Re: Who's hogging all the Catbox docs

Will give me a few days to get to my eprom reader, and I think I can hook
you up with the bin file for C5

Kevin

On Mon, Nov 23, 2009 at 6:53 PM, William Boucher <boucher@mnsi.net> wrote:

> Wow, cool reading, thanks for the link. Now if I only had the rom file for
> the eprom chip at C5, I could build one of these from scratch. I'm sure
> that someone who is good with FPGA's could do a large chunk of the catbox,
> if not all of it, in one of those.
>
> With respect to signature analysis on the Cinematronics CPU board, the
> setup is using the 16-bit counter (and a few gates) to cycle the board logic
> and an HP 5004A signature analyzer box. I read somewhere that HP used their
> own proprietary CRC algorithm but I have to wonder if it would be possible
> to scratch build a signature display that would show the same values.
> Obviously, Atari designed their own sig generator with the very simple
> catbox circuitry so it's certainly possible to build something that would do
> the job. The HP5004A unit is getting pretty old and it can be hard to find
> one that is still working. It's hard to sell the Cine Exorciser to people
> that do not have the HP5004A unit. It would be nice to combine an Exorciser
> with its own sig display. Then the HP5004A unit would not be needed. Maybe
> a CPLD sig generator circuit could be built that could be combined with a
> simple microcontroller, say a Microchip PIC that could control a simple LCD
> for the readout and any other settings or indicators desired. The trick is
> to get it to generate the exact same sig codes as the HP5004A does. I
> assume that that would require getting the value of the polynomial correct,
> that is assuming that HP didn't really muck about too much when it came to
> make their sig generator proprietary.
>
>
> William Boucher
>
>
> ----- Original Message ----- From: "Tom McClintock" <tomm@bhpllc.com>
> To: <vectorlist@vectorlist.org>
> Sent: Monday, November 23, 2009 6:54 PM
> Subject: Re: VECTOR: Who's hogging all the Catbox docs
>
>
>
>
>> http://ionpool.net/arcade/signature_analysis/How_Atari_Signature_Analysis_Works.html
>>
>>
>> ?
>>
>> Kevin Moore wrote:
>>
>>> Seems every site I've tried is no longer around.
>>>
>>> I'm looking for some links to catbox info, I've been able to use the cat
>>> box for basic tempest stuff using the tempest doc I have, but when it comes
>>> to doing sig analysis I'm doing something wrong.. I can't get any sigs to
>>> come up.
>>>
>>> Thanks,
>>>
>>> Kevin
>>>
>>>
>>
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Received on Mon Nov 23 20:23:06 2009