--- In gbadev@yahoogroups.com, "Janwillem Naesens" <sisghidir@h...>
wrote:
> Now maybe someone over here, having ever made a flash cart
> of his own, has know similar problems? Or maybe anyone could
> pass me a detailed timing report on the protocols?

You mean beyond what's here?
http://www.ziegler.desaign.de/GBA/gba.htm

> Or if anyone has been able to decode the logo sequence, or
> maybe just the order in which the gba reads it...

The 156-byte "Magic Cookie Data" from 0x08000004 to 0x0800009f
is a Huffman-compressed representation of the Nintendo logo.
You can create a proper header, including the MCD, by using
any of the header tools available at gbadev.org. If you
already have a proper header, then you have protocol problems.

> PS: monday we're going to try connect using the link port and a
parallel cable to the PC. But I don't actually know if it is possible
to read from the cartridge through that port.

It is possible. The MBV2 cable can dump carts:

mb -1 rom.gba -w 300

(that's a dash one not a dash L)

--
Damian