Eric, >> Apologies, I misread my own source file (early!) this morning. UIDE >> and UIDE2 check 0:48Fh (not 448h) for the bits that indicate if drive >> A: or B: suipport a media-change line. Note the BIOS data lists at: >> <http://www.bioscentral.com/misc/bda.htm> > > This document states that bit 0 and 4 indicate change > line support for drive A: and B: respectively, but > RBIL states that the bits are about 80 track support. > > A safe option would be not to "read 40:xx coffee grounds" > but instead use the well-documented int 13 interface...
As I just got through noting, in another post, why would the BIOS data include diskette change-line flags if they were NOT intended to be USED?? Until someone can positively REFUTE the data offered by the BIOS Central data-table list, my opinion is that neither you nor any- one else can say Int 13h is better or 40:xx is "coffee grounds"! Given how UIDE/UIDE2's diskette I-O has never been a problem BUT for VirtualBox, I will keep UIDE/UIDE2 as-is. VirtualBox users now have the /E switch they can specify with my drivers, and all other users of hardware PCs and (NOT so "flaky") hardware change lines will continue to run just fine! Jack R. Ellis ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Freedos-user mailing list Freedos-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/freedos-user
