27c256 | 4K81H | 68HC11A1 | 68HC11P1 | 68hc24 | 68HC711E9 | 68HC811 | 8255 | A2D | ADC | ADC12138 | Am85C30 | BRCLR | Buffalo | CMOS | EEPROM | EPROM | Ethernet | EVB | EVBU | HC11E1 | HC11E9 | HC711E9 | Horray | ImageCraft | IRQ | Keypad | LCD | MC68HC11D0FN | MC68HC11E1CFU3 | MC68HC11F1 | MC68HC711E9 | MC68HC711E9CFN2 | Microcore11 | Microstamp11 | Minikit | NVRAM | PSD | PSD8xx | PSD9xx | PT1000 | RS232 | RTS | RXD | SPI | SRAM | TXD | Watchdogs | XIRQ

Thank you to everyone who replied to my e-mail about my 27c256 failures. After considering all of the suggestions, and trying quite a few of them, the only thing that was effective was adding a ZIF socket to the board. With the ZIF socket in place, the chips that were misbehaving are now fine. So, it sounds like I just managed to wear down the "corners" of the pins enough to cause an intermittent contact on one (or more) of the pins. Of course, all it takes is one pin..... Thanks again, Brian __________________________________

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