PCem v0.5

Changes since v0.4x:

- More games work, eg Tyrian, Jazz Jackrabbit, Transport Tycoon
- New (bad) cache emulation. Should make 386/486 speeds a bit more realistic
- 486 speeds between 50 and 120 MHz added. The fastest are only for people with stupidly quick
machines.
- Fixed CMOS corruption bug
- SB Pro v2 and SB16 emulation
- GUS improvements, MIDI playback now better
- CD-ROM emulation (use OAKCDROM.SYS)
- Re-added CGA composite emulation
- 8088/8086 timing tweaks
- Fixed bugs in LLDT/LIDT/LGDT/LTR
- VM flag no longer stored with PUSHFD
- Fixed bug in SIDT/SGDT - no more ´hardware not recognized´ from Borland DPMI
- HLT now priviledged
- Fixed unused bits in FLAGS register
- Fixed read/write across page boundary
- Many bug fixes in exception handling
- REP INSx now uses correct segment
- DIV.D fixed, fixes Terminal Velocity, Pro Pinball etc
- Loads of other fixes