SpritesMind.Net

Don't worry, it's done.

Thanks!

Years ago, when I made my emulator these things were taken into account in the very firsts steps, I'm surprised... The thing is that it completely depends on the way the original cartridge was designed and Mask ROMs(s) mapped, simulating mirroring might be accurate for some games but completely wron...

Chilly, I understand what you say, as the program does not access the mirrored memory, is not necessary to take this into account. BUT: Do you fully know the code? I know nothing. You can be 100% sure it's the same with mirrored memory than without it? In one hand we have a 100% sure that everything...

Chilly Willy, as long as I know mirroring in not a feature, is a side effect. in the case of writing 3MB into a 4MB EPROM you'll have $FF(if you don't program those bytes) in the last 1Mbyte, no mirroring goes on... 1 wasted Mbyte... Yes, what I will do is to double the last megabyte to simulate the...

Ok, thanks!

Just to clarify about mirror question:



This is the cheapest solution, so this must go.

Note: I don't care if there are 3 roms of 1Mb each or 1x2 + 1x1 Mb each, I only want to write 3Mb in a 4Mb EPROM.

Well, the Genesis should be able to handle a LOT more than this. You must be doing something pretty complicated to have issues with only 40 helicopters. Can you elaborate? I agree Geny can do more. Indeed I optimized a bit the code and now it is capable of doing that (using pointers instead "[]" wh...

1) How mirroring works on 3 Megabytes carts? The 4rt megabyte is a mirror of the 1st or is a mirror of the 3rd mega? I think it has to be the third... but I don't know for sure. 2) A 4-megabyte cartridge memory can save games (SRAM, flash or whatever)? How? I hope this time are more specific questio...

Thanks KanedaFr! It really sounds interesting. I don't think it's true that all games use precalculated paths. Some do, for sure, and some use a mixture. But generally a lot of games WILL do exactly what you're trying to do. Well, I don't test it in every game. Can you give an example of non-precalc...

Shiru, my intention is to work with C until realy asm is needed. I only want to know what a action game is capable with several (20-40) independent things moving with an IA, idealy a maximun cota. My intention was to not underrate it, but I think that MD can't perform a A* in this situation, and as ...

While I was trying things in my game I have found that if I use 40 like helicopter enemies that each own calculate his own path based on the location of the protagonist the scroll slows a bit. Well, it isn't optimized but, there is no colision detection yet, so I can get a map of the situation. So m...

¿ Is there a game that updates his VDP background graphics during scroll ? I'm searching a game that updates his VDP graphics memory (no plane or scroll memory) when it uses scrolling techniques. But: - Special cases, like Eggman in Sonic don't count, it should be on normal game, when scrolling. - S...

This is it. Thanks!

Ok, I got it. When you speak about DAC you include PCM sound in it. Z80 is more slow than it seems. All it sounds very hard.

¿Do you know if old comercial games uses PCM+FM to do sound effects+music?

I use VINT as a timer, and I decrement each channel's timer according to an overflow value made by adding the song's speed to a global timer. That works out well. The YM2612 also has two programmable timers that you can poll. That timers sounds interesting... As far you're going on Z80, i think you...

I wrote a mini dev kit which can help you to speed up yours dev and even if you don't use it directly you can at least use it as source of informations : Of course!, I'm using it to retrieve information in a fast way. Yeaahhh! reading C is faster thant natural languaje... :shock: But I'm using main...