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computers / comp.sys.dec / System doesn't display anything on the Console port.

SubjectAuthor
* System doesn't display anything on the Console port.Ed Rahn
+- Re: System doesn't display anything on the Console port.Scott Dorsey
`- Re: System doesn't display anything on the Console port.Andy Valencia

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Subject: System doesn't display anything on the Console port.
From: Ed Rahn
Newsgroups: comp.sys.dec
Date: Wed, 24 Feb 2021 00:03 UTC
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Subject: System doesn't display anything on the Console port.
From: edrah...@gmail.com (Ed Rahn)
Injection-Date: Wed, 24 Feb 2021 00:03:41 +0000
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I just bought a Microvax 3100-10 and I don't seem to get anything
out of the console ports. I've got a USB to NULL to H8571J to MMJ
daisy chain. Should that be whats needed? I get the same thing if I
remove the NULL conversion.

All the LED's are light after power and seem to turn off then at
some point in the future.

Any ideas what could be going on? According to the documentation
nothing is being executed. That doesn't really help much.

Thanks,
Ed


Subject: Re: System doesn't display anything on the Console port.
From: Scott Dorsey
Newsgroups: comp.sys.dec
Organization: Former users of Netcom shell (1989-2000)
Date: Wed, 24 Feb 2021 00:49 UTC
References: 1
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From: klu...@panix.com (Scott Dorsey)
Newsgroups: comp.sys.dec
Subject: Re: System doesn't display anything on the Console port.
Date: 24 Feb 2021 00:49:42 -0000
Organization: Former users of Netcom shell (1989-2000)
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Ed Rahn  <edrahn01@gmail.com> wrote:
I just bought a Microvax 3100-10 and I don't seem to get anything
out of the console ports. I've got a USB to NULL to H8571J to MMJ
daisy chain. Should that be whats needed? I get the same thing if I
remove the NULL conversion.

8N1, 9600 or 19200 bps?

Get yourself a breakout box and look at the lights.  And don't ever trust
those crapola USB to RS-232 adaptors. 
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."


Subject: Re: System doesn't display anything on the Console port.
From: Andy Valencia
Newsgroups: comp.sys.dec
Date: Wed, 24 Feb 2021 14:26 UTC
References: 1 2
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From: van...@vsta.org (Andy Valencia)
Newsgroups: comp.sys.dec
Subject: Re: System doesn't display anything on the Console port.
Date: Wed, 24 Feb 2021 06:26:45 -0800
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kludge@panix.com (Scott Dorsey) writes:
Get yourself a breakout box and look at the lights.  And don't ever trust
those crapola USB to RS-232 adaptors. 

Pay attention to which _kind_ of "RS-232".  There's classic (up to +/- 25v,
if memory serves), and 5v and 3.3v TTL style "RS-232".  It doesn't help that
most cheap-o manufacturers (even if they build something which works at all)
do not bother to label it.

Andy Valencia
Home page: https://www.vsta.org/andy/
To contact me: https://www.vsta.org/contact/andy.html


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