On Sat, 12 Mar 2016 10:52:38 +0100, Peter Graf wrote: > Derek Stewart wrote: > .../... > > If the Jamma GBS8220 board is connected to the Q60 VGA port, this does > > make the display better, but still needs a little tweaking to get full > > screen display.
I got no result at all (no sync) with a GBS8220 v3, and no amount of sync signals tweaking resulted in anything for me... :-( > > Maybe solution would be to signal condition the VGA signal coming out > > of the Q60 VGA connector. > > > > This is also difficult, but non-destructive on the Q60 board. Since most of the work of a converter is to reconstitute the pixel clock and deduce the resolution to also reconstitute proper line and frame clocks, it would be indeed easier if we could get all these clock signals right from the Q60 (or any other QL compatible: I'm thinking about the Q40, the Thor XVI, the QL itself...), especially knowing the exact format of the picture (resolution, number of colours). The "converter" would then just have to store a full frame (or two) in memory and output them back as a SVGA signal. > The problem with most VGA converters is that they detect 800x600 from > the Q60's signal. I'm sure that in many cases, 1024x512 would be > possible if the converter just knew about the existence of this mode. Possibly, depending whether the converter is using "standard" chips (designed for standard EGA/*VGA resolutions) or not... > Maybe if we can find someone who has connections to a smaller converter > manufacturer, they would do a change if we commit to buy a certain > number of devices. That would be great, yes... Thierry. _______________________________________________ QL-Users Mailing List
