Altirra 2.6 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 2.6 Test 13 Changelog:
Features added:
- Debugger: Added support for one-shot, grouped, and clear-on-reset breakpoints.
- Debugger: Added support for return tracepoints (bt --).
- Debugger: Added .sprintf command and @ts tokens.
- Debugger: Added @t0-t9 (temporary) and @ra (return address) variables.
- Input: Added support for quick-cycling between a set of input maps.

Download: Altirra 2.6 Test 13
Source: Here