P51C86-15 Integrated Circuit - DIP28 - Intel

28C64A-15 Integrated Circuit - DIP28 - OKI Semiconductor

M27C256B15F6 Integrated Circuit - DIP28 - SGS Thomson

AT28C64B25PC Integrated Circuit - DIP28 - Atmel

CAT28C256P15 Integrated Circuit - DIP28 - CSI Electronics

M5M27C512AK15 Integrated Circuit - DIP28 - Generic Make

AM27C128-120PC Integrated Circuit - DIP28 - Analog Devices - AMD

M27C256B15XF1 Integrated Circuit - DIP28 - ST Microelectronics - STM