foone🏳️⚧️ on Twitter: "The main chip is a UM6845R. That's a UMC clone of the classic Motorola/Hitachi 6845 Display Controller. It was used in the BBC Micro, Amstrad CPC, and the PC's
PC Expansion-Card Gallery - Number 9 Computer Company
CRTC operation
MC6845 Datasheet(PDF) - Motorola, Inc
Motorola 6845 | Semantic Scholar
Some Pleasing Experiments In 8-Bit Video Cards | Hackaday
Motorola 6845 | Semantic Scholar
Some Pleasing Experiments In 8-Bit Video Cards | Hackaday
MC6845P Motorola Video Display Controller IC 6845 - Pull for sale online | eBay
Motorola 6845 | Semantic Scholar
MC6845P CRT Video Controller Motorola online kaufen | eBay
CBM 8296-D - Erste Wiederbelebung seit 14 Jahren? - Seite 4 - Peripheriegeräte - VzEkC e. V.