Author: Johan Klockars (ctfs.celsiustech.se)
Date: 01-21-2002 17:44
> As i state in that, in the CT60 game i'm
> writing my intention is to draw my screens
> in CT60 TTRAM and then copy it down into
> the STRam.
A very good idea.
> to a crawl, since the case is probably
> analogous to an AB40?
It would indeed be.
> Basically i'm only intending to send the
> bits of the screen that have changed to
> reduce the load. but i was just wondering
That might work if your screen does not change too much. You might want to consider using 8 bit mode too, to halve the bandwidth needed. It might actually be possible to do both dithering and chunky to planar conversion while copying without slowdown on an '060.
> how best to send the data whilst still
> keeping the 68060 doing the hard stuff
> while the busses are waiting?
Somehow you need to have something to do inbetween the writes. In general, I think that will be difficult, but things like chunky to planar, dithering, 32->16 bit TC conversion and such is definitely possible.
That is, try to leave as much of the display work as possible to the copy phase. Doing anything unrelated while copying will be very hard at best, I think.
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