Date   : Tue, 03 Mar 2009 00:01:11 +0000
From   : jgh@... (Jonathan Graham Harston)
Subject: Fwd: New Screen Modes with ARM7 Co-Processor?

Tom Walker wrote:
> Some of the later A500 copros had VIDC chips on, I suspect that would be
> usable (otherwise why would they have bothered?). Whether it would be of any
> _practical_ use I don't know, essentially by that point you've got an
> Archimedes with a BBC hanging off the end.
 
How else would they have developed the VIDC VDU drivers without
having a board with VIDC video hardware on it?
 
Back in the '80s I sketched together a design for an external
video board for the Beeb with 128K of memory that could go up to
80 columns, 16 colours. You effectively talked to it as though it
was a host processor, and the Beeb itself was a CoPro. 
 
-- 
J.G.Harston - jgh@...                - mdfs.net/User/JGH
The most perfect world is an imperfect world as the imperfections
give people a reason to strive to change it.