INT 13,16 - Change of Disk Status (XT BIOS from 1/10/86 & newer)
AH = 16h
DL = drive number (0=A:, 1=2nd floppy, 80h=drive 0, 81h=drive 1)
on return:
AH = 00 no disk change
= 01 disk changed
CF = set if disk has been removed or an error occurred
- used to detect if a disk change has occurred
- see INT 13,STATUS INT 13,15
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