So as the title says, My Viewsonic PF790's EDID info appears to be corrupt, Windows 98 defaults to 640x480 without any way of changing it outside Powerstrip, XP, 7 and 11 all show up as an "analog monitor" and have no monitor info or settings present. Changing the vga cable does nothing to fix it.
Any idea how to fix this?
EDID is normally housed in a small i2c rom. You can try to find that chip and reflash it. Or you can try to intercept the ddc wires and have a microcontroller fake things (which is what some hdmi edid emulators do).
DDC/EDID is a comparatively new standard. It only appeared during the time PCI graphics cards were a thing, the earliest cards i have that do edid are S3 Trio64v+, or Tseng ET6000. Around the same time, blue VGA connectors appeared to show that the graphics cards were DDC/EDID capable.
Back in the day, people got monitor specific .inf files and installed those. So perhaps that is a solution for your win98 installation.
libv wrote on 2022-04-06, 06:50:EDID is normally housed in a small i2c rom. You can try to find that chip and reflash it. Or you can try to intercept the ddc wires and have a microcontroller fake things (which is what some hdmi edid emulators do).
DDC/EDID is a comparatively new standard. It only appeared during the time PCI graphics cards were a thing, the earliest cards i have that do edid are S3 Trio64v+, or Tseng ET6000. Around the same time, blue VGA connectors appeared to show that the graphics cards were DDC/EDID capable.
Back in the day, people got monitor specific .inf files and installed those. So perhaps that is a solution for your win98 installation.
Thanks for the advise on the monitor inf, I found one that was marked for a Geforce2 but it works, only downside is I'm not getting 85hz @ 1024x768 (only 75hz) but modifying the inf might fix it.
mastergamma12 wrote on 2022-04-06, 07:20:libv wrote on 2022-04-06, 06:50:EDID is normally housed in a small i2c rom. You can try to find that chip and reflash it. Or you can try to intercept the ddc wires and have a microcontroller fake things (which is what some hdmi edid emulators do).
DDC/EDID is a comparatively new standard. It only appeared during the time PCI graphics cards were a thing, the earliest cards i have that do edid are S3 Trio64v+, or Tseng ET6000. Around the same time, blue VGA connectors appeared to show that the graphics cards were DDC/EDID capable.
Back in the day, people got monitor specific .inf files and installed those. So perhaps that is a solution for your win98 installation.
Thanks for the advise on the monitor inf, I found one that was marked for a Geforce2 but it works, only downside is I'm not getting 85hz @ 1024x768 (only 75hz) but modifying the inf might fix it.
HZTool is on my "must have tools" for W9x systems:
https://web.archive.org/web/20080112121741/ht … .spray.se/doxx/
bofh.fromhell wrote on 2022-04-13, 20:52:mastergamma12 wrote on 2022-04-06, 07:20:libv wrote on 2022-04-06, 06:50:EDID is normally housed in a small i2c rom. You can try to find that chip and reflash it. Or you can try to intercept the ddc wires and have a microcontroller fake things (which is what some hdmi edid emulators do).
DDC/EDID is a comparatively new standard. It only appeared during the time PCI graphics cards were a thing, the earliest cards i have that do edid are S3 Trio64v+, or Tseng ET6000. Around the same time, blue VGA connectors appeared to show that the graphics cards were DDC/EDID capable.
Back in the day, people got monitor specific .inf files and installed those. So perhaps that is a solution for your win98 installation.
Thanks for the advise on the monitor inf, I found one that was marked for a Geforce2 but it works, only downside is I'm not getting 85hz @ 1024x768 (only 75hz) but modifying the inf might fix it.
HZTool is on my "must have tools" for W9x systems:
https://web.archive.org/web/20080112121741/ht … .spray.se/doxx/
Dude, That did the trick 😁 😁, THANK YOU
