I'm not sure if what I'm trying to achieve is possible and my search-fu isn't optimal today. So...
Olivetti M240 monitor with OGC / CGA card, composite output connected to Olivetti amber monochrome CGA monitor. Works fine for 40- or 80-column text and CGA graphics.
Olivetti Prodest MM 1200 green composite monitor with RCA input. When connected to the above system it shows a distorted image broken up across the screen so it's effectively showing four narrow columns of the source image, but badly broken. This is true regardless of screen mode.
I'm guessing the Prodest monitor will work with old console-type computers such as BBC Micro (it came with a clone of the Master, I think), but not with a CGA composite source. Is there anything I can do to change that?
Alternatively, the Prodest monitor could be broken. Since I have nothing else to test it with at the moment, I can't be sure. Or the RCA cable I'm using might be of a poor quality. I've ordered a coax one but I don't think that'll make a difference.
Any ideas?
Olivetti M240 monitor with OGC / CGA card, composite output connected to Olivetti amber monochrome CGA monitor. Works fine for 40- or 80-column text and CGA graphics.
Olivetti Prodest MM 1200 green composite monitor with RCA input. When connected to the above system it shows a distorted image broken up across the screen so it's effectively showing four narrow columns of the source image, but badly broken. This is true regardless of screen mode.
I'm guessing the Prodest monitor will work with old console-type computers such as BBC Micro (it came with a clone of the Master, I think), but not with a CGA composite source. Is there anything I can do to change that?
Alternatively, the Prodest monitor could be broken. Since I have nothing else to test it with at the moment, I can't be sure. Or the RCA cable I'm using might be of a poor quality. I've ordered a coax one but I don't think that'll make a difference.
Any ideas?