Interrupts In Basic

 BBS: Inland Empire Archive
Date: 02-22-92 (22:12)             Number: 132
From: PHIL PENNE                   Refer#: NONE
  To: ALL                           Recvd: NO  
Subj: Interrupts In Basic            Conf: (5) Dr_Debug

Oooookay.  I thought I was slick in BASIC until I started using
interrupts.  I ran across one program (here in Dr. Debug) that shows how
to do a print screen under program control:

               110 a%(0)=&H5CD:a%(1)=&HCB
               120 p=varptr(a%(0))
               130 call p

...and it works like a champ.  Why?!?!  I understand the CALL function,
and I know that I am locating a variable address in line 120, but where
do the &H5CD and &HCB come from (does the 5 represent INT5?) and what do
they do?  It's still magic to me...
 * SLMR 2.0 * A crowded elevator smells different to a midget...
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