MACHINE REFERENCE

Neo Geo AES

The Neo Geo AES was SNK’s home version of its MVS arcade board, released in Japan on 26 April 1990, and it ran arcade games on a console at an arcade price.

Why it matters

The AES used a 12 MHz Motorola 68000 and a Z80 sound processor with sprite hardware that could put 380 sprites on screen, the same as the arcade cabinet. It was expensive, with the Gold System at $649.99 and games around $200, so only 410,000 consoles were sold, but SNK kept releasing games on it until 2004.

What to check before you buy

  • Check the board revision; some give weak RGB or checkerboard video that needs a mod.
  • Test the video and sound for capacitor faults.
  • Look for fake or bootleg cartridges; prices are high and copies exist.
  • Check both controller ports and the memory card slot.
  • Confirm the region, since Japanese and US consoles are not interchangeable with every cartridge.
Neo Geo AES console with controller

Photo: Evan-Amos, Wikimedia Commons (CC BY-SA 3.0)

Released

1990

RAM

64 KB main RAM, 84 KB video RAM, 2 KB sound RAM

CPU

Motorola 68000, 12 MHz, with a Zilog Z80 at 4 MHz as sound coprocessor

Launch price

$649.99 for the Gold System (US); games about $200 and up

Manufacturer

SNK

Form factor

Home console, cartridge-based, using the same hardware as the MVS arcade board

CPU

Motorola 68000, 12 MHz, with a Zilog Z80 at 4 MHz as sound coprocessor

Chipset

SNK custom video chips

RAM

64 KB main RAM, 84 KB video RAM, 2 KB sound RAM

ROM

Unknown

Graphics

320 x 224; 65,536 colour palette with 3,840 on screen; up to 380 sprites on screen

Audio

Yamaha YM2610, 14 channels (4 FM, 3 SSG and 7 PCM)

Storage

ROM cartridges up to 716 megabits with bank switching; memory card

Ports

Two controller ports, memory card slot, RGB and composite video output

OS

None; games boot from the cartridge

PSU

External power adapter

Units sold

410,000 AES consoles (MVS arcade boards sold about 1 million)

Successors

Neo Geo CD (1994); Hyper Neo Geo 64 (arcade). A planned Neo Star console was cancelled

  • Weak RGB video on some board revisions
    Early AES revisions (3-1 and 3-3) have low RGB output that is fixed by swapping 100 uF capacitors for larger ones. Board 3-6 shows vertical lines and 3-5 can show a checkerboard pattern, both cured by RGB mods.
  • Audio problems on some revisions
    Revisions 3-3 and 3-4 can have audio problems from missing bypass capacitors in the audio section.
  • Ageing electrolytic capacitors
    The electrolytic capacitors are now past their expected life and failing ones cause power, video and audio faults. Recapping is a common first repair.
  • 1990 The MVS arcade system appears on 16 April and the AES home console on 26 April in Japan
  • 1991 The AES launches in North America on 1 July
  • 1997 AES manufacturing ends
  • 2004 The last official Neo Geo game is released