🚀 go-pugleaf

In article <CMM.0.90.2.671783143.sverrehu@helblinde.ifi.uio.no> sverrehu@ifi.uio.no (Sverre H Huseby) writes:
>How can I make my program aware that a diskette
>has been removed from a drive, and a new one
>inserted instead?

Hm - I was looking at a related problem - how to make my virus scanner
automatically scan all diskettes inserted, and here is the conclusion I
reached:

On a PC (or PCjr) you simply cannot do this - there is no way to know if
the diskette has been replaced with an identical one.

On most XTs, all ATs, '386 etc.... it is fairly easy... 

		MOV DL, drive
		MOV AH,16H
		INT 13H
		CMP AH,6
		JE diskette_changed

Either do this in the timer interrupt (if you are not in the INT 13H
routine at the moment), or intercept INT 13H, and do this before doing any
reads/writes...

See the interrupt list from Ralf Brown for further information.

-frisk

Fridrik Skulason      University of Iceland  |       
Technical Editor of the Virus Bulletin (UK)  |  Reserved for future expansion
E-Mail: frisk@rhi.hi.is    Fax: 354-1-28801  |