Re: OSF/1 binaries

Robin Cutshaw (robin@intercore.com)
Wed, 15 Nov 1995 09:16:27 -0500 (EST)


>
> Well, not *strictly* true; one *could* pop an ISA S3-based card into a
> JENSEN (*many* #9GXE's were shipped on JENSEN with NT). Then all that
> would be necessary would be to rebuild the XF86_S3 server with the
> following restrictions:
>
> 1. the "libc" it gets linked with would have to do the "Jensen swizzle",
> for I/O space (register) accesses (ie 7-bit shift, not 5...). Not a
> big problem, as it'd be invisible to the server code.
>
> 2. the server would need to be instructed to make *NO* direct memory
> accesses, which fortunately the S3 server running the 928 chipset
> *can* live without. This is because the JENSEN does *NOT* support
> DENSE space memory accesses, which is the only thing the server knows
> about (actually it thinks its looking at normal memory :-).
> Changing the server to do SPARSE space
> accesses would force the programmer to do *UNSPEAKABLE* things to the
> code. I know; I've been there, and done that (or at least watched it
> done... :-).
>

Do the other axp models have these restrictions? Some of the newer
pci graphics cards require a direct memory model to access the
framebuffer.

robin (robin@XFree86.Org)