The Amiga CAN use RGBI. You'll gain clarity at the expense of all but 16
colors being unavailable. And of course, the monitor is responsible for
generating those colors, not the computer. You'll need to adapt the 1902
cable for the Amiga's 23D connector. The Amiga User's Guide will have the
proper pinout for the Amiga side, the 1902 is standard IBM and should be
included in the 1902 book. Any questions, let me know.