forum.defence-force.org

How interesting... Just one thing. Am I wrong, or it is not possible to scroll using dynamic redefinition? I mean, the masked sprites on top would show glitches in the background parts which are visible. That is why I told about alternating std and alt charsets at each frame, to keep everything draw...

Let me write down all this and see if I am mistaken somewhere... Using pre-shifted tiles It is possible if the number of different tiles is low. Cobra, for example, does not have many different tiles at the same time in the screen. You need to be creative when creating the maps, so they don't look t...

This is getting interesting... :) I took a look at Cobra, which I enjoyed a lot in the past btw, and you both are right. It does not have many different tiles and and are very intelligently used, so the result is quite varied, fast and smooth. It changes the set of tiles from screen to screen to inc...

I have been reviewing the forum you suggested and took a look at the sources. Well, they are evil :twisted: and very very fast. I can't wait to see OType finshed... Indeed vertical scroll is easier. Horizontal scrolling would mean either 6pixel scrolls or slowly rotating bytes. And, well, yes. I wan...

Thanks to everybody for your comments. I really think that this kind of technique has quite a big potential, but I am still worried about the points I made in my first post. I imagine that with some intelligent designs (minimizing the usage of tiles in the background) and a good game design somethin...

Hi all. Now that Twi is about to release a fantastic tool for designing tile-based games, I remembered I had something in my hard disk for months now. It is a quite disappointing test trying to find out a possible technique for fast scrolling games in the Oric. I managed to produce masked sprites ov...

Oh god! I completely forgot to announce it! Thanks to the incredible work of Fabrice Frances in producing the ultra-fast tape for SkoolDaze, here comes a brand new version of tap2cd which seems to correct the errors of the previous version. Sources here , including the readme file with instructions....

WOW it looks fantastic!

That seems very promising indeed!

However, I cannot see any of the pics you posted. Maybe a broken link?

Hi again. Okay. It, of course can be polled. The first version of the code works as I told you, but after a lot of work, Fabrice rewrote everything for 1337 so it is done now through polling and also it avoids the Telestrat bug (which he wrote about in CEO-mag, IIRC). You can find the code here http...

Hi Dbug. I Have a similar code in my games, which was based on Fabrice's. I can't have a look at it right now, so I might be wrong, but I think the main code calls a routine which waits in an infinite loop for the irq to occur. Thus the ISR you have there. It gets rid of the context and returns to t...

Dbug wrote:The fastest code is the one you don't run

Yeah, that I learned from you, Dbug. I remember how I was trying to make a fast compact pixel_address and line routines and how you demonstrated me that it was way better to use tables and avoid running code.

You enlightened me indeed!

Hi! You're using the shift & add method for 8 bit, aren't you? That is quite fast and compact. If you ever need a really fast method you can check my post here . I really needed that speed in 1337, due all the matrix operations that were needed. Check www.6502.org for more interesting sources fo...

I think I read somewhere that USB drives cannot be accessed at low level, so I guess that writedsk won't work.

I will try to find out where I read that, to make sure.

CEO-mag used to publish some articles in english. I think it still does.

Appart from that, I doubt you'll find anything but occasional articles on retro magazines.