Altirra 2.5 Test 26 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. Altirra is quite matured now, and IMO, the best Atari Emu currently! It also supports some copy protected games properly in emulation.

Altirra 2.5 Test 26 Changelog:

features added - Cassette: Tape control UI now has a waveform graph. - Cassette: Added support for FSK blocks in .cas files. bugs fixed - Cartridge: Fixed swapped 5200 two-chip and one-chip modes. - Debugger: Fixed infinite loop bug in static trace (st) command. - Disk Explorer: SDFS directory entries are now reused properly. - Disk Explorer: SDFS sparse files are now supported.

Download: Altirra 2.5 Test 26
Source: Here