Altirra 2.1 Test 5 is released. Altirra is an Atari 8 bit Emulator on the Windows/DOS platform. Altirra emulates several models of the 8-bit Atari computers. This includes the the 800, 800XL, and 130XE versions. It has a lot of options, and compatibility is decent especially given the emulator's early stages. It also supports some copy protected games properly in emulation.

Altirra 2.1 Test 5 Changelog:

bugs fixed - Fixed startup crash on Sandy Bridge CPUs on Windows XP.

Download: Altirra 2.1 Test 5
Source: Here