If you are reading this before buying a programmer, consider:
The Top3000 is still fine for legacy EPROM/EEPROM work, but the software is aging. Top3000 Universal Programmer Software Download For
Before downloading, check your PCB or case sticker. There are two main variants: If you are reading this before buying a
Most software labelled “Top3000” also works for Top3100, Top2048, and Top853 (with limited device lists). The Top3000 is still fine for legacy EPROM/EEPROM
Universal programmers apply voltages to specific pins. A wrong selection can fry a chip instantly.
Before downloading, look closely at your device. While the name "Top3000" is common, there are hardware variations. Using the wrong software firmware can cause communication errors.