et10+@andrew.cmu.edu (Edmund E. Tsai) (04/08/91)
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?
Thanks.
Ed
*********************************
Edmund Tsai
Phone: (412)268-4602
email: et10+@andrew.cmu.edu
Address: 1000 Morewood Ave , Box 3288
Pittsburgh, PA 15213
*********************************fangchin@elaine54.Stanford.EDU (Chin Fang) (04/09/91)
In article <obzuNeS00WBLQ25V1R@andrew.cmu.edu> 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 > [a possible hardware fix was suggested] I think it also depends on the graphic driver's capability too. I am using a X11R4 X386 server on my 20Mhz non-caching 8 meg system with a SWAN ET4000 SVGA and a 3yrs old NEC Multisync II. I use 832x600 [256colors] All the time and the image is sitting square on where it should be. I don't even need to adjust the knobs. If I want to, I can make the resolution some- thing like 832x610 [256colors] With just a few editing of a driver configuration file. So I am not too sure whether the v-hold problem discussed in this thread is really a monitor or not. Chin Fang Mechanical Engineering Department Stanford University fangchin@leland.stanford.edu PS. I run AT&T SYSV/386 UNIX R3.2 on my box, if this matters
karl@robot.in-berlin.de (Karl-P. Huestegge) (04/11/91)
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