Re: PET diagnostics

From: Rob Clarke <>
Date: Wed, 11 Dec 2013 21:13:51 +0100
Message-ID: <>
Yes, but it was only in the basic 1 ROM set. I have an original set of 
documentation and dongles somewhere if you can't find it on-line.

I don't recall if it displays anything though, I think it used the red 
LED on the mainboard.


On 11/12/2013 21:08, Christian Dirks wrote:
> Hi all,
> does anyone know, if there really is a diagnostic routine in the PET
> ROMs, and if so, what it should do/display ?
> When I power up my 2001-8C with the daignostic pin connected to GND, it
> blanks the screen and nothing more seems to happen.
> A quick test with a 'hello world' basic program works.
> The used ROM set is:
> 6540-019, -013, -015, -016, -012, -014, -018.

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Received on 2013-12-11 21:03:45

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