Lucas wrote:
If you have a Video Overlay Card, it can be coaxed into an interlaced Super Hi-Res mode of 320x400 or 640x400 using Banks E0 and E1. This only works because the VOC has its own copy of memory for all the IIgs graphics modes. There was a demo for this I downloaded several years back which showeda monochrome Mac OS screenshot @ 640x400 displayed on the IIgs. Technically impressive, but not practical as the interlaced video modecaused a *lot* of flicker. -Lucas
I also saw a demo on a IIe using a Video Overlay card to show some pics in IIgs formats on a IIgs RGB monitor. Wayne