F12

[cebelcher]

Hitting F12 seems to freeze the system

[RetroSilicon]

F12 currently freezes the system because it activates the On-Screen Display (OSD) in FPGA Companion, which isn’t used by the ATARI core — once entered, OSD mode never exits.

A modified version of FPGA Companion (without the special F12 handling) will fix this.
I’m working on that version, tailored for my cores (ATARI and ZX Spectrum), and will update this issue once it’s released.