Bombproofing for DIRACC
-----------------------

One of the hazards of using DIRACC (DL1) is that you can get into
TELCOM with it unloaded, without knowing it, and get unpredictable
results when you try to access TEXT or BASIC via F6 or F7 while in
TELCOM.  Another pitfall is that the Basic definition of F6
installed with DIRACC may have been changed by another program --
not allowing you to get back to Term from Basic.  The following
approach to running DIRACC should avoid these problems.

1) Install DIRACC per one of the programs (e.g., with my loader
versions DIRACC.PW*).

2) Install the following Basic program on your menu:

0 '"RUNDAC.BA" - DIRACC Telcom Access
1 IF (PEEK(HIMEM)=225 AND PEEK(63587)=72) THEN CALL 20806 ELSE BEEP:MENU

This tests to see if the first byte of DIRACC is where it should
be and checks the 10th byte in the Basic Key 6 definition area, to
make sure it has not been changed from "H", the value loaded in
when DIRACC was installed.  Note that the spaces in this program
are for clarity and can be removed.

3) Now when you go into TELCOM, do it by running RUNDAC.BA.  If
you get into TELCOM, the tests have been passed; othewise DIRACC
is not present and/or the Basic F6 key definition is faulty -- and
you will end up back at the Model 100 main menu.

This is pretty bombproof, barring some corruption of upper parts
of DIRACC.

Phil Wheeler [71266,125]