HelpPC 2.10 Quick Reference Utility Copyright 1991 David Jurgens

                     INT 1A,0 - Read System Clock Counter

       AH = 00

       on return:
       AL = midnight flag, 1 if 24 hours passed since reset
       CX = high order word of tick count
       DX = low order word of tick count

       - incremented approximately 18.206 times per second
       - at midnight CX:DX is zero
       - this function can be called in a program to assure the date is
         updated after midnight;  this will avoid the passing two midnights
         date problem

Esc or Alt-X to exit int 1a,0 Home/PgUp/PgDn/End ←↑↓→
Converted to HTML in 2006 by Timo Bingmann