dbCards will allow developers to make physical releases of homebrew TurboGrafx-16 and PC-Engine software. The current board design allows for 1Mbit, 2Mbit, 4Mbit and 8Mbit ROMs to be burned onto the dbCard. So far I've successfully tested everything but the 8Mbit version - I'm getting weird graphics corrupt on 8Mbit. It could have to do with the fact that I'm using 4Mbit chips and the 8Mbit version splits the ROM into two chips.
How It Works
The dbCard uses SST39SF0x0 flash ICs in a TSOP-32 package in order to fit nicely in the TurboGrafx-16 console. But to make burning the dbCard's easier, the TSOP-32 footprint is expanded to the SST39SF0x0's DIP-32 footprint which is fully compatible with many existing EEPROM burners (I use a TL866CS, pictured to the right). The DIP-32 footprint is staggered which means you can press-fit row-headers in there in order to interface to the EEPROM burner and then remove the row-headers when done.
More to come as I figure out what is wrong with 8Mbit flashing!
dbCard in EEPROM Burner
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Cratermaze
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Neutopia
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