Hi, I have some ROM chips that I would like to dump. They are 8k mask roms. This isn't something I have a lot of experience with. For some mainstream chips, there are turnkey solutions, but the chips I have are not mainstream. I believe I have identified one of the chips I want to dump as a General Instrument chip from the 9864 family and have a data sheet for it (though I am not 100% certain because there are some minor differences), but I'm not sure what to do next. It's not a chip that shows up on any of the EEPROM programmers that I own, so I believe I am faced with building a custom device. I've heard that the Arduino Mega is a good choice for this, so I've ordered one of those, but I'm a little apprehensive about next steps. In theory it seems simple; figure out the required voltages, give the chip power and ground and a clock, then send in address requests and read the resulting data. But I'm aware that there's a lot more to it than that.
Any tips/advice for a newbie?