Linards Ticmanis wrote:
David Wilson schrieb:But my computer is a II+, not a IIe. What is the difference between NTSC II+ motherboard and PAL II+ motherboard beyond the jumpers and the quartz?Apart from the jumpers and the main oscillator frequency, nothing. Making the changes you have done should return the board to NTSC functionality. Have you tried tweaking the Color Tone variable capacitor (C3)?Hello David, Yes, I did. Didn't produce any visible change whatever. That capacitor modifies the color burst phase, not the phase of the visible picture itself, right?
That's right. And it doesn't modify the *frequency* at all, so it would not affect detection of the color burst. I see two possibilities--1) the 14MHz crystal you installed is just enough out of tolerance that the monitor does not recognize the burst as a color burst, or 2) the monitor is applying some strict criterion to the video signal that the Apple does not conform to. (This is more of a problem with monitors that use digital decoding.) -michael New, faster SUDOKU v2.0 solver for Apple II's! Home page: http://members.aol.com/MJMahon/ "The wastebasket is our most important design tool--and it's seriously underused."