test-drb

test-drb@ccmp.vtda.org

101090 discussions

by tmfdmike＠gmail.com

Folks, I'm still probing the alleged "parallel ASCII" interface that was supposedly fitted to my 'Western I/O' converted IBM 2970 Selectric. Here's where we're at: http://corestore.org/2970pins.jpg I've traced the pins from the DB25 connector back to the board; the ribbon cable in the above pic is straight-through to the DB25. It doesn't resemble any interface with which I'm familiar, and I can't see how it can possibly be parallel. Only the following pins (these are the DB25 pin numbers remember) connect to any pins or devices on the interface board: 9, 10, 11, 13, 17, 19, 21, 22, 23, 24. All other pins are either unconnected, or ground. Of the above 10 pins, 11, 13, 22 & 23 are high at power-up (printer NOT connected to any interface). The only pin with known function is 19, which is 'paper out'; if I toggle the paper out switch I can see it going high and low. There is no frigging way that can be a conventional 8-bit parallel interface, obviously, with only 10 pins in use, and 4 or 5 of them (depending on paper out) high on power-up - obviously signaling something. Whatever it is, most of the pins are driven by an IC - an Allen Bradley 314B102. Google has nothing, except a few for sale. No datasheet anywhere I can find. Can anyone give me a clue as to the purpose and pinouts of an Allen Bradley 314B102??!! Here's the component side of the driver board, the interface and 314B102 bottom right: http://corestore.org/2970driver.jpg Help? Please? Anyone out there with old reference material? Anyone make a stab at what the hell this interface might be??? Maybe, maybe, it's some kind of custom 'internal' interface and was intended to be used with a (missing) external converter box/cable that made a standard parallel interface of it?? Mike http://www.corestore.org 'No greater love hath a man than he lay down his life for his brother. Not for millions, not for glory, not for fame. For one person, in the dark, where no one will ever know or see.'

10 years, 2 months

What did computers without screens do?

by jnc＠mercury.lcs.mit.edu

> From: Chuck Guzis > It's also occurred to me that without screens, we might be better off > today ... The average web-surfing experience blasts the user with tons > of filigree and useless data, but very little useful information. ... > Web sites that have multi-megabyte splash screens that serve no purpose > other than tell you that you've arrived. Agree completely. The amount of useless 'eye candy' on the average Web page is, well, appalling. But then again, the low S/N on developing technologies, as worthless content expands faster than high quality - well, that's nothing new, look at TV. > (oh boy, am I going to get flack on this one) Not so much! Most seem to agree, actually! :-) > Data is cheap and Parkinson's law applies. "90% of _everything_ is crap!" Noel

10 years, 2 months

IBM PS/2 Model 70 HARD DRIVE NEEDED

by COURYHOUSE＠aol.com

OK Yea they were odd inside we have tower here.. think it is a 70 and a 17" or 19 inch MONSTER ibm monitor ( alas B/W). Years and Years ago someone dumped a bunch at a thrift shop.. lots of them! neat here I wish I had kept more of them... I kept the tower and let the desk tops go you see seldom any of these around here. We also kept a LAPTOP IBM with dual floppies and a odd plasma screen all in one IBM computer... and we have an IBM that is like the Compaq Portable and of course a first PC ( where do I get Charlie Chapman look-a-like to have next to it!?) Ed# _www.smecc.org_ (http://www.smecc.org) In a message dated 12/18/2015 12:08:25 A.M. US Mountain Standard Tim, ggs at shiresoft.com writes: No they weren't SCSI. Those were only through either a "spock" or "tribble" MCA card. Those were the code names. I have *no* idea what the "real" IBM designation was. ;-) The desktop PS/2 machines (50, 50Z, 70, etc) were all designed with robotic assembly in mind (that's why there are no screws or cables in those machines). To accomplish that the HDD was a non-standard connector. TTFN - Guy On 12/17/15 10:30 PM, COURYHOUSE at aol.com wrote: > did all mod 70s have SCSI drives? > > Ed# > > > In a message dated 12/17/2015 10:54:50 P.M. US Mountain Standard Tim, > mokuba at gmail.com writes: > > I never saw this post, but did end up with a 30MB. I will take another if > available though. > > On Sat, Mar 21, 2015 at 1:27 PM, Daniel Snyder <ddsnyder at zoominternet.net> > wrote: > >> Still looking? >> ----- Original Message ----- From: "Gary Sparkes" <mokuba at gmail.com> >> To: "General Discussion: On-Topic and Off-Topic Posts" < >> cctalk at classiccmp.org>; <unallocated-space at googlegroups.com>; " >> Blabber at hacdc.org" <blabber at hacdc.org>; "HacDC Members Discussion List" < >> members at hacdc.org> >> Sent: Monday, February 16, 2015 9:31 PM >> Subject: IBM PS/2 Model 70 HARD DRIVE NEEDED >> >> >> >> Got a hard down situation and need to re-install/recreate the BBS system > I >>> had running. >>> >>> HDD makes swishy noises when shaken, haven't tried stirring yet. >>> >>> I /guess/ a bootable MCA SCSI card would work too... ;) >>> >>> I had the 160MB drive, but anything above 30 would work - i guess i'll >>> just >>> have to use a SCSI Drive for the file storage area once i get an MCA > SCSI >>> card .... >>> >>> -- >>> Gary G. Sparkes Jr. >>> KB3HAG >>> >> > > -- > Gary G. Sparkes Jr. > KB3HAG >

10 years, 2 months

Classic CMP list fall over again?

by woyciesjes＠sbcglobal.net

Did the email server fall over again? -- --- Dave Woyciesjes --- ICQ# 905818 --- CompTIA A+ Certified IT Tech -http://certification.comptia.org/ --- HDI Certified Support Center Analyst -http://www.ThinkHDI.com/ Registered Linux user number 464583 "Computers have lots of memory but no imagination." "The problem with troubleshooting is that trouble shoots back." - from some guy on the internet.

10 years, 2 months

Decisions you regret (classiccmp related)

by jwest＠classiccmp.org

Noel wrote.... ----------------- Every time I think about it I kick myself... Sigh! Although I suspect a lot of people here have stories like that... ----------------- Yeah Noel, we all do. I had a couple different really great machines offered to me long before I got into collecting. A DG nova 3 and an IBM System/3 come to mind, I'm sure there were others. I declined and they were scrapped. But here's one with a good ending.... Many years ago (I was around 19 years old) I acquired two Microdata Reality M1600 core machines (including full schematics and source code, completely unheard of for those machines). These two particular systems were very unique (basically one of a kind) even within the microdata world. After a time my parents ordered them out of the house and a "friend" agreed to store them. A few weeks after moving them to his house, he informed me that he gave them away and wouldn't tell me to who/where. Decades later I got into collecting, found the classiccmp list, met Jim Stephens here, and we've talked on the phone and met due to our shared history/interest in Pick-based machines. During one conversation it was discovered that - not directly, but through several chains of trades/sales/pickups - Jim Stephens had those exact two systems that I used to own. Given the unique nature of the two machines, there's no doubt they are the exact same ones. But we've also discussed the details of who we each knew, and pretty much ironed out who all's hands they passed through between him and I over the years. So... while I am sad I "let those machines go"... it's great to know that they eventually wound up in a great home of a fellow collector that I know - instead of the shredder! Best, J

10 years, 2 months

Mystery IC: Allen Bradley 314B102

by gerardcjat＠free.fr

@ Brent Hilpert May I ask what software you use for creating your schematics ?? I like the way gates are drawn. Thanks ! --- L'absence de virus dans ce courrier ?lectronique a ?t? v?rifi?e par le logiciel antivirus Avast. https://www.avast.com/antivirus

10 years, 2 months

Re-inking printer ribbons

by jules.richardson99＠gmail.com

Has anyone had any luck re-inking printer ribbons? I spent a few minutes looking at this Vic 1525 printer that I got the other day - turned out that the carriage was just gummed up and there was a blown fuse in the PSU section (probably related to the former problem). Of course the ribbon is completely dried out. I'd originally intended for the printer to be a static "Hey, that looks neat" item, but looking at it briefly, it's a good example of how to make a printer as cheaply as possible, so I'm wondering if there's a way of breathing life back into the ribbon so that it can print again in all it's noisy, glacially-slow glory :-) I don't care if it's not as black as an original ribbon would have been - it just might be nice if it was able to print something legible. cheers Jules

10 years, 2 months

Decisions you regret

by mark＠markesystems.com

From: "js at cimmeri.com" <js at cimmeri.com> Subject: Re: Decisions you regret > mark at markesystems.com wrote: >> >> Yep. Among the things that I have >> given away (to Goodwill, or possibly >> Salvation Army) - all in running >> condition: > .... > > I'm going to go shoot myself now. > ~~ > > I'm curious, why were these given to > a Goodwill / Salvation Army of all > places? These places don't have the > first clue of what to do with items like > these.. and they tend to be overwhelmed > with stuff anyway. Not everything goes > out for sale. My reasons at the time: - All equipment was pretty much at its minimum value-wise - It could still be priced relatively highly for tax deduction reasons - I was very space constrained, and not using it at the time - I'd just gotten married (see "Spousal unit", in a later post) None of them good enough in hindsight for the value that equipment would have now, either to me or others. Damn - too bad I pawned that old Colt Paterson - I bet it would be worth something by now... ~~ Mark Moulding

10 years, 2 months

TOP POSTING (was: RE: Best 200 buck I have ever spent!!! Deal of a lifetime!!!

by jwest＠classiccmp.org

Please make an effort not to top-post :| J

10 years, 2 months

IBM PS/2 Model 70 HARD DRIVE NEEDED

by COURYHOUSE＠aol.com

did all mod 70s have SCSI drives? Ed# In a message dated 12/17/2015 10:54:50 P.M. US Mountain Standard Tim, mokuba at gmail.com writes: I never saw this post, but did end up with a 30MB. I will take another if available though. On Sat, Mar 21, 2015 at 1:27 PM, Daniel Snyder <ddsnyder at zoominternet.net> wrote: > Still looking? > ----- Original Message ----- From: "Gary Sparkes" <mokuba at gmail.com> > To: "General Discussion: On-Topic and Off-Topic Posts" < > cctalk at classiccmp.org>; <unallocated-space at googlegroups.com>; " > Blabber at hacdc.org" <blabber at hacdc.org>; "HacDC Members Discussion List" < > members at hacdc.org> > Sent: Monday, February 16, 2015 9:31 PM > Subject: IBM PS/2 Model 70 HARD DRIVE NEEDED > > > > Got a hard down situation and need to re-install/recreate the BBS system I >> had running. >> >> HDD makes swishy noises when shaken, haven't tried stirring yet. >> >> I /guess/ a bootable MCA SCSI card would work too... ;) >> >> I had the 160MB drive, but anything above 30 would work - i guess i'll >> just >> have to use a SCSI Drive for the file storage area once i get an MCA SCSI >> card .... >> >> -- >> Gary G. Sparkes Jr. >> KB3HAG >> > > -- Gary G. Sparkes Jr. KB3HAG

10 years, 2 months

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