Hi there,

Here at the univ we're having a little project on the gba: we're trying to
connect one to an FPGA. To use the FPGA as a 'living cartridge'. (kinda like the
Xport at www.charmedlabs.com). Now to start, we just use the FPGA to do a little
interface and we use genuine gba ROM's that we upload in a RAM-chip. Problem is
that all we get out of the gba is a scrambled nintendo logo. We put analysers on
all signals, logged the incoming adresses and outgoing data, tried 100,000
different ROM's, but nothing helps.
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? Or if anyone has been able to decode the logo sequence, or maybe just
the order in which the gba reads it...

unbelievebly gratefull,

Sis

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. Maybe anyone has info on that?