Alpha-68k

The Alpha-68k is a 16-bit arcade system board manufactured by Alpha Denshi, who later became ADK.

Technical Specifications

Main CPU: Motorola 68000 between @ 6 ~ 10 MHz, depending of each game.

Sound CPU: Zilog Z80 between @ 3,5 ~ 7,1 MHz, depending of each game.

Sound Chips:

• 3xYamaha YM2203 @ 2 MHz + DAC;
• Yamaha YM2203 @ 3 MHz + Yamaha YM2413 @ 3,5 MHz + DAC;
• Yamaha YM3812 @ 4 MHz

It is depending of each game.

Games Released

Release Date	Game Name	Developer	Publisher
1986-03	Super Stingray	Alpha Denshi	Alpha Denshi
1986-12 1987-05	Kyros / Kyros no Yakata (カイロスの館)¹	Alpha Denshi	Alpha Denshi World Games
1987-02	Mahjong Block Jongbou	SNK	SNK
1987-09 1987-10	Time Soldiers / Battle Field (バトルフィールチE²	Alpha Denshi	Romstar SNK
1988-01	Paddle Mania (パドルマニア)³	SNK	SNK
1988-09	Gold Medalist (ゴールドメダリスチE²	SNK	SNK
1988-09	Sky Soldiers (スカイソルジャー)²	SNK	SNK
1989-09	Gang Wars (ギャングウォーズ)²	Alpha Denshi	Alpha Denshi
1989-09	Super Champion Baseball	Alpha Denshi	SNK
1989-10	The Next Space	SNK	Pasadena SNK
1989-11	Sky Adventure	Alpha Denshi	Alpha Denshi SNK

Notes

• The numbers ¹, ² and ³ means what kind of combination sound chip is used;
• Mahjong Block Jongbou don't use any of the three combinations at the top of article, it have a AY-3-8910A as their sound chip.