ÔHERE ARE A NUMBER OF ZERO PAGE LOCATIONS USED BY ÊIFFYÄÏÓ. ÔHESE LOCATIONS ARE ALSO USED BY THE ÊIFFYÄÏÓ KERNAL BUILT INTO ÒÁÍÌINK AND ÒÁÍÄRIVE. ÉT IS BEST TO AVOID USING THESE LOCATIONS IN YOUR OWN PROGRAMS IN ORDER TO RETAIN COMPLETE ÊIFFYÄÏÓ COMPATIBILITY. ÁT THE VERY LEAST, YOU SHOULD MAKE SURE THAT YOUR USE OF THEM DOES NOT INTERFERE WITH ÊIFFYÄÏÓ' USAGE. ÊIFFYÄÏÓ 64 ÚERO ÐAGE ÖARIABLES ------------------------------- ÌOCATION ÖARIABLE ÎAME ÎOTE -------- ------------- ---- $26 ALLFLAG/RSIZE 2 $27 COMSAV 2 $9Â KEYBYT 2 $9Æ CJLA 2 $Á3 LDFLG/QFLAG 3 $Á6 TFLAG 2 $Â0/$Â1 KEYPTR 2 $Â0 SPRSAV 1 $Â1 RASSAV 1 $Â2 REGSAV 1 $ÂÅ DRVBYT 2 $ÂÆ DEST 2 ÊIFFYÄÏÓ 128 ÚERO ÐAGE ÖARIABLES -------------------------------- ÌOCATION ÖARIABLE ÎAME ÎOTE -------- ------------- ---- $26 ALLFLAG/RSIZE 2 $27 COMSAV 2 $9Æ CJLA 2 $Á3 LDFLG/QFLAG 3 $Á6 TFLAG/TOGSAV 2 $Â0 SPRSAV 1 $Â1 RASSAV 1 $Â2 REGSAV 1 $ÂÅ DRVBYT 2 $ÂÆ DEST 2 ÎOTES ----- ÎOTE 1 - ÓAVED, THEN RESTORED BY ÌÏÁÄ ROUTINE (NO OTHER USAGE). ÎOTE 2 - ÕSED ONLY FROM ÂÁÓÉÃ FOR ÊIFFYÄÏÓ WEDGE COMANDS, DEVICE TOGGLE, AND FUNCTION KEYS. ÎOTE 3 - ÕSED IN ALL DISK ACCESS AND ÌÏÁÄ ROUTINES.