Yesterday I went for a quick fix to incorporate my own text in the PIC12F683 of the pico OSD.
Used the hex editor WinPic800 to change existing text to new text.
I would not call this programming, it's just changing ASCII hex codes. Anyway, the result looked ok. My callsign, QTH locator and elapsed time come in view superimposed on a PAL video signal (e.g. from camera, DVD player)
TV screen 1
TV screen 2
I am considering to download Microchip's development environment MPLAB IDE and a trial version of Hi-Techs C-compiler for small PICs to try some real programming. Four 2K Eeprom PICs 12F683 have already been ordered from eBay (total of $3.00 incl. shipping from China :-) ).
Hope to do some testing coming weekend with a small ATV transmitter (100 mW) and biquad antenna. Coming period I won't have much time for the hobby since the end of my holiday is approaching and the QRL starts to pull.