Its ugliest drawback is that its input pins are not 5V-tolerant. If you "write" a logical 1 on a higher-rated voltage input pin, it will almost always work ("writing" 3.3V on a 5V input is safe because it is somewhat near 65-66% of the required voltage; I expect it to be catched as a logical 1 everytime; "getting" 5V on a 3.3V-rated input pin means that you probably just destroyed it - or the entire board).
Specifications are quite interesting:
- 96 kb RAM vs. 8 kb RAM: you can emulate a full "64k RAM" 8-bit era computer with 32k extra for the operating system;
- 84 MHz clocked SAM3 processor: you can emulate a full 8-bit era computer at native speed... or way faster;
- 512k flash memory: you can store not only the full emulation program, but also some "floppy disks / microdrive cartridges / tapes" as well;
- the 3.3V rail can supply 800mA current: you can add peripherals and even a small screen requiring up to 2.6 watts total.
Yes, if it had 5V-tolerant I/O pins, it would have been a great machine.
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