And how did I come to this conclusion? Well simple. Search out a little game by Domark called Battle Frenzy/Bloodshot for the Sega Megadrive...a machine with no blitter and just powerful sprites/scrolling hardware via a 7.5mhz 68000 CPU with DMA channels just like an Amiga. Of course I presume it has no DSP in the cartridge because it is not one of the ultra rare DSP games for that system unlike the pathetic lump of shit by Nintendo which needed a DSP even for launch games like Pilot Wings :roflmao:
The major difference is the tile vs bitmap, so it wouldn't be easy to just port it.
The trick of having the bottom of the screen being a mirror image of the top would be easy with a copper list though.
Lack of sprites might be a problem for bullets, enemies, barrels & weapons. You may have to use dual play field for that or not use a copper list for the mirroring and just copy the data twice (either with the cpu or the blitter).
S.F: Bloodshot is one of the only 3d games for the Megadrive. How powerful was the Megadrive when it came to doing 3D games?J.B: Not at all. It is a bodge based on the character-based hardware. You had about enough characters to uniquely map about a third of the screen. The ‘polygons’ were inspired by the Wolfenstein 3D approach, they are all made from vertical strips. You might notice that the walls are effectively ‘reflected’ about the centre line using the character map. This is so only half of the walls actually needs to be drawn. I used a palette effect to disguise the reflection, and sprites for the ceiling light to further hide it. The rasterisation was done with about 750K of pre-generated code in order to reduce the cycle-time per pixel and to draw it all in time. It was quite an innovative effect in my opinion, and as you say it is fairly unique to have 3D on the Megadrive.
