Re: [stella] atari schematics & a Q about the TIA

[Kevin Horton <khorton@xxxxxxxxxxx>]

At 02:36 PM 8/13/01 -0400, you wrote:

> alright first off i hope this is not off topic, but i am starting a 
> project that is to get all the schematics for the atari 2600 jr. this is 
> because none have been found yet. i know there are schematics for the 4 
> switch and other systems but none for you jr. and yes there are a few 
> internal diff's from the 4 to the jr.
>
> anyway i have the power section almost done and am looking for help doing 
> the rest, so if anyone is good at electronics or wants to help please 
> reply and let me know what you can do.
>
> i want to do this as i am sure it will help unlock a few secrets about 
> this great system and mabe even lead to some great hardware hacks that 
> will make programming on this system even better.

Heh.  I already RE'd and schematicized the 2600. I had to generate them 
when I made Bankzilla so I knew what went where.  Of course the vid circuit 
on Bankzilla is different than the one shown on the schematic, but this is 
for a 2600 Jr.

http://tripoint.org/kevtris/2600/index.html

As for unlocking secrets, there's not really much there which isn't already 
known 'cause it is a pretty simple setup.

BTW, I'm still looking for a gate-level schematic for the TIA.  What ever 
happened to someone hunting down more info on this?  Did anything come 
about from it?  I could make custom TIA's using FPGA's possibly which 
output RGB video directly. (much higher quality than a regular TIA can produce)


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