>. I recall reading here that some homemade > programmers didn't work with such an adapter. The reason they dont work in some is that they may not have the full voltage swing that some programmers need for Vpp. And some of them don't allow the Tx line to be held in the state that the programmer needs to get the power from it that it uses. With programmers that use the serial port in a "correct" manner, with Tx transmitting, Rx recieving, and the handshake lines being just that, the USB-Serial adaptors *should* work. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist