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Ezo, Thank you for the response. Below is the programmer I have and the adapter. I set the jumper to default and the VPP to 12.5 (it says 12.5 on mine, 12.7?) and the Vcc is at 5. On the adapter the 3 wires. Should the Vpp on adapter go to Vpp on ICSP of main board. And then A19,A20 to Expand Jumper...

Hey guys, I just got a Willem Programmer and I also bought an Adapter for 27C160 Eproms. The programmer came with a disc that has a lot of info on how to program different eproms but it doesn't show at all how to use the adapters. I think I had it hooked up correctly with A 19,20,21 all going to the...