Re: SPARCStation VSIMM

[Malte Dehling <mdehling%gmail.com@localhost>]

On Mon, Nov 01, 2021 at 07:28:03AM -0400, Mouse wrote:
> I'm also told, elselist, that
> 
> < In terms of CG14/SX hardware register-level "documentation", there is
> < an open-source CG14/SX emulator module for qemu-sparc, capable of
> < running a GUI ie: using the normal O/S drivers, at least for
> < NeXTSTEP.  Whether it emulates just a dumb CG14 framebuffer, or also
> < emulates some SX acceleration features, I'm not sure.
> 
> < https://tyom.blogspot.com/2010/05/sx-framebuffer-emulation.html
> 
> I haven't yet looked at it myself.  If it turns out to be more than
> dumb-framebuffer emulation, it might also be helpful.

Support was added by Bob Breuer.  From the qemu-devel mailing list:

Chipset docs are hard to come by.  But here's what I've found:
    "Sun-4M System Architecture" section A.II.3 briefly covers VSIMM and
DSIMM size detection.
    Linux kernel 2.6 drivers/video/cg14.c has most of the registers named.
    US Patent 5815137 covers the cursor implementation, but it includes
drawings which show the various color and lookup table muxing and
blending capability.

Cheers,

-- 
Malte Dehling
<mdehling at gmail.com>