MdntTrain wrote:
On Nov 9, 9:24 am, Drew <GoggleD...@gmail.com> wrote:
<<The pause/blank screen when the converter switches res and my monitor tries to also sync is a little annoying, when booting my GS i never see the Apple IIGS bit, just GS/OS loading.>> Yeah, I find that annoying too.. I wondered if it's doing that in response to the changing dot clocks coming the IIgs as video modes are switched.. but as its dot sync to the 16mhz super hires mode is imperfect, I'm actually not sure what it's doing. It could just be that the V+H syncs coming from the IIgs are interrupted during mode changes, thus simply requiring the converter to relock onto the 15.7khz signal.
As you noted, the change in dot clock is a likely cause. When the IIgs switches to 16MHz (SHR) mode, the lock circuitry that was happy with 14.3MHz becomes unsatisfied, and so disables video and starts to hunt for a new lock. When it fails to do so, it settles on some sampling frequency and re-enables video conversion. -michael ******** Note new website URL ******** NadaNet and AppleCrate II for Apple II parallel computing! Home page: http://home.comcast.net/~mjmahon/ "The wastebasket is our most important design tool--and it's seriously underused."