SpritesMind.Net

I believe that when you push too much datas to the VDP, it will lock the 68K on a BUS cycle then Z80 can't access the 68000 BUS anymore at the same time. You can avoid that by checking the VDP FIFO full/empty flag. It doesn't work on Gens (Fudged) but it does on real hardware, this permit to avoid s...

A sega genesis presentation on sega genesis for an university project... it's just awesome, well done guy ! My first YM2612 "emulator" was done in the same context :) Who said anything about universities ? I go to one after I finish 11th grade (happens after few days) and 12th grade. Remember - I'm...

Looks very nice so far ! Great work !

In PC lesson in school whole class had to make a presentation, teacher didn't say what I should use (all other used MS PowerPoint), but I wrote it in ASM for MD !!! Teacher liked it and I got 5 (it is A). Here is it : http://www.hot.ee/tmeeco/DWNLOADS/MPOINT.RAR It's all Estonian, but easily unders...

The goal is to have a 3D flat engine capable of making game like Starwing (SNES) with acceptable frame rate. I'm not sure that it is possible for SMD. To make Starfox-like game you need to render many polys per second - same or more than in Virtua Racing, it's about 5000-10000 for 15 fps (minimal a...

The TV displays 50 (PAL) or 60 (NTSC) half frames per second.
The console do that :
- send even lines (1st half frame)
- V Int
- send odd lines (2nd half frame)
- V Int
- ...

Anyway don't worry about the even and odd lines stuff, on a 320x240 resolution system, even and odd lines are the same

I'm very interested by all these 3D raycast game on genesis, they all have their own method to handle the thing =) I'm very interested in raycasting and other 'fake 3d' fast rendering techs too, not only for genesis, but for any small-powered systems. Even today these methods of rendering can be us...

A tile plan is by far more interesting than a simple scrolled image. A bitmap consum many memory, having a tilemap plan permit to define very large level with small data information :) You re-use the same tile many time :) Pitfall 32X did that for that reason. Well, RLE goal is the same. And if you...

It is not a simple grey pixel, the "odd" pixel is used to increase virtually the number of color, they assumed the game was played on a "bad TV" which mix adjacent pixel :) Sorry, I was wrong, it's indeed a pixel doubling. no problem, we can be easily fudged here on a "fast shot"... I'm very intere...

vertical scanline trick ? what are you speaking about ? maybe you mean the pixel doubling on X axis... I mean that they draw only 1 slice per 2 pixels of game window (not doubling, second slice is always gray). ZT also draws 1 slice per 2 pixels, not for speedup but for increase number of shades. U...

What about handling only 1 plan ? Genesis already offers 2 plans. You can use the 32X hardware to implement one enhanced plan :) It does sound good for me. Is 60 FPS possible with only one plan ? Yeah, for sure. But, as I've already stated : what's the point of it ? I mean, the real thing, drawing ...

One other technically impressive 3D game is Duke Nukem 3D : it looks really awful but the 3D rendering don't use the H-flip trick and the display window is large :) DN3D uses 'vertical scanlines' trick instead, so game window is not so big as it looks. vertical scanline trick ? what are you speakin...

What about handling only 1 plan ? Genesis already offers 2 plans. You can use the 32X hardware to implement one enhanced plan It does sound good for me. Is 60 FPS possible with only one plan ?

Yes, of course I saw it (I even write extracters for textures from TS, ZT, BS, DN3D). But TS has more impressive effects (like polygons between BG layers and very big animated objects like walking foots), than 3D-level. Although this level looks cool for first look, it's not so technically advanced...

The 3D level of Toy Story is the most impressive imo. I do want to examine that game :p The main trick is that they only render half of screen and use vertical flip for the other part, anyway, this is still quite impressive :) I slightly examined all raycasting games on SMD some time ago, and inter...