[comp.sys.dec] How do you drive the video board from a VAX station 2000?

iane@bhpmrl.oz.au (Ian Evans) (11/08/90)

I am interested in using the Q-bus video board from a Vax station 2000 in
a non-VMS application.  Does anyone have the source code for any drivers,
or any information as to the registers and memory mapping that it uses?
It is driving a 19" black & white VR260 monitor, and comes from (I think)
an SV-LV55W-EN system.  VMS seems to think it's a QVSS or something.  The
DEC board number is M7602 (not that that seems to help much).

I have found out the registers to talk to the 6845, 9519 and 2681, but
that still leaves 12 registers of unknown function.  The video seems to
be memory-mapped, but there are some extra 64-bit and 2kx8 RAMs that I
don't even know the purpose of, let alone how to address them.

I know that it's more of a challenge to work it all out by trial-and-error,
but I'm getting lazy in my old age.  Replies via e-mail will help compensate
for my erratic news reading (address is iane@merlin.bhpmrl.oz).

Thanks.