Spectrum 128k+ to Philips CM8833-II

Hi, I just wired up my Spectrum 128k+ to a Philip CM8833-II monitor via RGB. I connected it as follows: Speccy - Monitor Ground - Ground Red - Red Green - Green Blue - Blue VSync - VSync Bright - Intensity And that's all that was needed for a stable picture. I thought the monitor might also need a horizontal sync, but it seems to work without (I read that I could connect the composite from the spectrum to provide a horizontal sync, but it was not needed, and didn't seem to work either) As others have pointed out before on the group, bright black, is lighter over RGB and not black like it is on a tv. However, another thing I have on my monitor is that yellow, is more like brown, although bright yellow is yellow. If I switch the monitor to analogue mode, the picture still shows, but the brights are lost (Intensity becomes fast blanking on the monitor input), and the picture becomes overall brighter. I didn't expect it to work at all if I pressed that switch. Anyway. Nice clear picture, even if the brown yellow is a little odd. If I turn brightness up to full, it becomes almost yellow, but then everything else is far too bright. Any ideas if it's possible to fix the brown ? Best Regards Jools

fuzzix wrote: > Jools Smyth wrote: >> However, another thing I have on my monitor is that yellow, is more >> like brown, although bright yellow is yellow. > > Gee, must be a little like using a C64... ;) Not quite, as the sound is still crap! *hides*

Jools Smyth wrote: > Hi, > > I just wired up my Spectrum 128k+ to a Philip CM8833-II monitor via > RGB. > > I connected it as follows: > > Speccy - Monitor > > Ground - Ground > Red - Red > Green - Green > Blue - Blue > VSync - VSync > Bright - Intensity > > And that's all that was needed for a stable picture. I thought the > monitor might also need a horizontal sync, but it seems to work > without (I read that I could connect the composite from the spectrum > to provide a horizontal sync, but it was not needed, and didn't seem > to work either) > > As others have pointed out before on the group, bright black, is > lighter over RGB and not black like it is on a tv. However, another > thing I have on my monitor is that yellow, is more like brown, > although bright yellow is yellow. > > If I switch the monitor to analogue mode, the picture still shows, > but the brights are lost (Intensity becomes fast blanking on the > monitor input), and the picture becomes overall brighter. I didn't > expect it to work at all if I pressed that switch. > > Anyway. Nice clear picture, even if the brown yellow is a little odd. > If I turn brightness up to full, it becomes almost yellow, but then > everything else is far too bright. Any ideas if it's possible to fix > the brown ? > > Best Regards > > Jools Hi! Having in good rememberance that Philips. Hmmm, I know about an YuV-to-RGBsync. converter for the Speccy 16/48K, having 4 potis to adjust R, G, B, and sync. (I never heard about Bright/Intensity...) Have you tried to leave Bright/Intensity unconnected. Just R, G, B and Sync. Make xtra (seperate) ground wires for R G B and sync... (standard SCART) Best regards, Daniel Mandic

Sinclair PC200 512k (V1.5) on 8 December 2006 Loading Jools Smyth <buzz@removemeexotica.org.uk>.SYS..... : As others have pointed out before on the group, bright black, is lighter : over RGB and not black like it is on a tv. However, another thing I have on : my monitor is that yellow, is more like brown, although bright yellow is : yellow. This may be a CGA thing. IBM's CGA monitors display brown when you send them yellow, and the CM8833-II is likely to be copying this behaviour. -- --------------------------- ,@@.o ,@@. SPELL SUCCEEDS John Elliott | @@@@ @@@@ n \_O_ CHAOS in a sig... | '||` '||` Hr \I ` --------------------------- JL JL I\ /\\

Jools Smyth wrote: > fuzzix wrote: > >> Jools Smyth wrote: >>> However, another thing I have on my monitor is that yellow, is more >>> like brown, although bright yellow is yellow. >> Gee, must be a little like using a C64... ;) > > Not quite, as the sound is still crap! > > *hides* *shakes fist* Ooooooooh, I oughta... -- Duncan Snowden.

"Jools Smyth" <buzz@REMOVEMEexotica.org.uk> wrote in message news:4578af04$0$31236$da0feed9@news.zen.co.uk... > I just wired up my Spectrum 128k+ to a Philip CM8833-II monitor via RGB. > Anyway. Nice clear picture, even if the brown yellow is a little odd. If I > turn brightness up to full, it becomes almost yellow, but then everything > else is far too bright. Any ideas if it's possible to fix the brown ? You could use the little bit of "bright" circuitry in the diagram for the 128K SCART cable on this page: http://www.fruitcake.plus.com/Sinclair/Spectrum128/SCARTCable/Spectrum128SCARTCable.htm It should convert the RGB and Bright signals into analogue RGB, which you could then use in analogue mode on the CM8833-II. I haven't tried it myself... bye, James McKay.