[comp.sys.atari.8bit] 1200XL video/RS-232 interface/thank you

richardn@sdd.hp.com (Richard Natali) (08/27/90)

Hello all Atari 8-bit people:

This is a thank you and a recap note.  

I posted a note asking about an RS-232 to Atari interface, and got lots
of good responses.  What I ended up doing is buying an interface from
someone on the net.  It wasn't the ICD PR connection or the Atari 850.
I had to modify my 1200XL so that pin 10 on the Atari connector would
supply enough current:  Short R63 on the 1200XL PCBoard.

Also, I did the video modification suggested earlier:

         Originally         Change to

R22          4.3K              6.2K

R188       910 ohm          1N914 diode with cathode towards
                                 bridge rectifier

R163       100 ohm            150 ohm

R145        n/c                18K ohms

The video is a bit better, but it's not a huge improvement (it wasn't
too bad to begin with)

Everything works, and better than before.  Thanks to:

AAron nAAs
Eric Charlton
Nick DiMasi
Eric Sokolowsky
jnorman
bill dunaway


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