composite + RGBI to Philips 8833 II

[smf]

It seems annoying you have to switch the composite/rgb switch and the ttl/analogue switch to go between 40 and 80 columns. If I leave the ttl/analogue switch then I get the 80 column screen overlayed on the 40 column screen but the sync is all wrong. Anyone else ever seen that? Or is it something I've done.

I thought it might have been because I connected all 9 wires in the cable I made, but I disconnected pin 7 in case that was interfering but it made no difference.

I have to say though that the 40 column output from my 128D is appalling, the vertical colour banding I got on my tv has gone into a whole new dimension.

edit: rather than using a commodore branded 40 column cable I dug out my old cable I used on my 64 & it looks perfect. I can only guess that somehow the commodore cable is for svideo and not composite. Even though my monitor has a marking for the chroma and luma inputs, the luma doesn't exist. So I don't know how it differs from my old working cable. I'm not even sure it's supposed to even be used on the 64/128.

also I think I was confused about the ttl/analogue switch and I think I had it the wrong way round... so technically I don't have to flick it each time. The picture is much brighter in analogue though, which is why I thought it was the correct setting.

anyway, at least I'm back to having a commodore permanently setup now. time to rip the 128d apart and modify it ( I'm real tempted to take out that damn fan ).

[wte]

I didn't entirely understand your post

• Overlay of screens is not normal! Never!
• TTL is the correct position for the RGB switch. Brightness is controlled by an adjusting knob. You loose the half of your colours (8 of 16) using "RGB analogue" and may be damage some electronic components.

WTE

[smf]

I didn't entirely understand your post

• Overlay of screens is not normal! Never!
• TTL is the correct position for the RGB switch. Brightness is controlled by an adjusting knob. You loose the half of your colours (8 of 16) using "RGB analogue" and may be damage some electronic components.

WTE

Yeah I know it's not normal, I just couldn't understand why you could even get it in that state by having the buttons set wrong.

I know TTL is the correct position, but it's a push button and I thought the positions were the other way round. I know how to adjust the brightness, but even at the brightest it doesn't really have a white white. I was trying to figure out whether any colours were different when set to analogue & it didn't seem there were any missing.

I just think my monitor is a bit weird :-)

There is no way you can damage the monitor by setting the TTL/Analogue switch the wrong way Analogue is 0v-5v.
TTL is 0v-0.8v = off & 2v-5v = on.