From old datasheet system EEPROM,FLASH,512kx8,cmos,DIP,32PIN,PLASTIC 4 Mbit (512 K x 8-bit) 4 Megabit (512 K x 8-bit) cmos 5.0 Volt-only, Uniform Sector Flash Memory
0.5 in Diameter, 200mA Single Deck Rotary Switch From old datasheet system 524288-bit cmos static ram 524288-bit (32768-WORD BY 16-bit) cmos static ram