CD-ROM set to host drive no longer gets reset to empty;
The CD audio thread initializer now ignores the mute status of the drives;
CD-ROM IOCTL audio handler is now more thread-safe;
Fixed CD-ROM image audio;
Added more sanity checks to memory read/write code in 808x.c;
Initial settings are now sane again.
Fixed all the reported bugs regarding the Settings dialog;
MIDI out device is now no longer reset to 0 after hard reset;
Removed all vestiges of the old disk activity flash;
The configuration file is no longer saved when it shouldn't be;
Redone the status bar icon updating so it is only done in win.c;
Made sure all variables in ibm.h are extern;
A lot of other bugfixes;
Added Mouse Systems Mouse emulation (patch from TheCollector1995);
Added IBM PS/1 Model 2133 (486) emulation (patch from TheCollector1995);
Tweaked the CPU dynamic recompiler cycle periods - 486SX 33 and 486DX 33 now work;
Increased compatibility with configuration files from before the previous commit.
Applied the mainline PCem slight CPU emulation speedup commit;
Added emulation of removable SCSI hard disks;
CD-ROM image handler now uses C FILE's (with the 64-bit size calls) instead of C++ iostreams, ISO images bigger than 2 GB should work properly again;
Split RLL/ESDI and XT IDE disks to their own bus types;
Turned status bar pane meaning and hard disks and CD-ROM BUS numbers to #define's;
Other miscellaneous cleanups.
Temporarily reverted serial port and serial mouse code back to the old one until the new code is fixed;
Fixed nvr_path handling - the NVR path no longer gets messed up at hard reset.
