This is the ultimate version of the Willem EPROM programmer. The jumpers and even the 12-dipswitch are replaced with digital switches controled by onboard microcontrollers. The board also incoporates the most commonly used adapters on board, such as PLCC32, FWH, and 28pin, 40 pin PIC sockets. This is also the only Willem programmer which has the support for 6.5V Vpp, thus it truely supports these MCUs, 89C55WD（20K/6.5V, 89C51RC（32K/6.5V). The Vpp is controled by ICs which offer the most accurate voltage within the error margin of 0,05%, thus guarranteeing the accurate and reliable programming of your chips.

The complete package for this Willem programmer pro version includes:

1. Willem EPROM programmer pro version board, PCB version 5.5C;
2. The Latest Windows Software version 0.98D8 and Manual (Electronic Version);
3. DB25 cable for connecting to PC printer port;
4. USB cable (used as power supply cable);
5. A bonus PLCC chip extractor.