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Author Topic: S+ U18 DUART chip on MPU - what is it for?  (Read 3517 times)
poppo
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« on: December 10, 2010, 11:33:56 PM »
I have several 10mhz MPUs. One is missing U18 (28 pin socketed chip on the right side by the 3.68Mhz crystal), but the game seems to play fine without it. BV works, hopper works etc.  Does anyone know what this chip is used for?  Scratch Head
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Ozzy
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« Reply #1 on: December 11, 2010, 12:38:07 AM »
Required if machine is connected to a host system (on line system)


cheers


Ozzy
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poppo
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« Reply #2 on: December 11, 2010, 01:11:03 AM »
Thanks. That is what I was hoping (not needed for most home users). On a side note, I noticed that there are two jumpers next to it, and some of my boards have no jumpers and some have them in various combinations. That was another clue that it probably was not used in a stand alone situation. Guess I can go 'green' and pull them all out and save a few milliamps.  rotflmao
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StatFreak
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« Reply #3 on: December 11, 2010, 01:32:51 AM »
Thanks Ozzy Hail  Clap +1 (Karma, or whatever)




Quote from: poppo on December 11, 2010, 01:11:03 AM
...Guess I can go 'green' and pull them all out and save a few milliamps.  rotflmao

Send them to me, Mark. I'm saving them up in an old milliamp jar for a rainy day, when I plan to use them in a Tesla coil to make my own lightning.. stir the pot / get cooking  lightning bolt
Crazy frying pan Cry Laughing Cry Laughing Cry Laughing


P.S. Maybe I'll just send them to coorslight115 to use in his giant T. coil.  Tongue Out Burning Resistor
« Last Edit: December 11, 2010, 01:42:22 AM by StatFreak » Logged
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