Anyone have any of these I can't find a datasheet on them. They are 22 pin and the manual only lists them as 256 X 1 ram. The markings on the chips 8023 E36.
I think you might be reading the date code.. if there aren't any other markings on it, there may be some on the bottom of the chip (if its socketed, it would be easy to check). The common 256x1 RAM chip that I know of is a 74ls200/1 (and it's Signetics equivalent), and I think that's only 14 pins.
In the schematic it has 8 22 pin video RAMs too... but they are 256 x 4 and they are listed as an "8020" in the recommended parts list. The schematic shows the pinouts and they match a 93422 RAM.