IC MEMORY DRAM PAGE MODE 64KX4 MOS DIP-18
21/TUBEDC 8850
IC Fast Page DRAM, 256KX4, 70ns, CMOS, DIP-20 OBSOLETE TMS44C256-70NL / TMS44C256-80NL
tubeDC 9215

IC CMOS SRAM 256K bit 32Kx8 15nS DIP-28 Socket PULLS = CY7C199
13/TUBEDC 9421

IC CMOS SRAM 256K bit 32Kx8 25nS DIP-28 Socket PULLS
13/TUBEDC 91

IC CMOS SRAM 256K bit 32Kx8 35nS DIP-28 Socket PULLS = CY7C199
13/TUBEDC 91 +/92/93