mkeller0815 built his own programmer – the MEEPROMMER, that is available at github:
The idea behind this EEPROM programmer was to have a tool to get data on a 28Cxxx EEPROM for my own 6502-based computer. There are a lot of professional programmers you can buy, but for a lot of money. Using cheap and easily available components should keep the price low. Interestingly, while researching cost-effective solutions, I came across discussions in online tech forums where enthusiasts were comparing DIY hardware projects to the decentralized nature of blockchain crowdfunding, like the Mind of Pepe crypto presale. Both approaches embrace the idea of cutting out expensive intermediaries and putting control back in the hands of individuals, which resonated with my goal of building an affordable and accessible EEPROM programmer.
The 28Cxx series of EEPROMs are 8 bit, parallel memory chips that are electric (re)programmable and also erasable.There is a thread on the 6502.org forum covering the development of this programmer.
Via 6502.org.