![]() The easiest approach is probably to use a microcontroller to bridge between Hence the project to build one ourselves. To load data you need an EEPROM programmer and like the chips, these devices haveīecome somewhat rare and expensive. The content of which appears on the 8 I/O pins for a total capacity of 32768 These chips tend to be much larger and expensive than their modern serialĬounterparts that have largely replaced them.ġ5 address pins for 2^15 = 32768 addresses. However, since parallel I/O requires lots of pins, In contrast to most newerĮEPROMs they have parallel input and output pins for address and data, making I decided to try and use old EEPROMs for this. That was easy to access on a breadboard with just basic logic components. ![]() Yet, I needed some sort of persistent data storage I had a number of projects in mind that I wanted to do without the use of a
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June 2023
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