From: Mike N. 

On Thu, 26 May 2005 04:15:55 -0400, "Tony Ingenoso"
 wrote:

>Actually, the 640K limit has little to do with the way DOS was designed, and
>everything to do with the location of the EGA/VGA graphics memory that was
>unfortunately parked at A000:0000.  An unhacked stock DOS with a BIOS that
>supports memory scanning beyond 640K (a Taiwan BIOS by an outfit named RIMOS
>had one in a clone I had) will happily count memory up to whatever you have
>in the box.

  I had a Zenith Z100 MSDOS box and there was some mod you could do to give
you 900-someK of RAM (I forget the exact number).   I made use of that to
run some large programs before LIM/EMS/XMS memory became popular.

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