I am wondering if anyone has any PDF's on pic programming. If microchip ever had these (as suggested by AN910) I can't find them anywhere on their site. I am using a Linux program ( at ) and similar parallel programmer with the exception that for the buffers I used standard
4001s ( too slow?) and the VPP signal drives NPN with 1.1K to 13ish V and VPP pin also grounded through 10K resulting in 12.7V during programming.This seams to be able to program 16F628A ( when I finally found a blank one), But I can't seam to erase one.
The software seams to have been last touched in 98 and nowhere it seams to mention the A version so I am wondering if the 'A's' are not different. There is a provision to add additional bits to the '0x08' command possibly depending on the pic. Actually I have not looked in the config, if anything else besides 0 is used for the other
2 pics (16F87x and 16F84) around which the development revolved.. hmmmm..In any case I'd love too look at some concrete DOCS.
Thanks, Sam.