OpenEuphoria

Re: Memory

• Posted by Jacques Deschenes <desja at QUEBECTEL.COM> Jan 05, 1997
• 1009 views

>
>Hi Sam,
>
>There are 16 bytes reserved in the BIOS data area at address #4F0 to #4FF. This
>is for  "Inter Application Communication" but I don't think any one uses
it, you
>might store your password data there.
>
>Regards - Peter
>

 I tested it. It works if it's done in pure dos environment.
But under windows 95, it work only if the 2 dos programs are run in the same dos
virtual machine. That mean if you launch the first program from windows and
come back
to windows closing this dos box. then the second program is launch. It wouldn't
find the password.  The reason is that windows create a virtual dos machine
different
for each dos session (for both program it seem to be the same address, but
in fact
it is not.)

  Someone mention the idea of writing to the environment.  If so you have to
write
to the parent process environment.  As each program has its own copy of the
environment which is destroyed when then program end. To preserve the
information you have to write to master environment.  Under windows the same
limitations as above apply.


Jacques Deschenes
Baie-Comeau, Quebec
Canada
desja at quebectel.com