Originally Posted by lukassid
Yes but you need better chip in Indy, this was just experiment. Great coding skills but too slow and unstable to use.
Indivision ECS is a flickerfixer, not a graphics card. It is in the wrong place (on the wrong bus) for a faster framebuffer mode; this chip is great already: With the hardware we have on the unit, we can move more than 160MBytes per second, which is plenty for a 12-bit framebuffer. It's just that the ECS chip bus with it's low bandwidth of 3,5MBytes/s isn't good enough for a gfx card.
In other words: It is technically impossible to add a gfx card on the Denise socket. You need a bus that has a much higher performance, and that's not available in the A500 at all. You therefore need to design an accelerator with a fast local bus, which brings us back to the topic of the last few pages: ACA500.
The local expansion port of the ACA500 is still not fast enough for a gfx card (in theory it gets 7MB/second). It'll be barely enough for USB and/or networking.