At the moment, emulator is very basic: 

• 6502 CPU emulation (without timing)
• very basic TIA (WSYNC and COLUBK is handled)
• memory mapping
• 4K rom cartridges linked into the firmware
• NTSC color palette and screen

The kernel which is linked-in is taken from this great Atari tutorials: https://www.randomterrain.com/atari-2600-memories-tutorial-andrew-davie-08.html, this is very basic program which just draws color stripes. But it works! :)

The next steps for this project:

• implement instructions timing (for TIA to be aware of clock pixels)
• implement sprites and TIA registers
• PIA registers
• input controls
• sound
• proper storage of ROMs on badge flash

So, long journey ahead!