The very impressively named COMX World Enterprises Ltd were a Hong Kong company who seemingly had an idea
for a home micro that eschewed the familiar processors like the Z80 and MOS 6502, and instead went for the RCA CDP1802 which is better
known these days as the processor in the Galileo spacecraft. Back then it was one of the first CMOS processors and had been used
in kit machines such as the COSMAC ELF.
The original machine was the COMX-35 (which I still don't have), a 32K colour machine
that hooked up to your TV and let you type in BASIC programs on the quite nice calculator type keyboard. Standard cassette leads
let you save and load with tapes. The machine also had a built-in joystick, one of not many at the time.
The combination of the CDP1869 and CDP1870 video chips only allowed text displays, but the character
set could be redefined to simulate a hi-res display.
There was one successor to the COMX-35 which was this machine here, the PC1. It's the same as its
predecessor but with a slightly refreshed motherboard with a better layout, white plastic case and a better keyboard. So far
we've learned that these machines ended up almost exclusively in Chinese schools which is where this one came from - check
the Chinese PAT testing label on the back.