with an i n t e r r u p t c a l l In d e t a i l i t checks i f APM ( advanced power management) i s available . I n t 15h 5300h − APM s p e c i f i c a t i o n : I n s t a l l a t i o n check Input : a r r y f l a g )=0) then begin Writeln ( 'APM v ' , ( r . ah and $f ) , ' . ' , ( r . al shr 4) , ( r . al and $f ) , ' detected ' ) ; end else Writeln ( 'APM not present ' ) ; end . 54.19.48 request_linear_region