30 Mar
2020
30 Mar
'20
9:52 a.m.
Vectoring through 24 was very important back in the core memory days
when the memory would still be there after a power failure and you
wnated the system to keep running, as was our Ontario Bellboy paging
controller.
cheers,
Nigel
On 30/03/2020 12:49, Paul Koning via cctalk wrote:
--
Nigel Johnson
MSc., MIEEE
VE3ID/G4AJQ/VA3MCU
Amateur Radio, the origin of the open-source concept!
You can reach me by voice on Skype: TILBURY2591
If time travel ever will be possible, it already is. Ask me again yesterday
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Nigel Johnson <nw.johnson at ieee.org>
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On Mar 30, 2020, at 10:17 AM, Robert Armstrong
via cctalk <cctalk at classiccmp.org> wrote:
Thise signals don't seem like a problem: just hardwire
them to the desired logic level. PDP-11s need a real functioning DCOK signal iff you want
to do power fail interrupt handling, otherwise they don't. Do VAXen have power fail
interrupt? If yes, does anyone actually use it?
paul
Looks like for this enclosure an ATX supply could
well work.
For my VAX my notes say it didn't.
A VAX would certainly be harder.
You'd have to kludge up the ACOK and DCOK signals for one thing, which I don't
think the R400x uses.