Vaxstation 4000 m60 and NetBSD
systems.glitch at gmail.com
Sun Jan 7 14:43:01 CST 2018
I may have a spare VS3100 with framebuffer, I don't remember if both of
mine are MicroVAX or if one is a VAXstation.
On Sun, Jan 7, 2018 at 2:35 PM, David Brownlee via cctalk <
cctalk at classiccmp.org> wrote:
> On 2 January 2018 at 21:02, Maciej W. Rozycki via cctalk <
> cctalk at classiccmp.org> wrote:
> > On Tue, 19 Dec 2017, Charles Dickman via cctalk wrote:
> > > > Hardware support say no support for LCG Graphics :-(
> > >
> > > There are a few people willing to work on graphics for old
> > > vaxstations, but there is no documentation.
> > >
> > > If anyone has documentation, the netbsd vax port mailing list would be
> > > very interested.
> > The RAMDAC is standard, so as long as frame buffer memory is mapped into
> > the CDAL address space writing a dumb device driver should be pretty
> > straightforward with little reverse engineering effort. And CDAL address
> > decoding is I believe documented in the KA46 board specification.
> > And all else failing you can always resort to TURBOchannel graphics
> > via a TURBOchannel adapter. While not supported by the console monitor,
> > it can be handled by the OS just fine, and several TURBOchannel graphics
> > drivers are already available for other ports, so it's just a matter of a
> > suitable kernel configuration (with minor patching possibly, depending on
> > how cleanly written the respective drivers are).
> > I was able to get OS console output using at least the HX and one of the
> > HX+ options with my m90 and the (still very crippled and long neglected)
> > VAX/Linux port several years ago. The MX, CX and TX options should be
> > easily supportable too. Only accelerators (PixelStamp and PixelVision
> > architecture implementations) might cause trouble for one reason or
> > another (such as using DMA or requiring a TURBOchannel extender, which
> > scarcer than hen's teeth).
> I've been chatting to the NetBSD dev who wrote support for most of the
> sparc framebuffers (up to and including accelerated antialiased font
> console support where relevant), and if anyone has a spare VAXstation with
> a framebuffer they would be willing to part with (*) he would be very
> interested in writing driver support.
> (*) I'm happy to pay a reasonable amount to help find a beloved charge a
> caring new home involving active exercise with exciting new code :-p
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