???? Has anyone replaced the 80286 with NEC's V40 (6300+) ?????

[Anthony J Stieber]

<<<<<<<<<<<<<<<<<<<<<<<< E A T   T H I S   I N E W S ! >>>>>>>>>>>>>>>>>>>>>>>>

In article <10021 at netnews.upenn.edu> silver at eniac.seas.upenn.edu.UUCP (Andy Silverman) writes:
>In article <2103 at csd4.milw.wisc.edu> alavi at csd4.milw.wisc.edu (Alavi Ronette Salehi) writes:
>>	I Have an AT&T 6300+ and wanted to know if there is anyone out there
>>	who has replaced the 80286 CPU with a NEC V40 chip. If so what is
>>	the performance improvement?
>>	also what about compatibility?
 
>I got flamed out on this topic a few months ago.  It turns out that the
>80286 can't be replaced with a V40 because the two aren't completely
>pin-compatible.  So sorry.  Am I wrong?  I'm pretty sure that this is
>the case.
>+----------------+-----------------------------------------+
>| Andy Silverman | Internet:   silver at eniac.seas.upenn.edu |
>|     "Why?"     | Compu$erve: 72261,531                   |
>+----------------+-----------------------------------------+

The NEC Microcomputer Products Databook 1987 describes the V40 as an 8/16
bit microprocessor, the 80286 is a full 16 bits.  The V50 is described as
a V40 but with a 16 bit data buss.  These two V-series chips seem to
be clones on the Intel 8018x processors with 8080 emulation.  The V60 chip
appears to be the 80386.  Apparently NEC never got a license to fabricate
the 80286, in fact I think Harris was to the only company to second source
that chip.
--
Tony Stieber	astieber at csd4.milw.wisc.edu
	"Electrons never die, they just go to the old volts home."