What brand is the chip? Rockwell used to make a 387dx copro that worked with almost anything, but I haven't seen one since running my old Packard-Bell 386/12 back in '90... Cheers... Ed Tillman Store Automation Tech Support Specialist Valero Energy Corporation San Antonio, Texas, USA Office: (210)592-3110, Fax (210)592-2048 Email: edward.tillman(a)valero.com <mailto:edward.tillman@valero.com> -----Original Message----- From: zaheem khalid [mailto:zaheem50@yahoo.com] Sent: Wednesday, December 03, 2003 10:35 PM To: cctech(a)classiccmp.org Subject: information about 80387ex-33 hi , I didnot find any information on 387ex coprocessor , not even the pinouts, I am trying to interface the coprocessor with 386ex.first i was was looking for the 387sx as mensioned in the intel 386ex manuals.but the suuplier gave me the 387ex of which i have never heard off. if any one has nay information on this misterius coprocessor please inform me ,i will me very thankfull, i am also a short on time . thanks --------------------------------- Do you Yahoo!? Free Pop-Up Blocker - Get it now