Quote: jordigahan and ClawGrip dumped an Olympic Darts 1 PCB from the Spanish company K7 / Kursaal / K7ArabaPlay.
Both the hardware and code for this video dart board are reminiscent of Cuatro en Linea, so the Olympic Darts dump and schematic will help emulate that game. I recently hooked up the I2C EEPROM for both games.
The UM487F "HCGA" video controller was designed for use in PC clones rather than simple Z80-based games like these, but I haven't seen an actual clone motherboard or ISA video card that has one.