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: NEO-G0
• 2JK: L0 ROM
• 2MN: Fast VRAM chips
• 3ABC: Palette RAM latches
• 3PQ: LSPC2-A2
• 4AB: Palette RAM chips
• 4F~M: Cartridge slot
• 4Q: System latch
• 5J: NEO-C1
• 5PQR: System ROM
• 6ABC: NEO-B1
• 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: YM2610 soundchip
• 7L: NEO-D0
• 7N: Z80 RAM
• 7Q: NEO-E0
• 8D: Second 68k 68k user RAM chip
• 8LMN: Main clock and video PLL circuit
• 8OPQR: Memory card slot
• 9E: Joypad input filters
• 9F: YM3016
• 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.