NEO-AES board

First (?) version of the AES board, made (and maybe assembled) by NEC. Uses the first generation chipset and exclusively works with 5V power supplies.

In late use of this board version, a video PLL and the NEO-POWER-0 power supply daughterboards were added on top.

Some consoles also have an added metal shield connected to ground.

=Board map=




 * 1A: Power supply barrel jack connector
 * 1C: Audio/video output DIN connector
 * 1F: Main clock circuit
 * 1I: 68k user RAM chips
 * 1J: System latch
 * 1KL: System ROM
 * 1OPQ: Analog sound circuit
 * 2EF: Video DAC
 * 2Q:
 * 3B: Video encoder and color burst oscillator
 * 3EF: Palette RAM latches
 * 3HIJK: 68k CPU
 * 3LMNO: soundchip
 * 4F~M: Cartridge slot
 * 4PQ: Palette RAM chips
 * 5CD:
 * 5FG: L0 ROM
 * 5IJK: Z80 CPU
 * 6M: Z80 RAM
 * 7B: Slow VRAM chips
 * 7C: Reset button
 * 7H:
 * 7K:
 * 8E: Fast VRAM chips
 * 8OPQR: Memory card slot
 * 9EF: Joypad input filters
 * 9HIJK: Analog sound circuit
 * 9LM: More joypad input filters
 * 10B: Power switch
 * 10F: P1 connector
 * 10H: Headphone 3.5mm stereo jack connector
 * 10J: Headphone volume slider
 * 10M: P2 connector