busa.s
- reduced code within function endOfFrame, now only used for bail out code
blit.c/bus.c
- made some variables signed (needed for endOfFrame conversion)
- replaced all calls to endOfFrame to endOfFrameC
- converted assembly function endOfFrame (except bail out code)
cpu.c
- made some variables signed (needed for endOfFrame conversion)
draw.c
- removed all calls to instruction pushad and popad
- added (but disabled) code for full 2x2 pixel scaling hack within function drawEndOfFramePreC
GUI_general
- adjusted position/title of buttons for fast disk swap
- made sound on/off invisible (title of button is "turbo")