Re: Apple ][gs VGA Card

[z007400b@bcfreenet.seflin.lib.fl.us (Ralph Silverman)]

****begin r.s. remarks
		the v20 & v30 are NEC clones of the 8088 & 8086
		intel processors with extended assembler instruction
		sets substantially unique to these.
		firmware written for these might be remarkably
		spry on account of these instruction sets
		designed to pick up speed in critical areas.
		documentation of these instructions is 
		provided with the a86 shareware assembler which
		evidently supports these.


The Doctor (iigs@wam.umd.edu) wrote:
: David Empson <dempson@actrix.gen.nz> wrote:
: >As far as I know, the only difference between the V20 and V30 is the
: >data bus size: the V20 is 8-bit (i.e. 80188 clone), the V30 is 16-bit
: >(i.e. 80186 clone).
:        ^^^^^
: On page 74-75 of the PCT manual (I have version 1.31 of the manual), it
: says the V30 is a 8086 compatible processor.  I understand that the 8086
: is a 8/16 bit chip.  Now, if the V30 is 80186 compatible, how compatible
: would it be to a 286?  I'm looking for a C++ compiler that works on the
: PCT, but shareware compilers are for 286 and higher (didn't try it since
: I thought it would be incompatible, also I think it requires more than
: 640k).  C++ compilers for the 8088/8086 are pretty much obsolete.  Sorry
: for going off on this tangent.

: >I have some NEC data books at work, so I can find out more information
: >about these chips if anyone wants to know more.

: If those data books can answer how compatible the V30 is to the Intel
: equivalents, I would be much appreciated.
: >-- 
: >David Empson

: Geoff
: -- 
: iigs@wam.umd.edu

-- 

Ralph Silverman
z007400b@bcfreenet.seflin.lib.fl.us