DisplayWriter apparently on Craigslist...

http://www.vcfed.org/forum/showthread.php?55404-IBM-Displaywriter Dave Wade G4UGM & EA7KAE

Re: An interesting use of the 4004 instructions

> On Dec 15, 2016, at 2:52 PM, dwight wrote: > > I was looking at some disassembled 4004 code when I came across > > a SKIP operation. > > It isn't normally an instruction but If you do a JCN with all the = 0, > > it will do a NEVER jump. > > This is the equivalent of a SKIP instruction

Mystery 8085-related IC identification needed please

Hi folks, I have an 8085-based viewdata telephone system on the bench that's proving to be a labour of love in trying to get it running with zero documentation - there are only 6 known examples that I've come across and all but 2 of them are in museums, none known to work. If any of you fancy sear

Re: DisplayWriter apparently on Craigslist...

hopefully, someone can pick these up it doesn't look like there is any software with it. would be nice to get images if there is any software with it if someone gets it, and tries to use the disk images on bitsavers, you will need to bulk erase the floppy you copy the diagnostic disk to since it

Re: An interesting use of the 4004 instructions

The 4004 destroys the ACC on return from subroutine calls and one would have to use hard coded values to pass a value back so it is common to the use carry flag in a similar way to pass a status back. Since this the address part of the JCN instruction doesn't matter if it never does the branch

Anyone want an RK11-C manual?

As I finish going through the mounds of paper I've recently aquired, I now have a extra (duplicate) copy of the RK11-C manual (in the format of the early 11/20 manuals, i.e. 11"x17" sheets). Is anyone here qinterested in having it? Preferably somehow who actually has an RK11-C - I know there's at

RE: Anyone want an RK11-C manual?

Van: Noel Chiappa Verzonden: vrijdag 16 december 2016 17:08 Aan: cctalk@classiccmp.org CC: j...@mercury.lcs.mit.edu Onderwerp: Anyone want an RK11-C manual? As I finish going through the mounds of pap

Re: PDP-6s at MIT

> From: Lars Brinkhoff > I wonder how the AI PDP-6 was used back in the day. I suppose ITS > development moved to the KA10 using the virtual memory pager, leaving > the 6 behind. But it was still attached as a slave CPU, right? Yes. There is a document, "February 1972 ITS Status

Re: Anyone want an RK11-C manual?

> Is anyone here qinterested in having it? Preferably somehow who actually has > an RK11-C - I know there's at least one person on CCTalk who has one. Hi Noel — I have an RK11-C (and two RK05s) that I am just about to dive in on. I would appreciate this document, unless it is needed for scanning

Re: Anyone want an RK11-C manual?

On Fri, Dec 16, 2016 at 4:31 PM, Henk Gooijen wrote: > > > Van: Noel Chiappa > Verzonden: vrijdag 16 december 2016 17:08 > Aan: cctalk@classiccmp.org > CC: j...@mercury.lcs.mit.edu > Onderwerp: Anyone w

Re: Mystery 8085-related IC identification needed please

From: Adrian Graham: Friday, December 16, 2016 5:43 AM They aren't 'standard' 14-pin DIPs in that they don't follow the GND-on-pin-7-Vcc-on-pin-14 layout. Pins 6 and 7 on both are wired together (not to GND) and form the RESET signal for the 8085 via the 7414 at 10A, source for this signal is unk

Re: Mystery 8085-related IC identification needed please

> > They aren't 'standard' 14-pin DIPs in that they don't follow the > GND-on-pin-7-Vcc-on-pin-14 layout. Pins 6 and 7 on both are wired together > (not to GND) and form the RESET signal for the 8085 via the 7414 at 10A, > source for this signal is unknown currently. Pin 5 on both appears to be Vcc

Re: Mystery 8085-related IC identification needed please

On Fri, Dec 16, 2016 at 6:19 PM, Peter Coghlan wrote: >> >> They aren't 'standard' 14-pin DIPs in that they don't follow the >> GND-on-pin-7-Vcc-on-pin-14 layout. Pins 6 and 7 on both are wired together >> (not to GND) and form the RESET signal for the 8085 via the 7414 at 10A, >> source for this

Rack-mounting a TU56

I have been given an H960 rack :-). I intend to use it for my PDP8/e system (currently piled up, not connected), which consists of the : PDP8/e processor, Full of cards, memory extension, EAE, 32KW core, boot diode matrix ROM, RK8e, RD8e, RX8e, PC8e, etc. PC04 paper tape punch/reader (acutally, I

Re: Rack-mounting a TU56

David Gesswein https://www.pdp8.net/8eperiph.shtml On Fri, Dec 16, 2016 at 1:35 PM, Tony Duell wrote: > I have been given an H960 rack :-). I intend to use it for my PDP8/e system > (currently piled up, not connected), which consists of the : > > PDP8/e processor, Full of cards, memory extension

Re: Mystery 8085-related IC identification needed please

If one of the 749X parts, one should be able to figure it out by looking at the NC pins. The different chips look to have different NC pins. If something is connected to one for one of them, it would most likely be one of the others. Dwight From: cctalk on be

RE: Rack-mounting a TU56

Tony wrote... > Anyway, does anyone have experience of rack-mounting a TU56? It > clearly doesn't go on slide rails, it bolts directly to the rack > (hinge down the front panel for access). I have the manuals from > Bitsavers, they imply there is some kind of spacer block that goes > under the

Re: Rack-mounting a TU56

Speaking of which - I'll put out a call again for if anyone wants to get a group purchase on the motor run caps for a TU55/56 Count me in Jos

Re: Rack-mounting a TU56

On Fri, Dec 16, 2016 at 7:12 PM, Jay West wrote: > Tony wrote... >> Anyway, does anyone have experience of rack-mounting a TU56? It >> clearly doesn't go on slide rails, it bolts directly to the rack >> (hinge down the front panel for access). I have the manuals from >> Bitsavers, they imply there

Re: Rack-mounting a TU56

On Fri, Dec 16, 2016 at 2:12 PM, Jay West wrote: > Speaking of which - I'll put out a call again for if anyone wants to get a > group purchase on the motor run caps for a TU55/56 I need a few. -ethan

Re: Rack-mounting a TU56

On Fri, Dec 16, 2016 at 2:18 PM, Tony Duell wrote: > On Fri, Dec 16, 2016 at 7:12 PM, Jay West wrote: >> Tony wrote... >>> Anyway, does anyone have experience of rack-mounting a TU56? >> >> I can tell you - be careful about putting it all the way at the top. The >> front deck can't tilt >> downw

RE: Rack-mounting a TU56

Van: Ethan Dicks Verzonden: vrijdag 16 december 2016 20:43 Aan: General Discussion: On-Topic and Off-Topic Posts Onderwerp: Re: Rack-mounting a TU56 On Fri, Dec 16, 2016 at 2:12 PM, Jay West wrote: > Speaking of which - I'll put out

RE: Rack-mounting a TU56

Ok I just double-checked my 8E racks, and it refreshed my memory. The support bracket is not necessary. I believe that it provided no benefit after the TU56 was mounted... it was merely present in order to make it even possible for one person to bolt the tu56 to the uprights. It is a non-trivial

Re: Rack-mounting a TU56

From: Jay West: Friday, December 16, 2016 11:12 AM Speaking of which - I'll put out a call again for if anyone wants to get a group purchase on the motor run caps for a TU55/56 I have a couple of spares, IIRC, but since I also have a couple of TU55, a couple of TU56, and a TU56H, I'd like t

Re: Rack-mounting a TU56

On Fri, Dec 16, 2016 at 8:05 PM, Jay West wrote: > Ok I just double-checked my 8E racks, and it refreshed my memory. > > The support bracket is not necessary. I believe that it provided no benefit > after the TU56 > was mounted... it was merely present in order to make it even possible for > one

RE: heavy stuff -- was: Anyone want an RK11-C manual?

Van: Tony Duell Verzonden: vrijdag 16 december 2016 17:54 Aan: General Discussion: On-Topic and Off-Topic Posts Onderwerp: Re: Anyone want an RK11-C manual? On Fri, Dec 16, 2016 at 4:31 PM, Henk Gooijen wrote: > > But I am not giving

Re: Rack-mounting a TU56

On Fri, Dec 16, 2016 at 01:12:45PM -0600, Jay West wrote: > > Speaking of which - I'll put out a call again for if anyone wants to get > a group purchase on the motor run caps for a TU55/56 > Are these the big honking cans that have grown a nice little crystal structure near one connector?

Re: Rack-mounting a TU56

I replaced my motor caps with some that I found on Alibaba (or maybe Aliexpress) a couple of years ago. They are the right diameter and height and have wire leads instead of lugs. They're also made with yummy vegatable oil and seem to work just fine (no big loud bangs yet). Marc On Fri, Dec 16,

HP 9875A usable for interchange with 85 or 9825?

I’m working on getting my 9875A dual DC100A tape drive operational, but have come across a strange issue. This 9875A seems to have the reversed sense of on which reel the rewind places the tape as compared to my 85B and 9825T (which agree is the left hand one as viewed when inserting the tape i

Re: Found in data center

Hello, If I can get the stuff (They would not let me have the mainframe) I'll let you know. No problem shipping since I doubt anything is fragile. -pete On Thu, Dec 15, 2016 at 10:20 AM, Guy Sotomayor Jr wrote: > If no one else wants/claims this, I will as it looks like mainframe stuff. > > Wi

Re: Mystery 8085-related IC identification needed please

On 12/16/2016 08:43 AM, Adrian Graham wrote: > Hi folks, > > I have an 8085-based viewdata telephone system on the bench that's proving > to be a labour of love in trying to get it running with zero documentation - > there are only 6 known examples that I've come across and all but 2 of them > are

Re: heavy stuff -- was: Anyone want an RK11-C manual?

On Fri, Dec 16, 2016 at 8:23 PM, Henk Gooijen wrote: > > Grin … I don’t plan to check whether Mother Earth’s acceleration is still > working fine. > Indeed, the RA60 is heavy. Just like RA81’s, the RA60 is not good for your > back, but > the RA60 is worse than the RA81. The RA60 is also “longe

Re: Rack-mounting a TU56

On Fri, Dec 16, 2016 at 3:05 PM, Jay West wrote: > Ok I just double-checked my 8E racks, and it refreshed my memory. > > The support bracket is not necessary... > > All this occurred in the short version of the H960 (I forget... H962? The one > with the sloped front). H967 http://web.aanet.com.

RE: Rack-mounting a TU56

Van: Jay West Verzonden: vrijdag 16 december 2016 21:05 Aan: 'General Discussion: On-Topic and Off-Topic Posts' Onderwerp: RE: Rack-mounting a TU56 Ok I just double-checked my 8E racks, and it refreshed my memory. The support bracket

Re: Found in data center

Contact me off-list (g...@shiresoft.com) for shipping information. Thanks. TTFN - Guy > On Dec 16, 2016, at 9:35 AM, Pete Lancashire wrote: > > Hello, > > If I can get the stuff (They would not let me have the mainframe) I'll let > you know. No problem shipping since I doubt anything is fragi

Re: heavy stuff -- was: Anyone want an RK11-C manual?

> From: Henk Gooijen > I really do not want to mess with the mechanical construction of the > entire RP03 drive. ... I want to move them "as is". Well, don't forget, you're probably going to want to go through them thoroughly before you try and use them, and you might do a fair amoun

A Healthy Haul for the Holidays? Tuscon, AZ

Spotted on Craigslist, no prices known, no relation to seller, but some nice items: https://tucson.craigslist.org/sys/5846658097.html Highlights (IMO): 3B2/400, Xerox Star, HP6000/300, Televideo 910 and lots of micro and workstation stuff besides. -j

RE: Rack-mounting a TU56

I had written > Being a stickler for authenticity, I was looking for that support bracket but > never did find one. > So... I wound up using one of those horizontal bars/plates that were > commonly (DEC provided) mounted above and below a stack of lead > counterweights, as it's mechanically

Re: heavy stuff -- was: Anyone want an RK11-C manual?

> On Dec 16, 2016, at 4:43 PM, Noel Chiappa wrote: > >> From: Henk Gooijen > >> I really do not want to mess with the mechanical construction of the >> entire RP03 drive. ... I want to move them "as is". > > Well, don't forget, you're probably going to want to go through them > thoroughly bef

ISO: RL02 cable

Hi all -- I'm in need of an RL02 cable (drive to drive). I picked up a second drive for my PDP-11/40 and I'd like to get it hooked up. Thanks as always, Josh

Re: heavy stuff -- was: Anyone want an RK11-C manual?

On Sat, Dec 17, 2016 at 1:28 AM, Paul Koning wrote: > >> On Dec 16, 2016, at 4:43 PM, Noel Chiappa wrote: >> >>> From: Henk Gooijen >> >>> I really do not want to mess with the mechanical construction of the >>> entire RP03 drive. ... I want to move them "as is". >> >> Well, don't forget, you're

Re: ISO: RL02 cable

On Sat, Dec 17, 2016 at 12:32 AM, Josh Dersch wrote: > Hi all -- > > I'm in need of an RL02 cable (drive to drive). I picked up a second drive > for my PDP-11/40 and I'd like to get it hooked up. > > Thanks as always, > > Josh > > I don't have a spare, but just to follow up on our earlier conver