Yep, that is correct. Due to it, I had to recompile my own OpenWatcom build using a different extender for runtime to continue using it (which is fine). I also continue investigating the root cause of that limitation. Just spoke to rEFInd developer to assess his opinion. Seems that he shares one of the comments from this thread, that there is most likely a limitation of CSM/BIOS implementation in Apple's own EFI implementation of the Legacy mode.
But as this is nothing you can't go around with, it's not a show stopper to me to continue testing the environment. To wrap this up I wanted to thank you for identifying the direction for further investigation (keyboard controller with limited BIOS/CSM compatibility on the platform and a bug/trigger in DOS4GW that is generating the crash + error as the final outcome). I'm instantly glad that I've joined the group. Very competent and quick feedback that helped me keep the problem analysis narrow. Thank you, /h1 On Sun, Nov 15, 2020 at 6:23 AM TK Chia <u1049321...@caramail.com> wrote: > Hello Ralf Quint, > > > I am not sure if you guys all missed a previous post where I said I > > found a reference that there are issues with some SMM BIOS > > implementations, providing legacy USB support (for keyboard and mice) > > and software that is trying to switch in "long mode" (which also might > > be used by some memory managers). > > Which could simply mean that this no-so-PC BIOS in that Mac just isn't > > up to snuff for these kind of things... > > Well, we do have some detailed information about this particular error. > Namely, there is a message saying "DOS/16M: [26] 8042 timeout", and > using a different DOS extender or pre-loading a DPMI host seems to work > around it. > > Thank you! > > -- > https://github.com/tkchia > > > _______________________________________________ > Freedos-user mailing list > Freedos-user@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/freedos-user >
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