AM9128-20PC Static RAM (SRAM) by AMD. Organisation: 2K x 8 Access time: 200nS package: 24-pin (wide) DIP (*) Download AMD AM9128-20PC .pdf datasheet: Status: NOS (New Old Stock) Individually tested memory: YES, .....invasive 7-pass routine. RoHS compliant: no note (*) : these are the early '82 era AMD plastic package with a square indentation next to pin 1 on top surface, for those that want the genuine thing ! As used in early Commodore computers. ***Not cheap auction site fakes***