detailed schematics: http://www.ziegler.desaign.de/GBA/gba_base.pdf
I made this design of a GBA flash cart with just one 32/64/128/256MBit flash chip, 256KByte SRAM and backup battery. A layout is not available and I didn't have time to make one :-(.
You will need a ByteblasterMV from Altera for programming the EPLD. The source code of the EPLD is not public available, but the programming file ... :-)
Should be just an idea for your own cart design. You will need speed patches for slower Flash chips. Only 110ns chips are fast enough.
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