I formatted and reinstalled WIN98SE on my Toshiba Satellite 1800-S203-- now the screen display size won't highlight so that it can be adjusted. It is at 640 X 480. I found that I have a "Toshiba internal 1024 X768 panel" -- In device manager, the driver loaded was a "Plug and Play Monitor" -- I tried changing the driver to the "Standard Monitor types" and used as the Model- Laptop display panel (1024 X 768) and nothing changed, but that is where I have left it.
I had downloaded a Trident driver from Toshiba web site and it brought up the full display size-- and showed 2 monitors. I removed it, wanting to do it right. I am very new at this, as you can tell.