6 Jun
2026
6 Jun
'26
4:56 p.m.
The KA630 will definitely work in a BA23 with a H9278 backplane I have
one, but now the BA23 is used for an 11/73.
I also had a QD21 at one time and vaguely remember the procedure you
talk about, which did work for me.
What slot are you putting the QD21 into? Remember the backplane has
ABCD for the first three slots, but ABAB from there on and the grants
must be continuous.
cheers
Nigel
On 2026-06-06 16:04, Jon Elson via cctalk wrote:
> Hello,
>
> I have been trying to set up a uVAX-II to demo at the VCFMW. I got a
> BA23 box from Paul Anderson that was originally an LSI-11 box with an
> H9278-A backplane.
>
> The uVAX passes the POST and then comes up with ODT on the serial
> console.
>
> I then have tried to do the configuration of an Emulex QD21 disk
> controller. The procedure opens a memory map for DMA to main memory,
> and then has you deposit to a couple registers. Then, the controller
> is supposed to copy a diag/config program to VAX memory via DMA. This
> step fails. I have tried some poking around in the backplane, but so
> far I do not see a reason why the DMA is not working. Of course, the
> QD21 could be bad. I have tried two KA630-AA boards, same result.
>
> Does anybody know why a uVAX-II would not work in an H9278-A
> backplane? Are there jumpers to adjust?
>
> Thanks,
>
> Jon
>