0 wait state 286 was pretty standard affair for 8-10 and some 12MHz gray boxes. Example https://theretroweb.com/motherboard/manual/g2-12mhz-zero-wait-286-turbo-

0 wait state 286 was pretty standard affair for 8-10 and some 12MHz gray boxes. Example https://theretroweb.com/motherboard/manual/g2-12mhz-zero-wait-286-turbo-mainboard-user-s-manual-6047f171c5d15737881271.pdf https://theretroweb.com/motherboard/manual/g2-12mhz-zero-wai... "12MHz/0 wait state with 100ns DRAM." another https://theretroweb.com/chip/documentation/neat-6210302843edf016326545.pdf https://theretroweb.com/chip/documentation/neat-6210302843ed... "The processor can operate at 16MHz with 0.5-0.7 wait state memory accesses, using 100 nsec DRAMs. This is possible through the Page Interleaved memory scheme."