test-drb February 2021

test-drb@ccmp.vtda.org

113 participants
93 discussions

by aek＠bitsavers.org

I don't have any equipment that uses them any more, so I'll be ebaying off my A-W series flip chips over the next few days. The W's and PT08 boards are up now https://www.ebay.com/itm/184647476832 https://www.ebay.com/itm/184647420812

3 years, 2 months

DEC backplane power connectors

by jnc＠mercury.lcs.mit.edu

> I'm too burned out to look at the engineering drawings and get the part > number to confirm; I'll do that 'soon'. The BA11-K FMPS gives the male shell part numbers as 12-09350-06 and -15; the DD11-C lists the female shell numbers as 12-09351-06 and -15. Those look like they are DEC numbers: https://gunkies.org/wiki/DEC_part_numbers So I'm not sure those are much use. (I'm not going to bother trying to look up what they translate too; we already have the AMP numbers needed to order them; so not much to be gained.) > I took a picture of the male shells, and added it to the CHWiki page > (I'll add the females tomorrow). Done. Noel

3 years, 2 months

NOT "Re: APL\360"

by sieler＠allegro.com

TL;DR: getting tired of separating the wheat from the chaff I have an odd but potentially useful idea for the list server ... Until we have an AI that can properly read a message and re-write the subject line, perhaps the list server would *auto generate* a new subject line after, say, the 29th reply with the same "Re:". After 29 "Re: APL\360", the next such msg would have subject line rewritten to "New topic 1", and the next (up to) 28 "Re: APL\360" would be similarly re-written (the '28' is decremented for every "Re: APL\360" and every "Re: New topic 1"). At that point, the next "Re: APL\360" or next "Re: New topic 1" gets rewritten as "New topic 2". (After a reuse counter for a subject has been 0 for two weeks, it could be reset to 20, to allow much later legitimate replies.) Yeah, tired of getting hopeful seeing "Re: APL\360" and seeing instead a discussion of pints, or endianness (big rules, for a number of reasons ... *even the creator of Intels's memory chip admitted that*), or bit numbering, or counting sheep! :) (And I'm not even complaining about the needless copying of the entire prior post :)

3 years, 2 months

HP Journal back issues

by rsmilward＠frontier.com

You can find HP Journal issues at https://worldradiohistory.com/HP-Journal.htm <https://worldradiohistory.com/HP-Journal.htm> The World Radio History site is a fantastic resource in general, I use it regularly. **Richard

3 years, 2 months

Greaseweazle

by jfoust＠threedee.com

At 04:58 PM 2/1/2021, geneb wrote: >I've got one (F7+ Lightning version) and I've used it with 5.25" and 8" disks. I've got plans to use it with 8" disks, but I've not done it yet. You'll need to get the FDADAP from here: http://www.dbit.com/fdadap.html in order to use it with the GW. Already have one of those. Did you say you have it working with eight inch? - John

3 years, 2 months

cctalk Digest, Vol 76, Issue 29

by mark＠markesystems.com

From: dwight <dkelvey at hotmail.com> > If we'd thought about it we could count to 1023 on our fingers. I used to play string bass in a symphony, and there were many times that there would be long periods of rest, where it was important to count the bars (measures) going by so as to come back in at the right time. To this day (that was 40+ years ago) I can still count quite rapidly up to 31 on one hand (either one). Higher numbers slow me down a bit... Old bass joke: During the last movement of Beethoven's 9th symphony, there is a very long tacit (rest) for the basses. So the bass section all went over to the bar across the street for a drink or three. To keep the conductor from passing by their entry, they put a rubber band around his music. So the situation was... Bottom of the ninth, basses loaded, score tied. (sorry...) ~~ Mark Moulding

3 years, 2 months

Epson QX-10 hard drive

by imp＠bsdimp.com

Greetings I recently purchased a QCS external hard disk on ebay. This was one of the companies that was selling DEC Rainbow hard drives. I had hoped it was an old Rainbow drive with interesting to me bits... Turns out it is an Epson QX-10 hard drive, full of interesting to bits for the QX-10 CP/M enthusiast. I've had trouble finding a suitable community to note this in should there be people around that care... so I thought I'd ask here is people know of good CP/M groups and/or QX-10/16 groups, mailing lists, irc channels, discord servers, etc I could find. Warner

3 years, 2 months

APL\360

by commodorejohn＠gmail.com

> From: Chuck Guzis <cclist at sydex.com> > Numbering of bits in a word is also interesting. Is the high order bit > in a 64 bit word, bit 0 or bit 63? Both conventions have been employed. This one has always boggled me, because it's the one aspect of the Endian Wars where there's a simple, straightforward answer grounded in basic mathematics - base ^ digit-number only gives the correct place-value when the lowest-order bit is numbered zero. It's beyond my ken how anybody thought the reverse was *valid,* let alone a good idea.

3 years, 2 months

Just curious how many Hewlett-Packard Integral computers were sold. We have one here at the SMECC Museum that we are building a display around it for.

by couryhouse＠aol.com

Australian HP museum site... yes kudos to them!? What wonderful work they have done and some of the friendliest? peple around! Even though I pull a copy down from there. If it is,for something we have in the collection? I also try to get original manuals too.. On Sunday, January 31, 2021 Tony Duell <ard.p850ug1 at gmail.com> wrote: On Sun, Jan 31, 2021 at 6:25 AM Frank McConnell via cctalk <cctalk at classiccmp.org> wrote: > > On Jan 30, 2021, at 10:09, ED SHARPE via cctalk <cctalk at classiccmp.org> wrote: > > Hi Doug! No, we do not have a copy of this HP JOURNAL.? We do not have manuals? either.? We,are lucky to have the unit wonder if you can still order ink for the printer. I do have an unopened ink cartrige. You can get scans of the manuals from the Australian HP museum site Do you have any expansion boards in it? Extra memory is very useful (and you can turn any of the boards into a 1MByte one by adding the chips and changing links). As is an RS232 interface (something that IMHO should have been built-in) Do NOT leave the ink cartridge in the machine. The ink is somewhat corrosive and if it leaks onto the flexiprint that connects the cartridge to the logic PCB it will damage it. Due to the layout of the machine the flexiprint is longer than the one in a normal Thinkjet so you can't just raid one of those for spares. Yes there is a way to kludge it with ribbon cable and connectors but it's best not to have the problem in the first place. > > HP 51604A.? I was surprised a few months ago to find that Staples claims to be able to sell new HP cartridges.? Looking earlier today, HP can too! > > Seriously, we?re talking about ink cartridges including replacement print heads for printers manufactured in 1983. I was equally surprised to find that ink ribbons for the Epson HX20 laptop (M160 printer mechanism) along with the ones for the narrower M150 mechanism are still being made. But as I've said before, I'd rather find parts for a machine made 30 years ago than one made 5 years ago. -tony

3 years, 2 months

DEC backplane power connectors

by jnc＠mercury.lcs.mit.edu

> I have posted it here: Ooops, moved it; now here: http://ana-3.lcs.mit.edu/~jnc/tech/pdp11/jpg/dec_connectors.jpg Noel

3 years, 2 months

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test-drb February 2021