Try lowering the “Freq” (frequency) in the Device Option menu. Some old chips fail at high programming speeds.
. This software is essential for managing the programmer's 48-pin ZIF socket and its support for microcontrollers (MCU), EPROMs, and FLASH memory Software Download & Compatibility Primary Software: is the standard control software for this model Download Location: A direct download link is available via , pointing to a hosted RAR archive containing the software and instructions Supported Systems: Top3100 Universal Programmer Software Download