On Wed, 15 Sep 2010 14:17:46 +0200, Peter wrote: > Phil Kett wrote: > > > There are devices available that will take a scart RGB signal and > > convert it so that it will work on a modern SVGA or LCD monitor. > > > > Here's one from Maplins. > > http://www.maplin.co.uk/Module.aspx?ModuleNo=217685 > > Have you actually tried with a QL? > > My experience with similar converters: > > - Part of the 512x256 screen is cut off > - Screen sometimes "jumps" vertically > > Not being able to connect the QL to a modern monitor is a major problem. > Sometimes I even considered to build a QL video card to overcome this.
None of the converters I could find on the market can display properly a QL screen (both 512x256 and 256x256) on a VGA screen... they either completly fail to sync the display, or they interpolate and sample each line in 640 pixels, which distorts unevenly both the QL pixels and colors, making any text unreadable. The definitive solution would be a programmable converter, able to rebuild the pixel clock from both the VSYNC signal and the actual number of pixels per line of the QL (counting blanking time pixels too), and then to sample the video signal from this rebuilt pixel clock. The samples would then have to be stored in a memory, and each frame would have to be centered in a 600x350 or 640x480 VGA picture. This would be doable by a engineer in electronics... Thierry. _______________________________________________ QL-Users Mailing List http://www.q-v-d.demon.co.uk/smsqe.htm
