You beat me! You got one hit. How did you search for that? I come up dry... Marc -----Original Message----- From: cctalk [mailto:cctalk-bounces at classiccmp.org] On Behalf Of Pete Lancashire Sent: Wednesday, June 15, 2016 8:50 PM To: General Discussion: On-Topic and Off-Topic Posts Subject: Re: Mystery HP 1000 board Well there are 20 bits of ALU .... And this guy has one and some other boards http://nevadabarry.com/electron.html#HP%20Test%20Equipment NO Connection with the site/person/etc .. just passing it on On Wed, Jun 15, 2016 at 8:00 PM, Jay West <jwest at classiccmp.org> wrote:

Ah, thanks, this is getting awfully close, and jives well with Jay's recollection. Low frequency spectrum analysis using FFT seems to be the application indeed. Mentions an "arithmetic booster board" bolted to the bottom of an HP 21MX K (whatever a K-model is, never heard of it, but seems to be made of an HP 2105 model, I'll look that up) to improve FFT performance. They call the combo a "5443A" processor. That's dangerously similar to my 54427 board numbering and "booster" naming and fits right in with the 74S181 bit slice 20-bit ALU. I haven't found the particular system that would use an E-series computer, but I'll keep looking in this direction. Marc -----Original Message----- From: cctalk [mailto:cctalk-bounces at classiccmp.org] On Behalf Of Paul Birkel Sent: Wednesday, June 15, 2016 10:44 PM To: 'General Discussion: On-Topic and Off-Topic Posts' Subject: RE: Mystery HP 1000 board See: http://www.hpl.hp.com/hpjournal/pdfs/IssuePDFs/1977-10.pdf Figure 4 Shows some of those other parts as well in the block diagram. Uses a "HP 21MX K-Series Computer". Model 5420A Digital Signal Analyzer. -----Original Message----- From: cctalk [mailto:cctalk-bounces at classiccmp.org] On Behalf Of CuriousMarc Sent: Thursday, June 16, 2016 1:16 AM To: 'General Discussion: On-Topic and Off-Topic Posts' Subject: RE: Mystery HP 1000 board You beat me! You got one hit. How did you search for that? I come up dry... Marc -----Original Message----- From: cctalk [mailto:cctalk-bounces at classiccmp.org] On Behalf Of Pete Lancashire Sent: Wednesday, June 15, 2016 8:50 PM To: General Discussion: On-Topic and Off-Topic Posts Subject: Re: Mystery HP 1000 board Well there are 20 bits of ALU .... And this guy has one and some other boards http://nevadabarry.com/electron.html#HP%20Test%20Equipment HP 5443 05443-60047 05443-60042 05443-60031 MIOB Interface 05443-60050 Booster Microcode 05443-60057 C (13803F?) 05443-60071 A (22803F) NO Connection with the site/person/etc .. just passing it on On Wed, Jun 15, 2016 at 8:00 PM, Jay West <jwest at classiccmp.org> wrote:

Apparently the 21MX-K is an HP 2105 sold as board kit without a chassis and power supply. Motherboard, firmware board, short risers, and front panel. So you can stick your own embedded computer in your project, add your own specialized boards (and keyboard!).The Arduino controller of the time (but 16 bits!). Marc Sent from my iPad

Well what the heck, found it, we have one right here in the CHM collection!!! It's part of an HP 5451C Fourier Analysis system, and there are quite a few other bits needed besides the HP-1000 and its many weird cards! I think I saw them from the guy that I bought the HP 1000 from. I might go back. http://www.computerhistory.org/collections/catalog/102692715 A later revision of the 5451A system I had found below with the nice lady picture. Marc -----Original Message----- From: CuriousMarc [mailto:curiousmarc3 at gmail.com] Sent: Wednesday, June 15, 2016 11:54 PM To: 'General Discussion: On-Topic and Off-Topic Posts' Cc: 'Marc Verdiell' Subject: RE: Mystery HP 1000 board Suspicion confirmed, inspecting other cards of the machine, the cage is full of many mystery interface cards 05451-20025. I'm not sure yet of what the many cards do, but The HP 5451 was a 1972 Fourrier Analysis system that was implemented with an even earlier, core memory version HP 2100 processor. I recommend the picture of the system below, that's one of the best pictures of an 2100 system I have ever seen ;-) http://spherik.tumblr.com/post/98803997123/hewlett-packard-hp-5451a-fourier… Wait. They even made an earlier 1970 model based on a HP 2116 (HP's first computer!) documented here, www.hpl.hp.com/hpjournal/pdfs/IssuePDFs/1970-06.pdf Also used for low frequency spectrum analysis, here for sound and vibration. I suspect my machine is a descendent of these early systems, haven't quite put my finger exactly on it, but getting really close. Marc -----Original Message----- From: CuriousMarc [mailto:curiousmarc3 at gmail.com] Sent: Wednesday, June 15, 2016 11:07 PM To: 'General Discussion: On-Topic and Off-Topic Posts' Cc: 'Marc Verdiell' Subject: RE: Mystery HP 1000 board Ah, thanks, this is getting awfully close, and jives well with Jay's recollection. Low frequency spectrum analysis using FFT seems to be the application indeed. Mentions an "arithmetic booster board" bolted to the bottom of an HP 21MX K (whatever a K-model is, never heard of it, but seems to be made of an HP 2105 model, I'll look that up) to improve FFT performance. They call the combo a "5443A" processor. That's dangerously similar to my 54427 board numbering and "booster" naming and fits right in with the 74S181 bit slice 20-bit ALU. I haven't found the particular system that would use an E-series computer, but I'll keep looking in this direction. Marc -----Original Message----- From: cctalk [mailto:cctalk-bounces at classiccmp.org] On Behalf Of Paul Birkel Sent: Wednesday, June 15, 2016 10:44 PM To: 'General Discussion: On-Topic and Off-Topic Posts' Subject: RE: Mystery HP 1000 board See: http://www.hpl.hp.com/hpjournal/pdfs/IssuePDFs/1977-10.pdf Figure 4 Shows some of those other parts as well in the block diagram. Uses a "HP 21MX K-Series Computer". Model 5420A Digital Signal Analyzer. -----Original Message----- From: cctalk [mailto:cctalk-bounces at classiccmp.org] On Behalf Of CuriousMarc Sent: Thursday, June 16, 2016 1:16 AM To: 'General Discussion: On-Topic and Off-Topic Posts' Subject: RE: Mystery HP 1000 board You beat me! You got one hit. How did you search for that? I come up dry... Marc -----Original Message----- From: cctalk [mailto:cctalk-bounces at classiccmp.org] On Behalf Of Pete Lancashire Sent: Wednesday, June 15, 2016 8:50 PM To: General Discussion: On-Topic and Off-Topic Posts Subject: Re: Mystery HP 1000 board Well there are 20 bits of ALU .... And this guy has one and some other boards http://nevadabarry.com/electron.html#HP%20Test%20Equipment HP 5443 05443-60047 05443-60042 05443-60031 MIOB Interface 05443-60050 Booster Microcode 05443-60057 C (13803F?) 05443-60071 A (22803F) NO Connection with the site/person/etc .. just passing it on On Wed, Jun 15, 2016 at 8:00 PM, Jay West <jwest at classiccmp.org> wrote:

What I forgot, if anyone has tapes or info of these systems I would be very interested. Tapes are dc100 type of tape cartridges, typically starting with HP 05423-##### or HP 05420-###### And have titles like HP 5420A/B, HP 5423, Control- Test- or HPIB-tape etc.. I've one working set of software and love to find more. -Rik

Marc wrote... ----- It's part of an HP 5451C Fourier Analysis system ----- So my foggy memory of it being a card to make the system a fourier analysis instrument was "not too far off" *grin*. Now if I could just remember when wife asks me to bring home bread from the store.... Marc gave me new knowledge the other day, I'll share in case no one knew this....I sure didn't. Marc showed me a machine that was badged "1000F", but had no FP box under it. I of course (incorrectly) told him - it ain't an F unless you go back and get the FP box that goes with. He found that in the rear above the I/O cage, there was a wide (width of the chassis) card cage of about 3 slots, that was apparently for an FP. My reply (wrong) was that it must be a custom job. Turns out - there was a model of F designated 2111F which has the FP boards inside the main chassis above the I/O cage, and the 2117F which has the boards in a separate box under the cpu. Either I never knew about this 2111F, or my brain blocked it out or forgot it. I'm going with the former ;) J

Glen wrote ---- Figures 1-2 and 1-3 show the difference between the 2111F and 2117F and how the two FPP Arithmetic and Control PCAs fit into the top of the 2111F instead of into a separate box below the 2117F. ---- Yeah, I checked my M/E/F red handbook that I keep next to the system console and have read thoroughly for years, and sure enough it mentions the 2111F as well. Which means it's not that I never knew it... unfortunately - it means I forgot it. What's going to go next.... oh no. lol J

Al, Yes please! I was looking all over for that so I can try to pick up the right pieces from the seller. Hurry (or maybe I can come around and take a peek?). Marc

I the HP -> Agilent -> Keysight world when you see part numbers start with a 0 (zero) in many cases the instrument they were for or in this case part of, is the digits that follow. Not in all cases, this falls apart for things that were common between instruments or the item was already had been used. Card extenders are a good example, there are common extenders that fall under the tools area, and follow a p/n that is just sequential. But it a good initial strings to go look for. If Google does not come up with anything try Keysight. If someone is serious about restoring the whole FFT rack, let me know I ended up with about 75% of one. I acquired it for the CRT which is used in other instruments, one of which I own. -pete On Wed, Jun 15, 2016 at 10:44 PM, Paul Birkel <pbirkel at gmail.com> wrote:

Many thanks Tony, I didn't know about the "model number of the first instrument that used the assembly minus the zeroes", this explains a lot of things! Marc

Yes, yes, I remember! [furiously searches email archive] Jay said: "The large board on the left. I am fairly sure that I have one. I am trying to remember what it was. I know that it made the E series into specific test instrument. I do remember that you can remove it and it's a normal E. I'll go see if I can find any notes I made on it. I seem to recall it made the E cpu into a dedicated fourier analysis machine or something.." At the time I didn't even have the card info or number. But nothing came out of my google-ing. Is that the board you were thinking of? Did you ever find any more documentation on it? Do you know which software/hardware this works with? Anyone else knows? Marc -----Original Message----- From: cctalk [mailto:cctalk-bounces at classiccmp.org] On Behalf Of Jay West Sent: Wednesday, June 15, 2016 8:01 PM To: 'General Discussion: On-Topic and Off-Topic Posts' Subject: RE: Mystery HP 1000 board I have one of those boards. You sent me an email about it and I replied a week ago :) -----Original Message----- From: cctalk [mailto:cctalk-bounces at classiccmp.org] On Behalf Of CuriousMarc Sent: Wednesday, June 15, 2016 9:49 PM To: cctalk at classiccmp.org Subject: Mystery HP 1000 board Can anyone identify this HP board (see link to pictures)? https://goo.gl/photos/BBuAV1oozWNSqeUTA It was at under the main board of a newly acquired HP 1000-E, next to the firmware board. It says HP 54427-60050 Booster Microcode. It has 5 bitslice SN 74S181 chips at the back. So I surmise maybe it's a late ALU booster upgrade? Marc