www.delorie.com/djgpp/doc/rbinter/FF.html   search  
Int 0x1A, AH=0xff

1AFF INT 1A - AT&T 6300 - SET TIME AND DATE
1AFF INT 1A - RighTime v1.1 - PERMANENTLY DISABLE
1AFF00 INT 1A - SND - INSTALLATION CHECK???
1AFF01 INT 1A - SND - PAUSE
1AFF02 INT 1A - SND - START SOUND
1AFF03 INT 1A - SND - STOP SOUND
1AFF04 INT 1A - SND - PLAY MUSIC STRING IN BACKGROUND
1AFF05 INT 1A - SND - UNCONDITIONALLY STOP SOUND