I have bought a 2nd hand IIsi with 5MB RAM and the AppleColor 14" display. It runs system 7 and it looks OK for 16 colors. When I switch to 256 colors, all the colors change (it definitely doesn't look right). The memory allowance for the screen is for 256 colors. I don't think there is a memory problem. Am I lacking an extension for the monitor? Any suggestions would be valuable.