- better 8250 emulation;
- fake vertical retrace bit in Input Status #1 register
(this was lost in the VGA emu rewrite).
Submitted by: Igor Serikov <bt@turtle.pangeatech.com>
- emulate VGA read mode 0,
- emulate VGA write mode 1,
- minor cleanup.
Protel's Easytrax, a free PCB layout program, almost runs now; there are
still some problems with the keyboard emulation, but the graphics are fine
(albeit a bit slow).
- slightly more accurate VGA hardware emulation;
- more int 10 functions, especially wrt to palette handling;
- first shot at graphics support;
- mode switching.
Bugs:
- graphics too slow;
- only 16 color modes work for now;
- works only under X, and only with 16 bit TrueColor visuals;
- far from being genuinely useful (I can play an old EGA game now, though
(mahjongg.exe)).
Also, the code has been cleaned up a bit (more to come in a separate commit).
