Jack-181 wrote: > > I will NOT cache a drive which cannot tell me when its media has changed, > and I REFUSE to add all of the > logic in UIDE that Eric notes the DOS kernel contains, to find out if a > media-change has occurred using other methods!
It's not impossible to cache floppies, Jack. You just need to do it differently than you're doing now. Probably the simplest thing you can do is an "indirect collaboration" with DOS. You can simply ignore the hardware change line completely, like DOS basically does. The only time DOS should try to access the boot sector (sector 0 on a floppy) is when it's trying to figure out if the media has changed or not, and you can use that as a signal to flush the cache entries for that disk. You could even go a step further and compare the cached sector 0 and the new one to see if the disk has really changed or not, and not flush the cache if it hasn't, but I'm sure that's "too complicated" for you to implement. I can't think of a scenario where that wouldn't solve the problem. The only potential issue I can see is if the disk has an MBR or GPT at sector 0 instead of a boot sector, but that shouldn't ever happen on a floppy. -- View this message in context: http://old.nabble.com/Virtual-floppy-change-problem-with-VirtualBox-tp33859302p33897120.html Sent from the FreeDOS - User mailing list archive at Nabble.com. ------------------------------------------------------------------------------ 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
