actually, after checking the schematics i have it looks like the analog board wants more or less "normal" video. if you do just switch the video signals for testing, remember you need a ground connection as well, and preferably shielded cables with all the grounds connected or you will get reflections which greatly complicates trying to decide what is going on. note that the mac uses twisted pairs for these signals to provide some shielding and a proper impedance for the signals. if anyone wants the schematics email me off list.
"Snook, John R" wrote: ------ > If you want to there is an inverter chip on the analog board that has some unused >inverters, so you could run the video through one of those to make it black on white. > > However when I connected a SE logic board to a Classic analog board I got the same >video as you describe, except the size and position was OK. > > I would try adjusting the analog board first. > > Then experiment with different sense settings to see what that does. > > If you can get the position of the video image fixed (or even if you can't) you >could disconnect the three video wires on your Classic and feed the LC video in and >see what you get. Leaving the Classic intact except the three video wires sidesteps >the PWM question. > I think that if you do this last thing you will get black as black and white as >white, and maybe some of the other problems may be better. > Good work and good luck. ------------ -- "To preserve liberty, it is essential that the whole body of the people always possess arms, and be taught alike, especially when young, how to use them." (Richard Henry Lee, Virginia delegate to the Continental Congress, initiator of the Declaration of Independence, and member of the first Senate, which passed the Bill of Rights.) -- Compact Macs is sponsored by <http://lowendmac.com/>. Support Low End Mac <http://lowendmac.com/lists/support.html> Compact Macs list info: <http://lowendmac.com/lists/compact.shtml> The FAQ: <http://macfaq.org/> --> AOL users, remove "mailto:"; Send list messages to: <mailto:[EMAIL PROTECTED]> To unsubscribe, email: <mailto:[EMAIL PROTECTED]> For digest mode, email: <mailto:[EMAIL PROTECTED]> Subscription questions: <mailto:[EMAIL PROTECTED]> Archive:<http://www.mail-archive.com/compact.macs%40mail.maclaunch.com/> Using a Mac? Free email & more at Applelinks! http://www.applelinks.com
