom -- 0V on 1, 5V on 12, data on the left, address on the right. Tried reading it like that (for all 16 combinations of chip selects) but 0xFF throughout. So I popped the lid, stuck it under a microscope. The chip says "MCM6816" which is in fact a 1k ROM. Anyone have more information on the 6816 ROM? Thanks W
RE: Mystery chip SCM44506L
http://www.swtpc.com/mholley/Notebook/Notebook_Index.htm Maybe useful? -Original Message- From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Wouter de Waal via cctalk Sent: Thursday, October 10, 2019 7:33 AM To: cct...@classiccmp.org Subject: Re: Mystery chip SCM44506L > >Very likely a semi custom or custom memory device, due to the prefix. Armed with that and the fact that pin 1 connects to the leadframe I figured maybe it's something like the 6830 Mikbug prom -- 0V on 1, 5V on 12, data on the left, address on the right. Tried reading it like that (for all 16 combinations of chip selects) but 0xFF throughout. So I popped the lid, stuck it under a microscope. The chip says "MCM6816" which is in fact a 1k ROM. Anyone have more information on the 6816 ROM? Thanks W -- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus
Re: Mystery chip SCM44506L
Very likely a semi custom or custom memory device, due to the prefix. Armed with that and the fact that pin 1 connects to the leadframe I figured maybe it's something like the 6830 Mikbug prom -- 0V on 1, 5V on 12, data on the left, address on the right. Tried reading it like that (for all 16 combinations of chip selects) but 0xFF throughout. So I popped the lid, stuck it under a microscope. The chip says "MCM6816" which is in fact a 1k ROM. Anyone have more information on the 6816 ROM? Thanks W
