Pretty sure this was released initially as a Samco piece of hardware, although Bruce Gordon later made them via SamTek

References page

zx spectrum emulator that runs zx spectrum code at the full 6MHz see velesoft website and youtube for videos of freescape running at the full 6MHz



it's listed on world of sam as one Meg so I've added the links there pretty revolutionary getting zx spectrum software to run at full 6mhz n think what she could do to Sam software apols 4 being a bit off topic