> -----Original Message----- > From: cctech [mailto:cctech-boun...@classiccmp.org] On Behalf Of Mike Ross > Sent: 28 May 2016 11:29 > To: General Discussion: On-Topic Posts <cct...@classiccmp.org> > Subject: Re: Mystery IBM processor > > On May 28, 2016 9:51 PM, <malc...@avitech.com.au> wrote: > > > > Just wondering if anyone can help us to identify a rather large IBM > > processor assembly. It weighs around 60 pounds. > > > > The frame has a P/N of 34F5089. The frame houses 9 modules, 6 of which > > are installed. The module we removed for inspection has a P/N of 34F0615. > > Definitely IBM mainframe. The individual square alloy lumps are what are > called MCMs - Multi Chip Modules. Insides are dozens of individual ECL ICs. > Water cooling heatsinks would have been bolted to the front side in life. > Can't remember what IBM called the entire assembly. 1980s, probably a 3080 > or 3090 but don't quote me on that.
I believe the modules are called TCM's or Thermal Conduction Modules. It looks like a 3090 chip but I thought those were withdrawn before the date code of "90xx". I thought the ES/9000 follow on had a re-designed chip with multiple rows of pins like this... http://www.ebay.com/itm/Rare-IBM-9121-TCM-Thermal-Conduction-Module-ES-9000-Mainframe-Microprocessor-/182138577581 but when I look at the IBM web pages:- http://www-03.ibm.com/ibm/history/exhibits/mainframe/mainframe_PP9000.html it says only the high end machines have the new TCM so I think it may be a TCM from an entry level ES/9000 machine... > > Mike Dave G4UGM
