[cctalk] Re: IBM RT Graphics

On Wed, Jun 7, 2023 at 2:26 PM Jonathan Katz via cctalk < cctalk@classiccmp.org> wrote: > I have an IBM 6152 aka IBM RT system I rescued. (It may be a 6151?) > I'm 90% sure it has colour graphics. The system does seem to POST > correctly (according to the LED on the front) but the CRT is dead. I'm

[cctalk] Re: IBM RT Graphics

On 2023-06-08 06:12, Santo Nucifora via cctalk wrote: I got the 3W3 connector and parts from Digikey. Here's what that looks like: https://vintagecomputer.ca/wp-content/uploads/2023/06/IBM_RT_3W3_RGB-rotated.jpg Please forgive the crude construction. I didn't think it would work but it did.

[cctalk] Re: IBM RT Graphics

Looking back, I did buy one from Digikey but it was not the right one. I bought mine from this ebay auction: https://www.ebay.com/itm/171649843131 Specifically, the "D-SUB 3W3 Male" item. I did not install the three metal coax covers that come with it. The end looks like this: https://vintageco

[cctalk] Re: Source for NEW (unused) punch tape

Someone did a paper-slitter in this thread https://forum.vcfed.org/index.php?threads/paper-tape-punch-service-and-request.1242805/page-2#post-1319033 On Mon, Jun 05, 2023 at 06:19:26PM -, robot...@gmail.com wrote: > For various reasons (including, but not limited to, insanity and > obsessive

[cctalk] Re: Source for NEW (unused) punch tape

I think paper-slitters are pretty common. That is to say, if you go to anyone manufacturing adding machine rolls they will have the capability to make custom widths in rather small job lots. It's an industry comparable with printing (and often combined, for when till rolls with custom printing is d

[cctalk] Re: IBM RT Graphics

On Thursday, June 8, 2023 at 05:20:28 AM PDT, Santo Nucifora via cctalk wrote: > I bought mine from this ebay auction:  https://www.ebay.com/itm/171649843131 >Specifically, the "D-SUB 3W3 Male" item.  [...] Note these are 50 Ohm impedance. I always assumed the OEM originals were 75 Ohm. I've

[cctalk] Re: Source for NEW (unused) punch tape

On 6/8/23 08:52, Adrian Godwin via cctalk wrote: > I think paper-slitters are pretty common. That is to say, if you go to > anyone manufacturing adding machine rolls they will have the capability to > make custom widths in rather small job lots. It's an industry comparable > with printing (and ofte

[cctalk] Re: Source for NEW (unused) punch tape

A slitter is a wide paper feed system with sharp-edged pulleys over which it passes. There are quite a few videos of this on youtube, it's surprisingly well documented. Because slitter manufacturers are selling to mom-and-pop outfits. I think the tape is supplied unpunched and the tape punch makes

[cctalk] Re: IBM RT Graphics

On 6/8/23 11:06, Jonathan Stone via cctalk wrote: On Thursday, June 8, 2023 at 05:20:28 AM PDT, Santo Nucifora via cctalk wrote: I bought mine from this ebay auction:https://www.ebay.com/itm/171649843131 Specifically, the "D-SUB 3W3 Male" item. [...] Note these are 50 Ohm impedance. I alw

[cctalk] Re: Source for NEW (unused) punch tape

The punch (on an ASR33 anyway) punches the feed (center) holes. All the rolls I have are completely unperforated. -Original Message- From: Chuck Guzis via cctalk [mailto:cctalk@classiccmp.org] Sent: Thursday, June 08, 2023 12:10 PM To: Adrian Godwin via cctalk Cc: Chuck Guzis Subject:

[cctalk] Re: IBM RT Graphics

> On Jun 8, 2023, at 12:06 PM, Jonathan Stone via cctalk > wrote: > > On Thursday, June 8, 2023 at 05:20:28 AM PDT, Santo Nucifora via cctalk > wrote: > >> I bought mine from this ebay auction: https://www.ebay.com/itm/171649843131 >> Specifically, the "D-SUB 3W3 Male" item. > > [...] >

[cctalk] Re: Source for NEW (unused) punch tape

The puches I have knowledge of do all 9 holes. Similarly, the blank tape stock (of my acquaintance) is unpunched. Martin -Original Message- From: William Sudbrink via cctalk [mailto:cctalk@classiccmp.org] Sent: 08 June 2023 17:34 To: 'General Discussion: On-Topic and Off-Topic Posts' Cc:

[cctalk] Re: Source for NEW (unused) punch tape

I have a few saved searches on eBay. I think these are not a bad price. https://www.ebay.com/itm/392994905002 My GNT4601 punches the guide holes and uses unperforated tape too. On Thu, Jun 8, 2023 at 10:34 AM William Sudbrink via cctalk < cctalk@classiccmp.org> wrote: > The punch (on an ASR33

[cctalk] Re: Source for NEW (unused) punch tape

> On Jun 8, 2023, at 12:21 PM, Adrian Godwin via cctalk > wrote: > > A slitter is a wide paper feed system with sharp-edged pulleys over which > it passes. There are quite a few videos of this on youtube, it's > surprisingly well documented. Because slitter manufacturers are selling to > mom-

[cctalk] Re: Source for NEW (unused) punch tape

On 6/8/23 09:51, Martin Bishop via cctalk wrote: > The puches I have knowledge of do all 9 holes. > Similarly, the blank tape stock (of my acquaintance) is unpunched. That would figure in why I occasionally see tapes with irregularly-spaced feed holes. That clears that mystery up. Instead of pl

[cctalk] Re: Source for NEW (unused) punch tape

> On Jun 8, 2023, at 1:05 PM, Chuck Guzis via cctalk > wrote: > > On 6/8/23 09:51, Martin Bishop via cctalk wrote: >> The puches I have knowledge of do all 9 holes. >> Similarly, the blank tape stock (of my acquaintance) is unpunched. > > That would figure in why I occasionally see tapes wit

[cctalk] Re: Source for NEW (unused) punch tape

On Thu, Jun 8, 2023 at 6:01 PM Paul Koning wrote: > I wonder if mylar tape for punching could be found, or made. That was > seen occasionally, for applications where a tape needed to be read many > times. An OS binary tape might want that. I also remember seeing it on a > machine in my father'

[cctalk] Re: Source for NEW (unused) punch tape

On 6/8/23 10:18, Adrian Godwin via cctalk wrote: > I've seen mylar tape used in a tiny loop where it controlled the movements > of a printer platen. I don't recall now whether it was used for horizontal > or vertical space - my recollection was the latter but it was a long time > ago. The 12-chan

[cctalk] Re: Source for NEW (unused) punch tape

IIRC the Centronics 101 printers did this.   It was for vertical spacing - you could put different loops in for different form lengths. I used to service them (mostly replacing heads) but never operated :-) cheers, Nigel On 2023-06-08 13:18, Adrian Godwin via cctalk wrote: On Thu, Jun 8, 2

[cctalk] Re: Source for NEW (unused) punch tape

Pun h makes all  holesEd#         SMECC  Sent from AOL on Android On Thu, Jun 8, 2023 at 9:21 AM, Adrian Godwin via cctalk wrote: A slitter is a wide paper feed system with sharp-edged pulleys over which it passes. There are quite a few videos of this on youtube, it's surprisingly well do

[cctalk] Re: Source for NEW (unused) punch tape

> On Jun 8, 2023, at 1:18 PM, Adrian Godwin wrote: > > ... > I've seen mylar tape used in a tiny loop where it controlled the movements of > a printer platen. I don't recall now whether it was used for horizontal or > vertical space - my recollection was the latter but it was a long time ago

[cctalk] Re: First non-IBM PC-DOS Compatible PC

Fred Cisin says: > Then, Toshib NMRI in Silicon Valley needed to be able to handle > Toshiba 80 track format disks for communication with home office, so > I gave the T300s to them. So a Toshiba office did not have computer equipment compatible with what its headquarters used? -- geo:37.78,

[cctalk] Re: Source for NEW (unused) punch tape

This wasn't a large IBM lineprinter and I'm pretty sure it was 1" tape, but it may well have been inspired by those machines. It would likely have been used with custom fanfold paper for invoices, cheques etc. - certainly the same sort of customer-specific those machines dealt with, but for the sm

[cctalk] Re: First non-IBM PC-DOS Compatible PC

Then, Toshib NMRI in Silicon Valley needed to be able to handle Toshiba 80 track format disks for communication with home office, so I gave the T300s to them. On Thu, 8 Jun 2023, Yeechang Lee via cctalk wrote: So a Toshiba office did not have computer equipment compatible with what its headqua

[cctalk] Re: First non-IBM PC-DOS Compatible PC

Then, Toshib NMRI in Silicon Valley needed to be able to handle Toshiba 80 track format disks for communication with home office, so I gave the T300s to them. On Thu, 8 Jun 2023, Yeechang Lee via cctalk wrote: So a Toshiba office did not have computer equipment compatible with what its headqu

[cctalk] Looking for information on Data General 602X magtape drive

Hello CCtalk, I recently bought the mortal remains of a Data General 602X magtape drive on craigslist. Apparently it had been stored outside.  When I got it it had mudwasp nests and mud all over it and everything that could rust had. When it was decomissioned it was just cut out, so it's mi

[cctalk] Re: Looking for information on Data General 602X magtape drive

On Thu, Jun 8, 2023 at 2:53 PM Bjoren Davis via cctalk < cctalk@classiccmp.org> wrote: > > When it was decomissioned it was just cut out, so it's missing its > chassis, hinges, controller board, power supplies, vacuum blower, vacuum > pressure limit switches, etc. The cables to the heads are just

[cctalk] Re: IBM RT Graphics

On 2023-06-08 08:20, Santo Nucifora wrote: Looking back, I did buy one from Digikey but it was not the right one. I bought mine from this ebay auction: https://www.ebay.com/itm/171649843131   Specifically, the "D-SUB 3W3 Male" item.  I did not install th