test-drb May 2014

test-drb@ccmp.vtda.org

171 participants
188 discussions

by isking＠uw.edu

> > Date: Sat, 17 May 2014 18:38:02 +0200 > From: Marco Rauhut <marco at familie-rauhut.eu> > To: General Discussion: On-Topic and Off-Topic Posts > <cctalk at classiccmp.org> > Subject: Re: DEC TU56 dual drive and it's modules > Message-ID: <5377906A.8060909 at familie-rauhut.eu> > Content-Type: text/plain; charset=ISO-8859-15; format=flowed > > The tip with the look on the wiering of the backplane bring "light" into > the darknes. > Now the most Modules in right placees.... > Only two module places left for confirmation. > > Thanks to all so much! > > > Am 16.05.2014 22:33, schrieb Tony Duell: > >> In the engeneering drawings "Module Utilization" are shown special > >> places for each module. In my drive the Modules on different places then > >> in the drawing. > >> Is the backplane a real bussystem or got i use the ports shown in > drawings? > > > > The T56 is most definitely not a bused backplane, the modules have to be > > in the right slots. > > > > I think exacltly which modules you need depeends on the controlleryou are > > uisng it with. So you might need ot check that. > > > > And DEC often drew the modual utilisation diagram looking a the _wiring_ > > side of the backpl;ane, not at the modules. It's a mirror image of what > > you might expect. > > > > -tony > > This may have been mentioned and I missed it, but just in case: if the drive unit was connected to a TCxx (typically a TC08) then it will not have the G888s in its backplane. I believe you stated you want to connect this to a TD8E, in which case you need the G888s. I'm sorry to say, they are quite hard to find and when you do find them (quantity 5), you will pay dearly for them. That's been my experience - I have a TU56 that's been languishing while I try to locate G888s for less than a mortgage payment. Also, in case you haven't noticed this already: the TU56 has an internal power supply that runs the motors and some of the control circuits, but also requires an external supply for the logic. -- Ian -- Ian S. King, MSIS, MSCS Ph.D. Candidate The Information School University of Washington Madness takes its toll - please have exact change.

10 years, 7 months

HP-IL to SCSI Adapter

by dm561＠torfree.net

----- Original Message ----- > Date: Sun, 18 May 2014 19:31:36 -0600 > From: Eric Smith <spacewar at gmail.com> > To: "General Discussion: On-Topic and Off-Topic Posts" > > On May 18, 2014 7:22 PM, "Jason T" <silent700 at gmail.com> wrote: >> single-purpose utility. Too bad, I'd have been tickled to see a 110 >> (had to look up "Portable Plus" to find that they were the same) with > > Not quite the same, though very similar. The "Portable" is the HP 110, and > the "Portable Plus" is the HP 45711. ----- Reply: ----- A little clarification: HP Portable (HP110): Model 45710A, 80x16 screen. HP Portable Plus (HP110 Plus): Model 45711A, very similar indeed but with 80x25 screen, expandable RAM & ROM and a faster (now optional) modem.

10 years, 7 months

HP-IL to SCSI Adapter

by silent700＠gmail.com

I acquired one of these recently (HP P/N 5061-3166) and I'd like to know more about it. For which equipment was it intended? With what other non-intended equipment could it be used? I scanned the info sheet that came with it and posted it here (PDF:) http://chiclassiccomp.org/docs/content/computing/HP/5959-1451_E2_HP-IL_SCSI… It did not include the power adapter but at least I have a part number for it so finding a substitute shouldn't be too difficult. Seems to be the same one used with the 95LX, giving 9VAC. The sheet tells you to call the HP BBS (heh) and download SCSIDISK.EXE, which suggests that this was targeted to a DOS machine. >From what I know of HP DOS boxes with HP-IL connectors, that means the HP 110 or the LX series of palmtops. Although on second reading, it seems as if that would only be to "perform SCSI diagnostics," so it's possible that this interface may also have worked with non-DOS HPs. Anyone have any clues to throw out?

10 years, 7 months

IBM 5170 substitute hard disk??

by enrico.lazzerini＠email.it

Hi, I have an old IBM 5170 with motherboard Type 1 without any old hard drive. I could can also reprogram the EPROM system to enter different geometries of disks, but was wondering, how could I possibly replace the disc with a cf-IDE40 adapter like this: http://www.idotpc.com/TheStore/pc/catalog//products/accessories/cfide401big. jpg <http://www.idotpc.com/TheStore/pc/catalog/products/accessories/cfide401big. jpg> Thanks for any suggestions. Enrico

10 years, 7 months

Free: Macintosh IIcx motherboard

by gustavoknemanu＠aol.com

Hi, I'm looking for 820-0230-B Mother board, and somebody tell do you have one, do you have it..?

10 years, 7 months

Does anyone have a TI PAL20L8 reader?

by brain＠jbrain.com

I have one of the very few working memory expansion units for the Commodore 65. It contains a PAL 20L8, and I don't have a reader for that IC (my FLASH/EPROM programmer doesn't do 20L8... As this unit is somewhere rare, there is a desire to document the unit, and potentially replicate. So, I am wondering if someone has a reader for this IC that either: a) I could borrow for a week or so to read and program a new PAL to verify the read (preferrable) b) I could ship this board to for reading the verification. I'm not worried about the people on option b, but the shipping. I guess if I were near enough to someone, I could just hand deliver it. (I am in IA, so I doubt anyone is local, but I am going to be in Chicago in the Fall, and I will be in Seattle in the next few weeks) Jim -- Jim Brain brain at jbrain.com www.jbrain.com

10 years, 7 months

11/34 in Brooklyn

by stephane.tsacas＠gmail.com

Check it out : http://www.nycresistor.com/2014/05/15/pdp-11/ -- Stephane

10 years, 7 months

VAXStaion RAM Simms Pinout?

by holm＠freibergnet.de

Hi Guys, I have an VAXStation 3100 M76 with 16MB RAM here .. and need more.. I do have some left over RAM Simms from other VAXStations, I Think they fit in 3100 M38 (not sure). That are 4MB Simms, a Sticker says 54-19145-AU Which google says are MS44-AL and I need MS44-AA. Is the Pinout of those RAMs documented somewhere? Can I patch the -AL to -AA ? Regards, Holm -- Technik Service u. Handel Tiffe, www.tsht.de, Holm Tiffe, Freiberger Stra?e 42, 09600 Obersch?na, USt-Id: DE253710583 www.tsht.de, info at tsht.de, Fax +49 3731 74200, Mobil: 0172 8790 741

10 years, 7 months

Buying something from a museum (was Re: Whats in a straight 8 >> +200 years ... That museum bellied up 75 years ago.

by michael.99.thompson＠gmail.com

> From: ard at p850ug1.demon.co.uk (Tony Duell) > Date: Sat, 17 May 2014 19:36:57 +0100 (BST) > Subject: Re: Buying something from a museum (was Re: Whats in a straight 8 >> +200 years ... That museum bellied up 75 years ago. >> > > Alas yes. But then the same thing will happen to private collections, the > owner will have died long before that. > > FWIW, I've disagreed with Mr Donzelli on lots of matters, but I do agree > with him that _everybody_ should make a will. That way, their machines re > hopefully presereved (and I would hope that the chap who receives them > similarly makes a will, and so on). Museums should make a will too. It would be really disappointing to donate something to a museum and later see a landlord put everything in a dumpster (skip) and sell it for scrap. -- Michael Thompson

10 years, 7 months

Whats in a straight 8 PDP-8

by dave.g4ugm＠gmail.com

Folks, Can any one tell me whats in a "PDP-8" Straight 8. So how many logic boards, logic gates, transistors and diodes? Does any one also have the CPU speed. Its just there is one in www.mosi.org.uk next to a Ferranti Pegasus. I would like to be able to compare it with the Pegasus to show how things moved on in the nine years between the two machines. The poor PDP-8 is much neglected as its much smaller and less impressive than the Pegasus, yet I am pretty sure it was faster, cheaper and much more capable. Dave G4UGM

10 years, 7 months

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test-drb May 2014