🚀 go-pugleaf

MORTEN KNUDSEN (mortenk@dhhalden.no) wrote:
: In article <1992Dec10.003011.14950@news.tufts.edu> pmorvill@jade.tufts.edu (Paul Morville) writes:
: >From: pmorvill@jade.tufts.edu (Paul Morville)
: 
: Is the 8088 a 16 bit or 8 bit micro? I seem to remember that Intel's 
: referance manual described it as a 8 bit micro.

The 8088 was a 8 bit "version" of the 16 bit 8086.  When talking about
a processor, you need to talk about internal architecture and external
bus width.  The 386SX is 32 bit internal, with a 16 wide bus.  

Don't assume 'SX' means 1/2 the internal bus width, though.  The 486SX
actually has the full 32 bit bus, but is missing the coprocessor ("actually"
the 486SX is a product entirely conceived by a marketing manager!).

I think it's like this.  Anyone please correct me if I'm wrong...

	processor   internal    external     coprocessor
	  8086        16          16            nope
	  8088        16          8             nada
	  80186       ?           ?             nix
	  80286       16          16            nyet
	  80386       32          32            na
	  80386DX     same as 80386
	  80386SX     32          16            no
	  80486       32          32            yup
	  80486SX     32          32            nope *

 * to show what a scam intel pricing is, the first 80486SX's
   had the math coprocessor on chip, but disabled!