NEO-AES3-5 board

Fourth (?) version of the AES main board.

=Board map=

Original picture by BIG BEAR.




 * 1A: Power supply barrel jack connector
 * 1C: Audio/video output DIN connector
 * 1EF: Video encoder
 * 1M & 1P: Slow VRAM chips
 * 1N: Red power LED
 * 2ABC: Video DAC
 * 2F: Color burst oscillator
 * 2H:
 * 2JK: L0 ROM
 * 2MN: Fast VRAM chips
 * 3ABC: Palette RAM latches
 * 3PQ:
 * 4AB: Palette RAM chips
 * 4F~M: Cartridge slot
 * 4Q: System latch
 * 5J:
 * 5PQR: System ROM
 * 6ABC:
 * 6EFGH: 68k CPU
 * 6J: Piece of tape protecting the PCB from being scratched by the plastic case
 * 6LMN: Z80 CPU
 * 7B: Power "regulation" circuit (transistor and big resistor)
 * 7C: Reset button
 * 7D: First 68k user RAM chip
 * 7FGH: soundchip
 * 7L:
 * 7N: Z80 RAM
 * 7Q:
 * 8D: Second 68k 68k user RAM chip
 * 8LMN: Main clock and video PLL circuit
 * 8OPQR: Memory card slot
 * 9E: Joypad input filters
 * 9F:
 * 9HIJK: Analog sound circuit
 * 9M: More joypad input filters
 * 10B: Power switch
 * 10F: P1 connector
 * 10H: Headphone 3.5mm stereo jack connector
 * 10J: Headphone volume slider
 * 10M: P2 connector

=Differences with the NEO-AES3-3 board=

Todo: Change to "differences with NEO-AES3-4 board".


 * Red power LED added (invisible through case)
 * Layout and components changes in the analog video section.
 * Can work with 5V or 9V power supplies depending on board configuration (both were planned).
 * Different audio op-amps.