Konami GX400 is an arcade system board by Konami that made its debut in 1985. It is the Bubble System but with the bubble memory cartridges replaced with standard ROM chips.

Nemesis specifications

• Main CPU: Motorola 68000 @ 9.216 MHz
• Sound CPU: Zilog Z80
• Sound Chip: 2x AY-3-8910 PSG or YM2151, VLM5030 and K005289

List of Konami GX400 games

• Black Panther (1987)
• City Bomber (1987)
• Galactic Warriors (1985)
• Gradius (video game) (1985)
• Hyper Crash (1987)
• Konami GT (1985)
• Nyan Nyan Panic (1988)
• Salamander (1986)
• TwinBee (1985)