MS400.5
Running the code:
-----------------
Before running your mailbox program, MBBIOS must be initialized.  MBBIOS
should respond with an "MBBIOS ready" message.  The CBBS and W0RLI users
should now issue an MBMODE for each port the mailbox will use.

Some notes:
-----------

Thanks to K4NTA, KB6IRS, and W0RLI for supporting this work.
You are not restricted to the addresses shown above or IRQ2.  I used
them to try and simplify matters for most people who won't care.
If you need some weird configuration or want to install more than one
card, drop me a note either via U.S.  Mail, packet via AA4RE BBS, or
COMPUSERV.  I can also be contacted through the IBM Radio Club.
If you are absolutely confused as to where the diodes go, send me an
SASE with your desired setup and I will return a board layout with the
pins needed marked.

Roy Engehausen
AA4RE
8660 Del Rey Court
Gilroy, CA  95020