tigard

At some point in time, prom programmers were very proprietary and expensive. Today, it's mostly a solved problem for the old chips (TL866 family + minipro[0]), but now chips tend to be soldered rather than socketed, without even some thought in the form of a nearby header. So you'd need a clip for SOP8/WSON/whatever package used (they are cheap on aliexpress). Tigard[1] is a lovely, cheap, useful board for the interfacing. 0. https://gitlab.com/DavidGriffith/minipro 1. https://github.com/tigard-tools/tigard

Vivado, along with expensive adaptors, supports some JTAG dongles that are just FT2232 with an EEPROM that contains USB descriptors that Vivado recognizes and treats as a (some low cost onboard adaptor for Digilent boards, IIRC) supported adapter. https://gist.github.com/rikka0w0/24b58b54473227502fa0334bbe7... If you like FT2232, you’ll love the Tigard board that takes a FT2232H and adds level shifters and is basically as tricked out as you can make a FTDI adapter. https://github.com/tigard-tools/tigard