It would be an excellent demonstration of Monotron's (and indeed Rust's) portability if there was an option to compile it for the STM32F3 Discovery. The STM32F3 has 256 KiB Flash and 48 KiB RAM (a Monotron 48K!) and a 72 MHz clock speed, which would give a VGA resolution of 800 x 600 @ 56 Hz or 640 x 480 @ 85 Hz - for compatibility the former would be better, but frame-locked games would run a little slower.
It would be an excellent demonstration of Monotron's (and indeed Rust's) portability if there was an option to compile it for the STM32F3 Discovery. The STM32F3 has 256 KiB Flash and 48 KiB RAM (a Monotron 48K!) and a 72 MHz clock speed, which would give a VGA resolution of 800 x 600 @ 56 Hz or 640 x 480 @ 85 Hz - for compatibility the former would be better, but frame-locked games would run a little slower.