SpritesMind.Net

https://twitter.com/SEGA_Europe/status/ ... 0028642304

Looks like it will support custom ROMs.

neozeed wrote:

ehaliewicz wrote:Do you specifically need a C compiler or just runtime code generation of some sort?

I wanted a tiny and portable c compiler (linker and assembler ).

I may just give up, or start debugging.

Or write your own

alko wrote:

alko wrote:Shalom.

Please show me the complete source code of this effect (vertical scaling).

It is even possible to implement by means of SGDK?

What are you trying to do? Scaling sprites vertically?

Edit: nevermind, read the first page of the thread

Do you specifically need a C compiler or just runtime code generation of some sort?

cero wrote:OP: Port the cpu-heavy parts to your host machine and profile there, with the superior tools available.

You'll want to be careful with this idea. Modern CPUs are very different from something like the 68k, and what works well on one might not work well on another.

Manveru wrote:f the console sprites did not save 2 colors per byte, it will be a lot faster.

Agreed. I converted to bytes before rotating, which definitely incurs a large performance hit, but manipulating nibbles probably wouldn't have astounding performance either.

I don't know if this is what you are asking for, but you can try. I did and i have good results, but slow if you update it every frame: http://www.drdobbs.com/architecture-and-design/fast-bitmap-rotation-and-scaling/184416337 I've also used this technique. If I remember correctly, it would instantl...

You're right about bsr (a0), my mistake, however pc-relative addressing would have taken more text to explain, and I was going for a simple example of the principle of a jump table, not an optimized or practical real-world example, as already mentioned. Fourth. He actually branches to pointer data, ...

Ok, let me try to describe a bit better what's going on It will probably help if you have Easy68k and step through the code a line at a time. example_1: ;; load example value into d0, could be any number with any range of entries in the jump table ;; different size entries will necessitate different...

The reason your example is equivalent to a switch statement is because the code in the table uses JSR, so the routines will always return to the next entry in the table. A simple example of a jump table would be something like this. Sorry it's not a real world example, but the code works. ;; dispatc...

The example code you have would do this move.l d0, -(a2) // moves the 32-bit value in d0 to the address pointed to by a2, decrementing it by 4 before addressing move.l d2, (a4)+ // moves the 32-bit value in d2 to the address pointed to by a4, incrementing it by 4 after addressing the increment/decre...

This is because those drawText calls do not actually draw to the screen, but are essentially telling the VDP to draw those tiles later on, after the setPaletteColor changes have been made. There are two solutions, change the palette mid-frame (during horizontal interrupts), or use multiple palettes ...

90% performance improvement over the previous version?
That's seriously impressive.

Yes, the first color in the palette is transparent.

Here's a piece of code I saw the other day for computing signum of a 32-bit integer.