Newsgroups: comp.sys.ibm.pc.hardware
Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!caen!ox.com!math.fu-berlin.de!fub!geminix.in-berlin.de!robot!karl
From: karl@robot.in-berlin.de (Karl-P. Huestegge)
Subject: Re: NEC multisync
Organization: K.-P. Huestegge, Sytemanalyse und Beratung, Berlin
Date: Wed, 10 Apr 91 19:15:12 GMT
Message-ID: <1991Apr10.191512.9415@robot.in-berlin.de>
References: <obzuNeS00WBLQ25V1R@andrew.cmu.edu>
Lines: 26

et10+@andrew.cmu.edu (Edmund E. Tsai) writes:

>The original Multisync can handle the 800x600 graphics, but the only
>problem is that the monitor has problem with v-hold

>Someone, has suggested the following fix :

>    Wire a potentiomenter in series with the v-hold and a switch in
>parallel with the pot.
>    Then, adjust the pot so that when the switch is off, the monitor
>displays fine in non-super vga, then turn on and adjust for super vga.

>Anybody out there have suggestions on how to accomplish this without
>manual labor?

Shouldn't be too difficult if you replace the switch with a relay.
Drive a Condensator with the VSYNC signal and compare the voltage
at the condensator with a comparator (opamp), which finally switches
the relay. Would cost approximately 2$.

Sorry - I don't have a Multisync. I would have tried.

-- 
Karl-Peter Huestegge                            karl@robot.in-berlin.de
Berlin Friedenau                                Bus: 2,25,48,81,85
U-Net: Bhf.F.Wilh.Pl.                           ..unido!fub!geminix!robot!karl