I keep throwing "COMX-35" in to a search bar at least fortnightly, hoping to stumble across new homebrew hardware or games, news etc..... searches usually don't show anything new but I did dig a bit deeper on a vague link, which ended up being a nice article at chiptune.cafe, discussing the CDP1869 CDP1870 / VIS
"The CDP1869 has two channels available: one, a square wave tone with an impressive range of 8 octaves, and the other a white noise generator that has 8 accessible pitches. With these, they had volume control over 16 steps."