[SeaBIOS] PS/2 mouse emulation problems

[Natalia Portillo]

Ok so in resume we have the following PS/2 mouse bugs:

NeXTStep and OpenStep PS/2 driver receives no movement at all from the  
mouse (Darwin PS/2 driver seems to be made from scratch so no helpful  
here).
MS-DOS Mouse driver hangs the whole machine.
Windows Me Setup mouse driver receives no movement at all from the  
mouse.
Old XFree86 PS/2 mouse driver receives no movement at all from  
standard protocols (PS/2, IMPS/2) or random movements (Microsoft).
Hydrogen OS mouse driver does not work.

While the NeXTStep PS/2 bug is known from QEMU 0.7.0 (which used Bochs  
BIOS), the other ones are new (as far as I know) so they may be or may  
not be caused by SeaBIOS.