24 Nov
2006
24 Nov
'06
11:30 a.m.
On 24 Nov 2006 at 14:07, Sean Conner wrote:
The major problem with that is MS-DOS---it can't
handle non-contiguous RAM
and therefore there is no standard way to reserve or use memory in the upper
384K of the address space (well, for those PClones that followed the IBM
spec).
I seem to recall a few PCs with built-in CGA display adapters gave
one more contiguous memory than 640K by filling the space between
A000 and C000 with RAM. And many "not very compatible" PCs running
MS-DOS made the entire 1MB available.
Anyone with an old Visual Commuter want to verify this? I think that
the Commuter was one of the aforementioned.
Cheers,
Chuck