Third-party firmware PoC...

[Claudio L.]

(07-07-2014 06:21 PM)debrouxl Wrote:  critor and I are fully aware of who Cyrille and Tim Wessman are
Maybe I've discussed with them through other means of communication.

Low-level Prime development started at Omnimaga indeed... It could still be there, but discouraging several high-profile members from participating to Omnimaga was not a good thing to do for them.

Yesterday, I spent a bit of time porting a starfield effect demo to the Prime, but the results are surprising, and probably not unrelated to the fact that the three colored areas are slightly shorter than they should be.

The S3C2416 is very similar to the S3C2410 used in the 50g, but the LCD controller with 2D accelerator is new, so I'm not sure I can help you there, but I'll try to give you some hints.
Your first step should be to write a firmware that reads and interpret the contents of VIDCON0, VIDCON1, etc. (I'm assuming you already have the S3C2416 reference manual, if not that's your first thing to do).
From there you can get the virtual screen size, base address, etc, more important PAGEWIDTH and OFFSIZE for your window. Since your bands are shorter than you expect my first guess is that it's because the scan length (PAGEWIDTH+OFFSIZE) is larger than the width of the screen. You can get the information from those registers, and adjust your code according to the LCD controller settings (of course, you could also try to program the LCD controller to whatever you want).

I think it's great that other communities, be it TI Planet, Omnimaga or others, are taking interest in HP calculators. Those communities have a lot of much needed young talent with a lot of time to spare.

Keep hacking and sharing, and we'll keep an eye on your progress.
Claudio