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6a6ar09a
Joined: 14 Oct 2009
Posts: 444
Location: Belgrade
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 Posted: Wed Aug 24, 2011 12:29 pm Post subject: Forgotten jewel |
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Hi guys, finally I have some time for myself (and chips). I want to thank you for your patience with me last couple of weeks and I promise it will be no more delays (regarding previously sold chips).
 As a kind of apologies, I will share with you my last find and I hope you will like it.
So, what is "Forgotten jewel"? 
Well, here we go;
- I didn't even know about MM5700 until few days ago. How many of you know about this chip? (reason for this can be found here; (first sentence) http://computermuseum.informatik.uni-stuttgart.de/dev_en/christiani/christiani_d.html )
- I can not find them in any other collection, museum etc
- Even here, at CPU-World, it is barely mentioned. chip68 have sold NS '72 data-book http://www.cpu-world.com/forum/viewtopic.php?t=10151&highlight=mm5700 and just mentioned it. No pictures, no any specifications, nothing... (chip68 or debs3759 could help if they still have this data book. I would be grateful.)
- Google gave me almost nothing except one website, Stuttgart university ; http://computermuseum.informatik.uni-stuttgart.de/dev_en/christiani/christiani_d.html and there I have found some minor information.
- I have found some traces that lead to one document that also (I believe) have more info about MM5700, but this document is available just for IEEE members thru IEEE Xplore (please, can anyone help me to get this document: "MOS/LSI launches the low-cost processor" writen by G Lapidus - 1972 ?)
Finally, here are some pictures. Here you can see the whole chipset too. (pretty similar like my MCS-4 board)
Pay attention on date-code.
What do you guys think? Jewels or not?
The whole chipset looks like this:
MM5700CA/D
MM5701CA/D
MM5701CB/D
MM5702CA/D
MM5703CA/D
MM5703CB/D
MM5703CC/D
MM5704CB/D
(more pictures will be available at my website as soon as I find some time and more info about this chip)
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kosmokrator
Joined: 03 Jul 2008
Posts: 4085
Location: Athens-GR
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| Posted: Wed Aug 24, 2011 12:41 pm Post subject: |
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MM5704 Keyboard Interface by N/S
the only thing i find.... is just a reference on some datasheet about this..... no actual datasheet...
but i think isnt right...
where u find the board may help us 100%!!!! |
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6a6ar09a
Joined: 14 Oct 2009
Posts: 444
Location: Belgrade
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| Posted: Wed Aug 24, 2011 12:52 pm Post subject: |
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| kosmokrator wrote: | MM5704 Keyboard Interface by N/S
the only thing i find.... is just a reference on some datasheet about this..... no actual datasheet...
but i think isnt right...
where u find the board may help us 100%!!!! |
This time I didn't found it in machine. Just board laying on the ground at scrap jard 
It probably belongs to some desktop calculator (there was a lot of them around, broken...) but I can not tell that for sure.
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kosmokrator
Joined: 03 Jul 2008
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Location: Athens-GR
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| Posted: Wed Aug 24, 2011 12:58 pm Post subject: |
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| but ..for suree its a nice and early board...I like it |
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6a6ar09a
Joined: 14 Oct 2009
Posts: 444
Location: Belgrade
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| Posted: Wed Aug 24, 2011 1:46 pm Post subject: |
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| kosmokrator wrote: | | but ..for suree its a nice and early board...I like it |
Yes, thank you Kosmo. The thing that is amazing (for me) is that we have here CPU which is not listed almost anywhere... Not even here. Just like it was not existed. Maybe I am too much exited but, if we have here CPU from '71 and if it is not listed on any relevant website on the web... it looks like we have here a bit more than just nice board.
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kosmokrator
Joined: 03 Jul 2008
Posts: 4085
Location: Athens-GR
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| Posted: Wed Aug 24, 2011 1:56 pm Post subject: |
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imo is not cpu....or cpu set.....
maybe a calculator chip-set or just some ttl ....not a real programmable cpu ect...like 4004 stuff....
i hope some other member will have a closer idea what is this stuff.... |
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6a6ar09a
Joined: 14 Oct 2009
Posts: 444
Location: Belgrade
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| Posted: Wed Aug 24, 2011 2:17 pm Post subject: |
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| kosmokrator wrote: | imo is not cpu....or cpu set.....
maybe a calculator chip-set or just some ttl ....not a real programmable cpu ect...like 4004 stuff....
i hope some other member will have a closer idea what is this stuff.... |
Well,
- the guys (whu I dont know, from stuttgart university) have sad it is "microprocessors, for example the MM 5700 belonged to, a bit-serial, desktop-computer orientated Harvard architecture".
- I think i have found yestrday that MM5701 is shift register.
- chip68 (I respect his knowledge very much) have sad "pre-IMP CPU"
... so, I am pretty sure it is not calculator chip-set or just some ttl.
If we have lacky and if chip68 or debs3759 see this, we will know for sure.
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kosmokrator
Joined: 03 Jul 2008
Posts: 4085
Location: Athens-GR
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| Posted: Wed Aug 24, 2011 2:37 pm Post subject: |
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| lets..see...... interesting |
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johnorun
Joined: 04 Apr 2008
Posts: 3364
Location: Chicago, IL- US
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| Posted: Wed Aug 24, 2011 6:59 pm Post subject: |
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While we are waiting for information, are there any plans to have the November "CPU show" in Belgrade that you mentioned earlier this year? 
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hugo929
Joined: 27 Oct 2006
Posts: 6163
Location: China
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| Posted: Wed Aug 24, 2011 7:46 pm Post subject: |
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very nice find! my friend. probably not as worth as a MCS-4 set, but much rarer than it! congratulations!
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doccybrown
Joined: 03 Oct 2005
Posts: 1736
Location: Germany
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| Posted: Wed Aug 24, 2011 8:00 pm Post subject: |
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Awesome find Dragan! 
The IEEE-Xplore says the MM5700 is a 4bit arithmetic unit and
the MM5701's are register units / shift register!
MM5702 static switches
MM5705 and 5703 RAM and ROM
MM5704 keyboard interface
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doccybrown
Joined: 03 Oct 2005
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Location: Germany
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| Posted: Wed Aug 24, 2011 8:04 pm Post subject: |
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Am I right that the datecode on the chips indicates 1971?
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Neon_WA
Joined: 08 Nov 2008
Posts: 7146
Location: Margaret River, West Australia
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| Posted: Wed Aug 24, 2011 8:07 pm Post subject: |
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all i can find on NS timeline of processors produced is this
1973 16-bit chipset IMP-16
1974 8-bit chipset IMP-8
1975 16-bit single chip PACE
so these seem to pre-date their time-line
off on a tangent, came across this
| Quote: | | In 1968 Garrett was invited to produce a digital computer to compete with electromechanical systems then under development for the main flight control computer in the US Navy's new F-14 Tomcat fighter. The design was complete by 1970, and used a MOS-based chipset as the core CPU. The design was smaller and much more reliable than the mechanical systems it competed against, and was used in all of the early Tomcat models. However the system was considered so advanced that the Navy refused to allow publication of the design, and continued to refuse until 1997. For this reason the CADC, and the MP944 chipset it used, are fairly unknown even today. |
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gshv
Joined: 01 Feb 2003
Posts: 7898
Location: Fairfax, VA USA
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| Posted: Wed Aug 24, 2011 9:57 pm Post subject: |
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I don't have datasheets for MM5700 and other early chips. I have information on other devices from MM5700-series, and all those are calculator chips. For example, MM5734 is a 8-function calculator with memory, MM5758 is a scientific calculator, MM5760 is a slide-rule calculator. They are single-chip calculators, and I suspect that earlier MM5700 devices were multi-chip calculators.
Edit Correction. I suspect the chip was designed as a milti-chip calculator, but, perhaps, the chip could be used for much more than a calculator. Just like Intel 4004.
Gennadiy |
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kosmokrator
Joined: 03 Jul 2008
Posts: 4085
Location: Athens-GR
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| Posted: Thu Aug 25, 2011 3:04 am Post subject: |
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lol.... At least i find the one was correct
MM5704 Keyboard Interface by N/S
Many good Info Doccy And Genna
Nice find Drag  |
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