Re: [cc65] 3dmaze portability

Hi Karri,

> The Lynx has a much larger drawing area and only a small viewport. Usually
> the scene is drawn at 512 by 512 pixels and the viewport (160 by 102 pixels)
> is following the game character and scrolled around the game area. All
> "clipping" is done in hardware. There is no need for any kind of software
> clipping.
>
> I have not checked the tgi driver for this yet. But it should be possible to
> draw on any screen coordinates. Also outside the visible screen area. If the
> tgi driver limits this then I probably need to create another driver for 512
> by 512 pixel screens that could be used for platformers. (And also a new
> tgi_setviewport call for moving the visible screen around the playfield.)

I certainly don't have enought background info but nevertheless my two cents:

Having two tgi drivers seems absolutely reasonable to me. One with
160x102 for "naive" tgi apps - being the default driver. And one with
512x512 for advanced Lynx apps with a tgi_ioctl for scrolling.

Best, Oliver
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