ISAT()
 Determines if a program is running on an AT
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 Syntax

     ISAT() --> AT

 Returns

     ISAT() returns .T. value when the program is running on an
     AT-compatible system.

 Description

     ISAT() determines if your CA-Clipper application is running on an
     AT-class system.

 Note

     .  The function also returns .T. for systems with an 80386 or
        80486 processor.

 Example

     Since you can set the hardware clock on an AT (in contrast to an XT),
     use ISAT() to determine if SETDATE() and SETTIME() function properly:

     IF ISAT()
        ? "The internal clock can be changed."
     ELSE
        ? "Time and date will be lost after booting!"
     ENDIF