Finally assembled and the pcb powers up. So iam posting a few more details photos.
The boards powers up and the FTDI can be accessed via usb. So tomorrow i gonna meet with max and we will port the old firmware from the mega16 to the mega644. Tomorrow we might have simple usb based uploader working.
Bottom view
Top view
MCU Atmega 644
Debug FDTI
8 x 512×8 SRAM
Logic gates 7400
MCU Software USB
Sregs and counters for the address bus
Bus drivers for the SNES address bus
