Re: sgi O2 VICE and Nintendo64

[Michael <macallan%netbsd.org@localhost>]

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Hello,

On Mar 5, 2013, at 6:17 AM, roop wrote:

> I had a memory burp: O2 VICE and Nintendo64 ; someone asking about  
> N64 kernel;
> Brain righted itself n64 (32/64bit ABI) not N64 (Nintendo), or n32  
> or o32 subset.
>
> Anyway, I randomly googled, refreshing my world view that the O2 is  
> scattered
> amongst the different projects;
> - The hardware acceleration in VICE (derivative found in Nintendo64)  
> was in
>  Linux 2.5.x (http://www.linux-mips.org/~glaurung/),
> - Macallans excellent O2 2D acceleration work (didn't use VICE IIRC)  
> X11 work
>  in NetBSD (http://my.opera.com/Macallan/blog/2009/04/01/xorg-on-o2)
>  (Was this only XFree, or was carried over to Xorg?)

It's in -current Xorg as well. Using VICE there makes little sense  
since:
- - the MTE is much, much faster. Can't always use it but if we can it's  
running circles around everything else you can find in the O2.
- - the drawing engine supports everything we need in a console driver  
and basic X, I doubt VICE could beat it speed-wise doing simple,  
unaligned bit ops.
VICE is useful for more complex stuff that the drawing engine can't  
do, like video filtering and whatnot. Since it's a separate, fairly  
non-standard CPU ( a funky R3k-ish thing with a SIMD unit instead of  
an FPU ) that's kinda complicated though.
If anybody wants to give it a shot I have the manual.

have fun
Michael

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