Commodore 1901 monitor for IIgs?

["ralmin" <xbiber@bigpond.net.au>]

This is a dual-input monitor, with Composite / Chroma input (2 RCA jacks)
and RGBI (9 pin D-shell).

I don't know how I would separate the PAL encoded composite video output
from the IIgs to a separate Chroma signal, would that be possible?

Alternately, could you design a cable to connect the RGB connectors?

The pin-out for this 9-pin connector is according to my Commodore 128's
manual:

Pin    Signal
1    Ground
2    Ground
3    Red
4    Green
5    Blue
6    Intensity
7    Monochrome
8    Horizontal Sync
9    Vertical Sync

thanks,
Ralmin.