Re: PET diagnostics

Thank you, Rob.
A look at the schematics looks like your described user port connector
makes sense:
CA2 - VIDEO
PA0 - SRQ
PA1 - EOI
PA2 . DIAG - GND
#1 READ - #1,2 WRITE - #2 READ
PA6 - VSYNC
PA7 - HSYNC

I will give it a try.

Christian

Am 12.12.2013 08:12, schrieb Rob Clarke:
> Need to get to work so this is quick. The user port connector has no
> keys to prevent wrong insertion and no obious markings but this seems
> most logical. You might want to double check this against the schematics.
>
> 2-B
> 3-C
> 4-D
> 5-E-11
> 6-7-8
> 9-K
> 10-L
>
> Keyboard connector, assuming pin 19 is the keyed pin
>
> 1-9-17
> 2-10-18
> 3-11
> 4-12
> 5-13
> 6-14
> 7-15
> 8-16
>
> It's been on my to-do list to disassemble the diagnostic code in the
> basic-1 ROM's to figure out exactly how it works. I'm happy to
> collaborate on this if you want.
>
> cheers, Rob
>
> On 12/12/2013 07:20, Christian Dirks wrote:
>> Hi Rob,
>> thank you very much for your effort.These will help me a lot.
>> Could you also post the connections of the dongles ?
>>
>> Christian
>>
>> Am 12.12.2013 00:10, schrieb Rob Clarke:
>>> Hi Christian,
>>>
>>> i just scanned the "Testing the PET Computer" document that covers how
>>> it works. You can find it here:
>>>
>>> http://www.inchocks.co.uk/commodore/PET/Testing_The_PET_Computer.pdf
>>>
>>> The additional test programs referenced in the doc came on a set of
>>> tapes ( http://www.inchocks.co.uk/commodore/PET/Tapes.jpg ) most of
>>> which which you can find here:
>>> http://www.inchocks.co.uk/commodore/PET/ServicePackTapes.zip
>>>
>>> Steve, I wrote a PET diagnostic routine which tests the RAM and CRC
>>> checksums the ROM's which you're welcome to include.
>>>
>>> Rob
>>>
>>> On 11/12/2013 21:34, Christian Dirks wrote:
>>>> Hi Rob,
>>>> the used ROM set should be basic 1 according to
>>>> http://zimmers.net/anonftp/pub/cbm/firmware/computers/pet/README.also
>>>> I found a youtube video that claims to show 'A successful pass of the
>>>> diagnostic rom': http://www.youtube.com/watch?v=l5E8mpfBbZg
>>>> Unfortunately no further information :(
>>>> Could you take a look at the documentation and dongles ?
>>>>
>>>> Christian
>>>>
>>>> Am 11.12.2013 21:13, schrieb Rob Clarke:
>>>>> 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.
>>>>>
>>>>> Rob
>>>>>
>>>>> 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.
>>>>>>
>>>>>         Message was sent through the cbm-hackers mailing list
>>>
>>>        Message was sent through the cbm-hackers mailing list
>>
>
>
>       Message was sent through the cbm-hackers mailing list


-- 
Christian Dirks
Toast_r@Idealine.info




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