VAX 4000/300 start up / KA670 issues

[Aaron Jackson]

> On 14/09/2020 15:02, Aaron Jackson via cctalk wrote:
>> Hi Dave,
>>
>> In my ignorance I incorrectly assumed the DHQ11 was a SCSI controller
>> because it has compatible centronics sockets. Thinking about the name
>> that was obviously wrong!
>
> For the future:
> http://www.bitsavers.org/pdf/dec/qbus/EK-DHQ11-UG-002.pdf :-)

:)

>
> I've not seen an octopus cable in a long time.
>
>> I have two Emulex UC07, one is spare and the other is in my PDP-11. If I
>> install this into the VAX Q22 bus do you think it will explode or work?
>
>
> The BA440 Qbus is 22 bits, so that should be fine shouldn't it? I've
> never tried that combination, so I don't know for sure, but I think the
> BA440 is QQCD (or whatever the designation is), no serpentine.

I was fairly sure it would be ok so plugged it in and managed to get
into the Emulex configuration menu very quickly. Next step, installing
NetBSD :)))

>
>
>> Even if this did work it wouldn't be ideal but I'm not sure of any
>> alternatives at the moment.
>
>
> KDB50 + RA drive? An RA7x would (almost certainly) fit in one of disk bays.
>
>
> You're supposed to use RF disks. I have an RF35 (or maybe two drives)
> here but I don't know their status. I *think* they're SCSI with an
> adapter board, and if so I could check the disk status at least.

I will look into this. thanks!

Aaron

>
>
> A further alternative would be an HSDx0 + BA350 + StorageWorks disks in
> caddies.
>
>
> Antonio


--
Dr Aaron S. Jackson
Computer Vision Laboratory
School of Computer Science, University of Nottingham

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I will be on leave every Monday and Tuesday until October 2020.
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