Jack,
>>> UIDE has NEVER ignored if a diskette has change-line support! It >>> does in fact check the BIOS data table at 0:448h for bit 0 (change >>> line for diskette A:) or bit 4 (change line for diskette B:). If >>> those bits are off, diskette A: or diskette B: will not be cached. >> >> if UIDE would check INT13/15 if change line is supported, and not >> cache the floppy if it's not supported everything would be fine (and >> /N5 not needed). I can't locate any documentation about 0:448. > 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> to make a long answer short: in VirtualBox, 40:8f is 00 again, clearly stating 'change line is not supported' Tom ------------------------------------------------------------------------------ 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
