Altirra 2.1 Test 13 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 13 Changelog:

features added BASIC programs can now be booted. Fast boot option now accelerates timeouts for powered down disk drives. Disk: Accurate disk timing prediction is now preserved when burst I/O transfers are enabled. Display: Added CIO intercept based enhanced text mode. Bugs Fixed: Display: Added CIO intercept based enhanced text mode.

Download: Altirra 2.1 Test 13
Source: Here