After a successful project with the '56, my next project is a little more
ambitious.  I'm planning on using a '63 but have a few questions.

1)  The USART asynchronous mode "uses standard nonreturn to zero )NRZ)
format..."  is this what RS-232 uses?  Can I just hang a MAX232 off the
pins and get an RS-232 port?

2)  What is this whole shebang about two banks of registers?  If I need to
swap the two banks in and out, why do they have different addresses?  I'm
confused.  I mean, portc is at 07h and trisc is at 87h.  They have unique
addresses, why is it necessary to switch banks?  Can't they just be
addressed directly?

Obviously, I'm missing something here...

-Matt


  "DOS Computers manufactured by companies such as IBM, Compaq, Tandy, and
millions of others are by far the most popular, with about 70 million
machines in use wordwide. Macintosh fans, on the other hand, may note that
cockroaches are far more numerous than humans, and that numbers alone do
not denote a higher life form."