Mark McDougall wrote:
aiiadict@gmail.com wrote:The apple II screen is refreshed at 60hz. What does a VGA refresh at?There's a range of valid frequencies, but 60Hz is one of them.I've been thinking, there's probably a very simple way to do VGA output with something as small as a PIC/AVR micro. You don't even need a frame buffer to do simple VGA output, just a line buffer (or two).
Exactly. This is usually called a "scan doubler"--in this case one specialized to the Apple II video. -michael Music synthesis for 8-bit Apple II's! Home page: http://members.aol.com/MJMahon/ "The wastebasket is our most important design tool--and it is seriously underused."