PDP-10 was 36-bit. You’re thinking of the PDP-1, 4, 7, 9 and 15 line of computers.
However, it’s not actually 18-bit, but 2 8-bit bytes with parity for each byte. If it is indeed an early Intel memory addon for minicomputers, i’d expect it to be for the 16-bit DG Nova or PDP-11 line of machines. > On Jun 15, 2020, at 10:09 AM, Dave Wade via cctalk <cctalk@classiccmp.org> > wrote: > >> >> -----Original Message----- >> From: cctalk <cctalk-boun...@classiccmp.org >> <mailto:cctalk-boun...@classiccmp.org>> On Behalf Of Chuck Guzis via >> cctalk >> Sent: 15 June 2020 06:33 >> To: dwight via cctalk <cctalk@classiccmp.org <mailto:cctalk@classiccmp.org>> >> Subject: Re: Unknown Intel blinkenlight panel circa 1973 >> >> On 6/14/20 8:41 PM, dwight via cctalk wrote: >>> I can see why I was having problems. The picture was upside down. It >>> looked like Spanish or something. Do remember that Intel's claim to >>> fame wasn't just micro processor. They were one of the first to do MOS >>> RAMs for big machines. They were more into solid state memory systems >>> than uPs, until after the 8080. It clearly isn't for some >>> 4004 or 8008. It was likely monitoring some RAM for some mini. >> >> Intel Memory Systems Division was largely responsible for saving Intel's >> bacon in the early 1970s. The MPU business with the 8008 and 4004 wasn't > a >> moneymaker initially. >> >> However, selling DRAM assemblies for various minis (e.g. DG and DEC) as >> well as S/370 add-on memory amounted to a large portion of their early >> sales. IMSD was on the far end of Mathilda in Sunnyvale. >> > > I found this ad here:- > > https://books.google.co.uk/books?id=9Ih5WQ-muXEC&pg=PT1&lpg=PT1&dq=ibm/370+t > <https://books.google.co.uk/books?id=9Ih5WQ-muXEC&pg=PT1&lpg=PT1&dq=ibm/370+t> > hird+party+memory+intel > > I think if we could read the legends on the front we might get a better idea > of what system it was for... > ... looks like 18-bits so something in the pdp-10 line? > > Dave > > >> Have a look at section 7 here: >> >> https://johncargin.files.wordpress.com/2013/12/intel-catalog-1973.pdf >> <https://johncargin.files.wordpress.com/2013/12/intel-catalog-1973.pdf> >> >> --Chuck
