Thank you so much, Paul. Much appreciated! -- Dave ========================================================================== From hf.intel.com!prp Tue Oct 7 09:19:49 1997 From: Paul Pierce <prp(a)hf.intel.com> To: Dave Fafarman <davef(a)wesco.com>om>, classiccmp(a)u.washington.edu Subject: Re: Question -- IBM 704 Dave, The IBM 700/7000 scientific computers (701, 704, 709, 7090, 7094, 7044 etc.) had a 36-bit word. Number representation is binary sign/magnitude. From the 704 on the instruction size is 36 bits and there is hardware floating point. It is an accumulator architecture derived from Von Neumann's IAS machine. Programmer visible registers are an accumulator (38 bits), multiplier/quotient register (36 bits) and 3 index registers (15 bits.) It had 8K to 32K words of core memory. Mass storage was magnetic tape or punched cards. Web references: IBM 704 Manual (selected pages) - http://www.cs.virginia.edu/brochure/images/manuals/IBM_704/IBM_704.html Von Neumann and the IAS - http://ei.cs.vt.edu/~history/VonNeumann.html Paul Pierce http://www.teleport.com/~prp/collect