I have failed yet again getting TLVP to work... I'm going to skip right to the end of what Byron wrote: > One last caveat: The schematic as drawn doesn't work with the INTRC and INTMCLR > because it requires a power cycle to start programming mode. You have to use > the schematic listed below the main TLVP schematic for that configuration. Let's just pretend that I'm much more of a programmer then an EE and INTRC and INTMCLR aren't in my vocabulary yet. Is that the ICSP link? I skipped over that because I wasn't looking for an in Circuit yet. Anyway, I'll try that schematic out since it specifically says 16F62x... As far as testing goes... I have verified with a simple logic tester under FPP that I can switch the parallel ports, but I was going to bring up the data sheet on the 74HCT573 to see what's going where and where to trace it, FPP still fails to program. Using picprg2.3d, on the test page: Vpp control pin # : +[05] off Vdd control pin # : +[04] off PGM control pin # : +[06] off Clock pin # : +[03] off Data to PIC pin # : +[02] off Data from PIC pin # : -[10] off If D0->Q0, D1->Q1 then I should change those pins to be: Vpp control pin # : +[05] off Vdd control pin # : +[06] off ? PGM control pin # : +[04] off ? Clock pin # : +[03] off Data to PIC pin # : +[02] off Data from PIC pin # : -[10] off Okay, I think it's clear. The "ICSP" schematic uses pin 6 to reset power to the pic, and your "one last caveat" should be taken more seriously then I thought. Anyway, I'll give it one more shot. > At this point you should be done. Test in picprg2.3d by simply inserting a > chip into the programming socket and running picprg2.3d. The first thing > it does is autodetect the chip inserted. So if the main page comes up listing > the 16F628 as the installed chip, then you know that all of the pins of the > programmer are correctly configured and that the chip is in LVP mode. Still haven't had it autodetect... But I'm working away on it... -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.