> So I'm looking into a fairly complicated CRTC chip (The Signetics SCN2674), and it > looks like it can configure the sizes of the offscreen areas and visible areas pretty > much at will - with at least one game exploiting that for raster timing. > > I know it's the case that there's a call that lets visible area be changed within the > driver, because PSX.c uses it, but what about the raw parameters - all I see in > screen.c is the static versions for init time?
You can definitely change the screen parameters dynamically; look at the CRTC6845 emulation, for instance.
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