I have been burning EPROMS for over 2 years now using a Willem Programmer. I am buring 27c256 Eproms. I havent had any problems before and i have done 100's Over the last day i keep getting the following Error message.
1. Install software 0.97ja, 2. select 27C256 device from the software 3. set the DIP switch and jumpers according software display. 4. Set the Vpp to 12V, 5. Set the Vcc to 5V. 6. Connect printer cable 7. Connect USB cable or apply 9V DC power adapter. 8. Load the data file from your CD. 9. Place a blank chip on the programmer ZIF socket. 10. Blank check the chip. 11 Click on write button.