Q: control is a C&T 65550?

[Geert Uytterhoeven]

On Tue, 8 Jun 1999, Daniel Jacobowitz wrote:
> On Tue, Jun 08, 1999 at 04:00:48PM +0200, Geert Uytterhoeven wrote:
> > On Tue, 8 Jun 1999, Daniel Jacobowitz wrote:
> > > On Tue, Jun 08, 1999 at 07:51:39AM -0400, Jason Y. Sproul wrote:
> > > > Is it correct that the /chaos/control chip is essentially a Chips &
> > > > Technologies 65550? If so, does anyone have the variances from the 65550
> > > > datasheet, and if not, what the heck is it? :^)
> > > 
> > > It's my understanding that it's not.  No one has any documentation on
> > > it to my knowledge... I'd love to add hardware cursor support, which
> > > I'm fairly sure it has, to controlfb.  But I can't do it without some
> > > sort of reference.
> > 
> > Move the cursor under MacOS and see which registers or video memory addresses
> > change?
> 
> That's one of those if-i-had-more-time things - and more specifically,
> if I knew how to dump video regs under macos.  Is it trivial?

It's the way all those hardcoded tables arrived in the frame buffer devices for
Apple's video hardware.

Don't ask me more... What's MacOS?

Greetings,

						Geert

--
Geert Uytterhoeven                     Geert.Uytterhoeven at cs.kuleuven.ac.be
Wavelets, Linux/{m68k~Amiga,PPC~CHRP}  http://www.cs.kuleuven.ac.be/~geert/
Department of Computer Science -- Katholieke Universiteit Leuven -- Belgium


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