test-drb February 2019

test-drb@ccmp.vtda.org

136 participants
165 discussions

AW: 50Hz Pulley for 8" Floppy Drive Mitshubishi M2894-63B

by guykd＠optusnet.com.au

Ok. Those are quite small. So you have one? Or those are not yours? If you have one, and a way to accurately measure it, making more will be easy for anyone with a lathe. I could do it, but surely you can find a machinist closer to home? Guy At 01:03 PM 10/11/2018 +0000, Riesen Thomas wrote: >Guy, >I am looking for small motor pulley ... see pic ... >Regards >Thomas > >-----Urspr?ngliche Nachricht----- >Von: Guy Dunphy [mailto:guykd at optusnet.com.au] >Gesendet: Samstag, 10. November 2018 13:25 >An: Riesen Thomas <thomas.riesen at predata.ch>; General Discussion: On-Topic and Off-Topic Posts <cctalk at classiccmp.org> >Betreff: Re: 50Hz Pulley for 8" Floppy Drive Mitshubishi M2894-63B > >At 12:03 PM 10/11/2018 +0000, you wrote: >>Hi all >> >>Any suggestions where to find two 50Hz-Pulleys for the 8" Floppy drive >>Mitsubishi M2894-63B? >> >>If there also the appropriate ribbon gummies available, I would be very >>happy. >> >>Regards >>Thomas > > >Do you know what they look like, and the dimensions? >Because I have these. http://everist.org/pics/misc/IMG_1655_pulley_800.jpg > >_Maybe_ they were off Mitsubishi drives, not sure. Had them in a box of floppy drive related bits for a loooong time, and have no recollection of where they came from. >These are 49.0 mm OD, hole 4.7 mm dia. And this is Australia, with 50Hz mains. > >Guy > > >Attachment Converted: "f:\email\attach\Pully_8Zoll_02.jpg" > >Attachment Converted: "f:\email\attach\Pully_8Zoll_01.jpg" >

5 years, 9 months

50Hz Pulley for 8" Floppy Drive Mitshubishi M2894-63B

by thomas.riesen＠predata.ch

Hi all Any suggestions where to find two 50Hz-Pulleys for the 8" Floppy drive Mitsubishi M2894-63B? If there also the appropriate ribbon gummies available, I would be very happy. Regards Thomas

5 years, 9 months

Epson PX8 disk emulator

by wrcooke＠wrcooke.net

Hello all, I have built an emulator that uses an Arduino and SD card to provide four "floppy drives" for an Epson PX8.? It may also be usable with a PX4, but I have no way of trying it. If you would like to build one yourself, or just read about it, the details are here:?http://wrcooke.net/projects/pfbdk/pfbdk.html Any feedback is appreciated (I already know the page is crummy.)? Especially if you build it I would like to know good or bad experience. Thanks, Will "He may look dumb but that's just a disguise."? -- Charlie Daniels "The names of global variables should start with? ? // "? --?https://isocpp.org

5 years, 9 months

Rainbow 100 PSU capacitor list

by aperry＠snowmoose.com

Hi, I think that I need to re-cap the power supply in a Rainbow 100. Does anyone here know if anyone has put together a list of capacitors used in the power supply that I can use to order parts? alan

5 years, 9 months

IBM 3174 C 6.4 Microcode Disks?

by Kevin＠RawFedDogs.net

Classic Computer Fans, I posted this to the IBM-Legacy-Hercules mailing list. I just realized it probably wouldn't hurt to post it here too. I'm finally in possession of a box that hopefully is capable or can be made capable of connecting a real terminal to Hercules. It's a 3174 11L. It was retired last year where I work. I finally got the okay to save it from being sent to a scrapper. I love the build quality of older IBM gear, except when I'm trying to move such gear. Between the 3174 and a 9406-520 I also acquired, I pulled or strained something in my left arm moving them into place. It's currently wired to run on 220v. I think I've seen mentioned somewhere that it can be changed to run on 110v. If that's the case, does anyone have a pointer to documentation on what's involved? It has dual floppy drives. At least one drive is a 2.4MB drive. But, all the microcode disks I have are at level B 4.6. Does anyone know where I can get a set of C 6.4 control and control extension disks. From what I've heard those are what's needed to enable an attached terminal to connect to other systems via telnet. It has a token ring card. I will probably be able to get the MAU it was connected to, and possibly the router that acted as a token ring to Ethernet bridge. I'm not sure how much memory it has. Does anyone have any tips on determining the amount of memory it has, and/or identifying its boards? These are the numbers on its boards: 9210 9351 9052 z2 9053 9501 Plus the boards for coax connections. -- Kevin http://www.RawFedDogs.net http://www.Lassie.xyz http://www.WacoAgilityGroup.org Bruceville, TX What's the definition of a legacy system? One that works! Errare humanum est, ignoscere caninum. ------------------------------------ Posted by: Kevin Monceaux <Kevin at RawFedDogs.net> ------------------------------------ ------------------------------------ Yahoo Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/ibm-legacy-hercules/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/ibm-legacy-hercules/join (Yahoo! ID required) <*> To change settings via email: ibm-legacy-hercules-digest at yahoogroups.com ibm-legacy-hercules-fullfeatured at yahoogroups.com <*> To unsubscribe from this group, send an email to: ibm-legacy-hercules-unsubscribe at yahoogroups.com <*> Your use of Yahoo Groups is subject to: https://info.yahoo.com/legal/us/yahoo/utos/terms/ -- Kevin http://www.RawFedDogs.net http://www.Lassie.xyz http://www.WacoAgilityGroup.org Bruceville, TX What's the definition of a legacy system? One that works! Errare humanum est, ignoscere caninum.

5 years, 9 months

PDP-11/60 manuals needed

by jnc＠mercury.lcs.mit.edu

> From: Jay Jaeger > I have EK-11060-OP-003: "PDP-11/60 installation and operation manual" > and an update EK-11060-OP-C1. Yeah, that's the one I referred to as "the general -11/60 manual"; generally, there's one such for all the -11 models, but the exact name varies from model to model (unlike, say, the CPU tech manuals, the name for which is pretty predictable). > let me know and I will scan it in and stick it on my Google drive in a > day or two or three That would be great; thanks very much! No rush at all... > I also have a spare processor handbook, EB-06498-20/77 We do have that one, thanks. BTW, looking a little more closely at the cabinet/power-supply manual (pg. 1-7), the KD11-K TM might _only_ be available on fiche. If so, that'll be the first time I've ever seen that. Oddly enough, further down the page, the FP11-E TM seems to be available in printed form (EK-FP11E-TM). > From: Ethan Dicks <ethan.dicks at gmail.com> > I've seen Tech Manuals printed as 2-up on C-sized paper Yeah, generally things from the -11/20 era are like that (e.g. the RK11-C manual). Nothing later than that that I've ever seen, though. >>> I have the two BA11 cabinets for an 11/60, the PSUs, and the front >>> panel (I'm missing the rack). > "the rack" is just the outer box with rails (not an H960 - whatever the > designation is for the odd 11/60 cabinet). I think it's the H9500 low-boy corporate cabinet, per Chapter 5 in the cabinet/power manual. > The backplanes are in the BA11s. I seem to have both MOS and core > memory and, I am fairly sure, an RK611, along with the CPU. I need to > take a module inventory. You seem to have most of the crucial bits, although you might be missing the power harness. Do you have the optional WCS module (M7870)? There are also ROM modules, and a diagnostic module, that can go in that slot - only one of the three at a time, though. Noel

5 years, 9 months

Data Systems Design DSD-4140 microcode PROMs

by jzatar2＠illinois.edu

Hello Everyone, We found a PDP-11 QBUS card cage with a KDF11 and some other cards (RAM, ROM, some basic peripherals) which included a DSD-4140 card. Unfortunately, the DSD-4140 is missing one of it's microcode PROMs for some reason. Does anyone else have one of these cards? It'd be really helpful if we could get some dumps of the 4 microcode PROMs so we can compare what we have and look into replacing what we don't have with an adapted modern part. (and if anyone goes to the trouble to read the 4 microcode PROMs, there's also an 82S137 that deserves to be dumped). Here's a picture of the card in question: https://i.imgur.com/tzYjPYF.jpg Regards, Joe Zatarski

5 years, 9 months

eBay: RCA CDP1802

by anders.k.nelson＠gmail.com

IIRC someone on this list was asking for an 1802 some time ago... https://www.ebay.com/itm/CDP1802-CPU/132727125007 =] -- Anders Nelson +1 (517) 775-6129 www.erogear.com

5 years, 10 months

V6 cc needs hash before whitespace before first include?

by fritzm＠fritzm.org

So, I've been having some fun playing around with V6 Unix on my 11/45 a bit after that last repair. I've just been tripped up for a little over the fact that the C compiler barfs if there is whitespace/comentary before the first #include; the workaround seems to be to add a lone '#' at the beginning of the file. It took me a while to notice that this was done, for example, in all of the device driver sources. I found this curious. Anybody know what the story is there? --FritzM.

5 years, 10 months

V6 cc needs hash before whitespace before first include?

by blstuart＠bellsouth.net

On Thu, 2/28/19, Fritz Mueller via cctalk <cctalk at classiccmp.org> wrote: > I've just been tripped up for a little > over the fact that the C compiler barfs if there is > whitespace/comentary before the first #include; the > > I found this curious.? Anybody > know what the story is there? My recollection is that it's documented in the 6th Ed C manual that # has to be in the first column. Beyond that, I vaguely recall something to the effect that if the first line isn't a preprocessor directive, then it skips any preprocessing at all. BLS

5 years, 10 months

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test-drb February 2019