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- Newsgroups: alt.folklore.computers
- Path: sparky!uunet!pipex!pavo.csi.cam.ac.uk!rf
- From: rf@cl.cam.ac.uk (Robin Fairbairns)
- Subject: Re: RSX-11 console light-show / HOW?
- Message-ID: <1992Nov23.103523.10591@infodev.cam.ac.uk>
- Keywords: rsx-11m, console lights, implementation
- Sender: news@infodev.cam.ac.uk (USENET news)
- Nntp-Posting-Host: lelaps.cl.cam.ac.uk
- Organization: U of Cambridge Computer Lab, UK
- References: <By0n1M.7MC@sci.kun.nl>
- Date: Mon, 23 Nov 1992 10:35:23 GMT
- Lines: 29
-
- In article <By0n1M.7MC@sci.kun.nl>, geertr@sci.kun.nl (Geert Rolf) writes:
- |> On old PDPs, those with real console lights *), the RSX-M operating
- |> system privides an option for an idle job that plays around
- |> with the console lights.
- |>
- |> Apart from being nice to see, you can also watch the machine
- |> going under load.
-
- Ahhh.. It brings it all back.
-
- |> As far as I know, you can use a RESET instruction to get a
- |> pattern visible on the console lights. Ie: store pattern in
- |> 177570 and do the RESET.
-
- Nah - The RESET wasn't necessary (at least, on /45s). There was a
- selector switch, however, which decided what was to be displayed. It
- says here (getting trusty /45 processor handbook out ;-) that the
- display could show "DATA PATHS", "BUS REGISTER", "FPP \micro ADRS.CPU
- \micro ADRS" or "DISPLAY". Only in that last position did 777570 get
- displayed.
-
- |> However, I cannot imagine the RSX-11 idle job keeps doing
- |> RESET all the time!! (and reinitialise all devices after that)
-
- Indeed not.
- --
- Robin (come back John Drummond) Fairbairns rf@cl.cam.ac.uk
- U of Cambridge Computer Lab, Pembroke St, Cambridge CB2 3QG, UK
- "They had twelve years to lay in wait for us" - Bush supporter on Nov 4
-