The original sense pin scheme only supported a few resolutions, mostly wierd ones used by Apple fixed-frequency monitors.
For VGA the closest you can get is the 14" Apple monitor, which is 640x480 but at 66.7Hz... which is 6.8Hz faster than the VGA standard (59.9Hz). I forgot which machine you had, but machines/video cards older than the IIci all have the old sense-pin scheme. The IIsi has the older scheme and the LC has the newer one even though they came out at the same time. The new scheme supports the VGA standard. More importantly, the sense pin scheme is just basically a method of connecting certain pins together on the DB-15 connector to tell the Mac what kind of monitor is plugged into it. So what the adapter is doing is connecting certain pins together to make the Mac put out VGA signals (most likely VGA). If your VGA adapter doesn't have any switches, there's not much you can do about a rolling screen unless you have a V-hold knob. If your VGA adapter DOES have switches you can play with different refresh rates. If it is rolling it means the refresh rate is too fast. Try a lower one. (Although if it's a VGA screen it should work at 59.9Hz, which is what most switch-less adapters set the sense-pins for.) Hope that helps! >From: steve <[EMAIL PROTECTED]> >Reply-To: <[EMAIL PROTECTED]> (Quadlist) >To: <[EMAIL PROTECTED]> (Quadlist) >Subject: Re: Mac to PC VGA adaptor >Date: Sun, 13 Oct 2002 20:39:42 +0100 > >Hi, > How can I set another frequncy setting? The old and nearly unusable >monitor I was using had only one resoution 640 by 480? I haven't spotted a >means to change fq settings in the OS 8.0 I'm using. > > Regards Steve > >At 20:47 12/10/02 -0400, you wrote: > >Steve, > > > >Appears like Vertical Roll, see if your monitor has an external "Vertical >Hold" adjustment knob (there is one inside) or try another frequency >setting. > > > >regards, Robert > > > > >-- >Quadlist is sponsored by <http://lowendmac.com/> and... > > Small Dog Electronics http://www.smalldog.com | Enter To Win A | > -- Canon PowerShot Digital Cameras start at $299 | Free iBook! | > > Support Low End Mac <http://lowendmac.com/lists/support.html> > >Quadlist info: <http://lowendmac.com/lists/quadlist.shtml> >The FAQ: <http://macfaq.org/> >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/quadlist%40mail.maclaunch.com/> > >Using a Mac? Free email & more at Applelinks! http://www.applelinks.com _________________________________________________________________ Join the world�s largest e-mail service with MSN Hotmail. http://www.hotmail.com -- Quadlist is sponsored by <http://lowendmac.com/> and... Small Dog Electronics http://www.smalldog.com | Enter To Win A | -- Canon PowerShot Digital Cameras start at $299 | Free iBook! | Support Low End Mac <http://lowendmac.com/lists/support.html> Quadlist info: <http://lowendmac.com/lists/quadlist.shtml> The FAQ: <http://macfaq.org/> 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/quadlist%40mail.maclaunch.com/> Using a Mac? Free email & more at Applelinks! http://www.applelinks.com
