27C256-25 Integrated Circuit - DIP28M - Intel

27C256-10 Integrated Circuit - DIP28M - Texas Instruments

27C256-20 Integrated Circuit - DIP28M - Intel

M27C512-12F1 Integrated Circuit - DIP28M - ST Microelectronics - STM

27C512-10 Integrated Circuit - DIP28M - Texas Instruments

27C512-12 Integrated Circuit - DIP28M - Texas Instruments

27C64-15 Integrated Circuit - DIP28M - Generic Make

27C512-15 Integrated Circuit - DIP28M - Texas Instruments