Type of EPROM for IBM 5160 | Size | Image download | Comment |
---|---|---|---|
27256/27C256 EPROM | 32 KB | Download | See note 2 below. |
W27E257 EEPROM | 32 KB | Download | See notes 2 and 3 below. |
Note 1 | It is possible for a RAM chip to fail in such a way that affects only some of the chip's addresses. Imagine such a chip in bank 0, one that fails at say the 5K address. That would result in the diagnostics 'Check first 2 KB of RAM' test passing. But the diagnostic will report an error later when testing the remainder of RAM. |
Note 2 | Ruud's Diagnostic ROM is actually only 8 KB in size. To create a 32 KB sized image, the 8 KB image was simply quadrupled. Therefore, the 32 KB sized image contains 4 instances of Ruud's Diagnostic ROM code. When the 32 KB sized EPROM is placed in socket U18, it will be the fourth instance that gets executed. (The first three are not used at all.) |
Note 3 | Regarding the programming/writing of an image into the W27E257: Even though the W27E257 is an EEPROM, rather than a 'traditional' EPROM, you will still need an EPROM programmer (or other) to program/write to the W27E257. That is because the IBM 5160 motherboard does not support programming/writing to EEPROM's in its sockets. |