* WIP Adding Atari800 side of things
* WIP Migrated some functionality from .sv to here
* WIP XEX file loading works, clean-ups
* WIP UART/SIO interface beginning
* WIP Adding Atari800 drive emulator
* WIP First version of the drive emulator working with ATR and XEX files
* WIP ATX files are working
* WIP HDD is now mounted separately
* WIP PBI/HDD is working too
* Cleaning up and adding supporting Atari ASM files
* Updated versioning information in the Atari800 FW
* WIP Adding support for the Atari 5200 core
* Atari 5200 support complete
* Atari800: fixed SIO timing bugs
* Atari800: sorting out SIO timing issues still
* Atari800: eliminate OSD lock up possibilities
* Atari800: Improved XEX loader
deb43cd870