DOSBox 0.70

• Speed up the dynamic cpu core (certain games get much faster).
• Add a dynamic fpu on x86 hosts.
• Improve the cycle guessing code (and make it default).
• Better and more configurable joystick support.
• Improve the image and fat drives.
• Add nullmodem emulation.
• Various win 3.x enhanchments (video/audio/ems/win32s).
• Improve CDROM detection and support.
• Speed up the screen drawing code.
• Add support for different keyboard layouts.
• Various fixes to the (C/E/V)GA emulation.
• Extend and improve all types of emulated memory. (umb/ems/xms)
• Dynamic core should work on Intel Macs.
• Various timer related fixes.
• Added a few more graphic scalers.

http://dosbox.sourceforge.net/