davor

version 4.21 was released mid-march.

You can save the ROM from Altirra. From an Atari 800 profile, select Altirra Basic as the system Basic, then use Attach Special Cartridge->Basic, from the File menu and save the firmware (also from the File menu) The new test version (after the ver4) includes an updated version (1.58, I think).

A very minor issue: The AltirraOS XL/XE boot screen (the Amiga-like "waiting for disk" screen), enabling artifacting, the text looks too blurry. Sorry for being so picky... your software is really well designed.