SpritesMind.Net

Rule #1 in C when using struct : Never pass a struct to a function
Rule #2 in C when using struct : Never return a struct to from function

Yeah I need to redo a lot of pages. The reason I've setup a new wiki was that the old one was really spammed, too much work to clean it. And since no one ever really involved in the wiki I always tough that it was only used by me (and I still think that a bit :P) so I only started to create the page...

Some more from a different but also Sega chip: 4Y 04 76 C 4X 20 78 C Why do you write a list when the wiki have almost (all ?) the chip listed ? All 1200+ asics 22000+ proms? Oh I didn't know that you wanted to list ALL of them :) But feel free to add them into the wiki if you want. Just add a new ...

The program runs fine, but writing other thing than 'SEGA' into $A14000 doesn't lock the system when accessing the VDP after.

Why do you write a list when the wiki have almost (all ?) the chip listed ?

Ah yes true, it was out of my mind ...

Since so much of the VDP is set up with a 64K limit on VRAM addressing, would this only work in some clumsy way like selecting which one of two banks is being used for display purposes at any time? (sort of like the MSX2 VRAM expansion) Unused bit of table registers can be used for A16. Same for th...

Interesting.

Can you check if any of the undocumented pins are connected to something (http://wiki.megadrive.org/index.php?title=315-5313)? maybe one of them is used to switch between two 64Kb banks.

Thanks a lot

Hello,

Two questions,

1) Is the bit #0 at 0xA11100 is the same as the bit #8 (I know that is the case for the IO, not sure about the Z80 control port) ?
2) Is there a need to request the Z80 bus before accessing the joypad ?

I ask that cause that's what the MegaCD bios does.

Thanks.

Hello Delek,

I'm starting Neo-Geo development and I was wondering if adding the YM2610 was planned ?

Cheers

The pico is basically a megadrive without the z80,ym2612 and with a uPD7759 (adpcm chip). Notaz doc is pretty complete. I haven't run code on it for now but I have planned to do it since a long time. Best way to do a flashcard is to make an adapter for megadrive cart. I still have to dump the games ...

You'll probably find the answer in here : http://www.megadrive.org/~elbarto/md/Me ... -15398.asm
It isn't the last version of my disasm but it might helps you.

Amazing !!!

Maybe you can try to contact Aaron Giles, he knows a lot of stuff about LD.

I've updated mine with an address calculator.

There is also the VDP 315-5313A-01.