Hello Jerome,
Second… I really haven’t looked into this one at all. But, I think it would be possible to use Core Boot, SeaBios or something else to provide Legacy BIOS support ourselves on UEFI only systems. This would be a good deal of work. It also still leaves the problem of sound drivers and other hardware support. This might also require some thin hardware emulation layer. But, it should be doable.
About this particular direction: (1) One problem with SeaBIOS --- as it now stands --- is that it uses a very specific memory layout, and the precise addresses of all the base memory areas that it needs to are all fixed at build time. I have been tinkering with the SeaBIOS code and trying to see if I can get it to load in RAM rather than ROM, and possibly get parts of it to go into extended memory (https://github.com/tkchia/seabiosify), but this is definitely non-trivial. (And, it is possible that I am doing it all wrong...) One attractive thing about the SeaBIOS code is that it seems to include support for USB, including USB keyboards. (2) I have had some success meanwhile in getting a UEFI program to look for legacy option ROMs (e.g. for VGA) in the system firmware, and bring them up --- see https://github.com/tkchia/biefircate . Admittedly, this only really works on systems that still have some degree of support for legacy APIs. (3) So I guess yes, this general direction will almost certainly be a good deal of work, and we will probably need all the help we can get. Thank you! -- https://gitlab.com/tkchia :: https://github.com/tkchia _______________________________________________ Freedos-devel mailing list Freedos-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/freedos-devel
