500/2000 PORT PROBLEM
11-Dec-87 12:00:45
Sb: #97833-500/2000 PORT PROBLEM
Fm: John Draper 76703,4322
To: lawrence neibauer 74017,450
Larry,
This will not work. You stand a chance of frying something at worst, and of
not having it work at best. The reason there are RS232 adapters available for
the 64 is because the 64 has only a user port operating at a voltage range
between 0 and +5V. The adapter is to convert the signals to RS232 levels, which
range between +12V and -12V. Putting -12 onto an output pin of the user port is
not healthy for the silicon on eiether end of the wire.
Regards, Larry.