At 09:48 PM 7/25/2006 +0200, Japeth wrote: > > > > QEMU has never liked CTMOUSE under FreeDOS, and possibly MS-DOS. I don't > > know why. > >when I modify emm386.asm, proc v86_monitor, so that the IF in real-mode is >cleared for all interrupts routed to v86-mode, not just the IRQs, it works >with CTMOUSE in qemu. > >There might be good reasons to clear IF for IRQs only, as it is done in >current source code.
Here's my initial problem with this idea: it works when you get step outside of the Qemu DOS sandbox. Plus it works (or worked) in Bochs, since I remember testing it under Linux a year or two ago when trying to figure out what the heck was going on with CTMOUSE and Qemu. And it only seems to fail with CTMOUSE and not other programs which use interrupts a lot more creatively. (I should check VPC 2004 now and see which side of the fence it falls on). So, is there a real bug normally masked in some way, or an optional behavior, or a situation which only fails in (or due to) a particular virtual environment? And if does only fail in a virtual environment, what effect would changing the behavior have in real/nonvirtual DOS and a bazillion working applications? Changing a long-standing fundamental behavior to fix a single problem in a virtual environment with one program can be worrying. I'd feel more confident about making an immediate change if someone could point to a program or test which fails under a nonvirtual environment due to the IF status, or if they demonstrated widescale failure in a virtual environment. Even better would be a good explanation for why the problem only manifests itself with that specific environment and application. Unless there's a quick answer here by someone with the experience or expertise on the issue, it may take some study to answer the questions to my satisfaction and decide on making your suggested change. ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys -- and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Freedos-devel mailing list Freedos-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/freedos-devel
