SpritesMind.Net

Wow, just looking at the two demo screenshots is impressive. すごい！

Another thing to be careful about when doing a memory test is to not go outside the areas that get DTACK on a standard MD. Because there is no bus error circuitry, the system will lock up in those areas. Even if your memory modification has DTACK, an unmodified MD will not have the DTACK and will st...

My method detects 65536B in the emus, instead of 2MB so I assume it's the way to go :D ... but I can't test on my MD because my RAMcart isn't ready... That's because memory mirroring is a hardware effect that doesn't need to be emulated to make games work properly, and therefore is usually not emul...

No it's just to detect any extra RAM that anyone might add to the console... I might make use of it for some more complicated features :lol: Then you better check for mirroring. If someone adds a 256K byte RAM, but decodes it into an entire 2 megabyte space, your method will see 2 megabytes. If you...

I can't believe that guy charges for his emulator, and they aren't even good. Pitty to anyone who actually buys the full version. (It's YM2612 emulation is horrible) The best part is when an emulator of his has had bugs for years, and he still expects you to upgrade to the paid version. (which just...

Looks like a byte swap was missed... but good friggin' lord! I'm not use byte swapping. This is long word reading by byte. EDIT: Hmm... thinking about it a moment, if the above address isn't aligned and you're simulating the alignment error of the 68000, my code above will cause a fault on odd alig...

What's the danger of forcing the DTACK signal low (active) when the megadrive drives it high? A big counter is the best solution for Eke's request... As far as I know, DTACK should be connected from open-collector outputs and should never be "driven" high. Basically, what is needed is a bus-error c...

Hello all, Yesterday I was lazy to switch computer to do a little bit of dev on Mega Drive so I start to setup a dev environment on my FreeBSD desktop. I've compiled the FreeBSD port m68k-rtems-gcc and it works fine to produce code for the megadrive (using Stef .ld file from his dev kit), I found a...

As long as we're all showing off our linker scripts, here's the one I ended up with after getting someone's OS X-based GCC 3.4.4 working. It was a total pain to get initialized global data working. It's not great, but it may have something in it that someone will find useful: SECTIONS { .text 0x0000...

What source can be used as initial state for pseudo-random generator on SMD (to make generator produce different sequences at each power-up)? Other than not re-initializing the seed after reset, there really isn't any way. The circuitry is the same every time, with esentially no non-determinstic pa...

I've researched on PAL-M to NTSC converters and those have prices around $300. Considering that Ebay has offers of Genesis at $10 (buy-it-now) it might be a better option to buy a genesis and switch the circuit board (of course I don't want that giant Genesis logo). Don't try to fight it, just get ...

It is my understanding that you can't use MD video mode (Mode 5) from the Z80 because it needs 16-bit writes.

As for writing Z80 games booted from the 68000, I think there is some hardware (like the joypads) that you can't access, even through the 32K window.

It takes much less skill to hack new graphics onto an old game than to write a new one. Such lesser skill is easier to find, meaning they won't likely have to go far to find someone to do it, and will probably form around someone with such skills, rather than having to go looking.

1) If they were a pirate company, why would they need someone to write new games? There are plenty out there that they can just copy.

2) There isn't any money in writing new games for old console systems. You can't do it for the money, only for the love and fun of it.

There is a Phantasy Star I cart that works on Megadrive, and it does exactly that. But it still has an SMS bankswitching chip inside. It isn't a generic MD flash cart with an SMS game on it. Also, the Megadrive doesn't have the TMS-9918A video modes of the SMS, so there are a few SMS games that you ...