At 07:49 PM 5/26/04 -0800, you wrote: >At 2004-05-26 21:54, Joe R. wrote: >> That would be my first guess but I don't recall ever seeing that number >>before and I can't find it on the net. > >The 8254 is a peripheral chip for a microprocessor. >Did you locate one?
Yes, the card that the WD1510s are on is a double height DEC wirewrap prototyping card and has a handwritten label that says "CCA Camera I/F". That's "Circuit Card Assembly, Camera InterFace" for the ones of you that understand militay jargon. It was in a small DEC chassis and there was a DEC PDP-11/73 CPU card (M8192YB) in the same chassis. The whole thing was a controller for a black body radiation source. These sources are machines that can produce black body radiation at VERY precise temperatures (above or below ambiant). They're used to test FLIRs and the like. > >Are there other peripheral chips for that microprocessor? Yes, four 4 port COMM cards (four DEC M8043s), a DILOG MFM disk controller and one other prototyping card that says that it was a motor controller card. I found more cards but they were out of the system and may or may not have been part of this system. > >Can it be that the WD-chips were engineering samples >that never made it into regular production? I don't know but theres'no markings to indicate that they're samples or prototypes. Where did >you find the boards? In a PILE of surplus equipment that was being scrapped for the metal content. > >What are the connectors on the board like? Besides the two standard DEC card edge connectors there are three SMC connectors and three ribbon cable headers. One is 10 pin, one is 50 pin and the other is 34 pin. > >... > >The more info you provide the more people can help you. > >Greetings, >Jaap > > >>At 10:19 AM 5/26/04 -0800, you wrote: >>>Sounds like a disk controller IC to me. >>> >>>Fred Townsend >>> >>> >>> >>>Joe R. wrote: >>> >>>> Anybody know what these might be? I found two of them on a DEC >>>>prototyping board along with a bunch of SSI ICs and an Intel 8254 >>>>Programmable interval timer. They have 28 pins and are .6" wide and appear >>>>to be dated 1985. >>>> >>>> Joe >>>> >>>> >>> >>> >>> >>> >>>-- >>>Author: Fred Townsend >>> INET: [EMAIL PROTECTED] >>> >>>Fat City Hosting, San Diego, California -- http://www.fatcity.com >>>--------------------------------------------------------------------- >>>To REMOVE yourself from this mailing list, send an E-Mail message >>>to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in >>>the message BODY, include a line containing: UNSUB CHIPDIR-L >>>(or the name of mailing list you want to be removed from). You may >>>also send the HELP command for other information (like subscribing). >>> >>-- >>Author: Joe R. >> INET: [EMAIL PROTECTED] >> >>Fat City Hosting, San Diego, California -- http://www.fatcity.com >>--------------------------------------------------------------------- >>To REMOVE yourself from this mailing list, send an E-Mail message >>to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in >>the message BODY, include a line containing: UNSUB CHIPDIR-L >>(or the name of mailing list you want to be removed from). You may >>also send the HELP command for other information (like subscribing). > >-- >Author: Jaap van Ganswijk > INET: [EMAIL PROTECTED] > >Fat City Hosting, San Diego, California -- http://www.fatcity.com >--------------------------------------------------------------------- >To REMOVE yourself from this mailing list, send an E-Mail message >to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in >the message BODY, include a line containing: UNSUB CHIPDIR-L >(or the name of mailing list you want to be removed from). You may >also send the HELP command for other information (like subscribing). > -- Author: Joe R. INET: [EMAIL PROTECTED] Fat City Hosting, San Diego, California -- http://www.fatcity.com --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB CHIPDIR-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
