Akito Takeuchi (NES Driver)

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Akito Takeuchi
Released 1985-07-25
Programmers Akito Takeuchi, Naohisa Morota
Language 6502 Assembly
Formats Unknown

Akito Takeuchi is the unofficial name of the sound driver used in Sunsoft's NES games. The driver was originally created by Akito Takeuchi, then upgraded by Naohisa Morota to use DPCM samples and other effects.

Release History

The first game to use Akito's sound driver was Super Arabian, and the last game being Honoo no Doukyuuji: Dodge Danpei 2, both Japan-exclusive titles. However, the driver was used in many North American and European games such as Journey to Silius, Spy Hunter, Batman, and U-four-ia. Naohisa Morota's name started to appear when the driver started using drums on the square channel, and using the DPCM channel. Any games from that point that credited sound programming attributed it to him instead of Akito.

Inventor stole this sound driver and used in own NES games and some advanced hacks. This driver also used by Dragon Co. in one game, The Lion King V: Timon & Pumbaa.

Output

Akito's sound driver originally output to the RP2A03, using percussion on not just the noise channel, but also the square channel. In the later years, the sound driver was upgraded to use both an FM and slap bass on the DPCM channel (as well as drums for Batman), which is probably what the sound driver is best known for. In Sunsoft's Famicom Disk System games, the driver would also take advantage of the RP2C33 channel.

Games

Some of these games appear to have the same sound code as Sunsoft's driver, but were developed by different companies (mainly TOSE). These games will have a '?' in the Sample box until they can be verified.

Released Title Sample
1985-07-25 Super Arabian (FC) (スーパーアラビアン)
1985-10-04 Route-16 Turbo (FC) (ルート16ターボ)
1985-11-28 Ikki (FC) (いっき)  ?
1986-04-17 Atlantis no Nazo (FC) (アトランチスの謎)
1986-07-03 Kanshakudama Nage Kantarou no Toukaidou Gojuusan Tsugi Home (FC) (かんしゃく玉なげカン太郎の 東海道五十三次)  ?
1986-11-20 Dead Zone (FDS) (デッド ゾーン)
1986-12-12 Adian no Tsue (FDS) (アディアンの杖)
1986-12-18 Madoola no Tsubasa: The Wing of Madoola (FC) (マドゥーラの翼)
1987-02-06 Nazoler Land Soukangou (FDS) (ナゾラーランド 創刊号)
1987-03-03 Marchen Veil (FDS) (メルヘンヴェール)  ?
1987-03-27 Chitei Tairiku Orudoora (FDS) (地底大陸 オルドーラ)
1987-03-27 Super Boy Allan (FDS) (スーパーボーイ・アラン)
1987-06-12 Nazoler Land Dai 2 Gou (FDS) (ナゾラーランド第2号)
1987-07-20 Fantasy Zone (FC) (ファンタジーゾーン)
1987-08-11 Tenka no Goikenban: Mito Koumon (FC) (天下の御意見番 水戸黄門)  ?
1987-09-?? Spy Hunter (NES)
1987-12-04 Shanghai (FC) (上海)
1987-12-18 Nazoler Land Special: Quiz o Ikuse!! (FDS) (ナゾラーランドスペシャル!! クイズ王を探せ)
1988-01-23 Ripple Island (FC) (リップル アイランド)
1988-03-11 Nazoler Land Dai 3 Gou (FDS) (ナゾラーランド第3号)
1988-04-?? Freedom Force (NES)
1988-06-17 Blaster Master (NES)
1988-08-11 Mito Koumon II Sekai Manyuu Ki (FC) (水戸黄門Ⅱ 世界漫遊記)
1988-12-?? Platoon (NES)
1988-12-?? Xenophobe (NES)
1988-12-09 Nankin no Adventure (FDS) (南京のアドベンチャー)
1989-02-10 Sekiryuou (FC) (赤龍王)
1989-08-30 After Burner II (FC) (アフターバーナーⅡ)
1989-09-?? Fester's Quest (NES)
1989-12-22 Batman: The Video Game (NES) (バットマン)
1990-08-10 Journey to Silius (NES) (ラフ World)
1990-08-24 Shanghai II (FC) (上海Ⅱ)
1990-10-?? Gremlins II: The New Batch (NES) (グレムリン2 ―新種誕生―)
1990-10-26 Nantettatte! Baseball!! (FC) (なんてったって!!ベースボール)
1991-02-26 Nantettatte Baseball!!: OB All Star Hen (FC) (なんてったって!!ベースボール OBオールスター編)
1991-05-31 Nantettatte Baseball!! '91: Kaimaku Hen (FC) (なんてったって!!ベースボール’91 開幕編)
1991-09-20 U-four-ia: The Saga (NES) (へべれけ)
1991-12-20 Batman: Return of the Joker (NES) (ダイナマイトバットマン)
1991-03-31 Mr. Gimmick (NES) (ギミック!)
1992-03-28 Honoo no Doukyuuji: Dodge Danpei (FC) (炎 の 同球児 ドッジ弾平)
1993-03-26 Honoo no Doukyuuji: Dodge Danpei 2 (FC) (炎 の 同球児 ドッジ弾平2)
1997-06-?? F-22 (NES)
1997-06-?? Underground Mission (NES)
1997-06-?? Blood of Jurassic (NES)
1998-??-?? The Lion King V: Timon & Pumbaa (NES)
2000-??-?? Street Dance (NES)
2002-??-?? MusicBox (NES)
2002-??-?? 2002 World Cup P.K. (NES)
Unknown Monkey King (NES)
Unknown Alienis (NES)
Unknown Power Boat (NES)

Technical

Frequency Registers

B-8 = 01
A#8 = 02
A-8 = 03
G#8 = 04
G-8 = 05
F#8 = 06
F-8 = 07
E-8 = 08
D#8 = 09
D-8 = 0A
C#8 = 0B
C-8 = 0C
B-7 = 0D
A#7 = 0E
A-7 = 0F
G#7 = 10
G-7 = 11
F#7 = 12
F-7 = 14
E-7 = 15
D#7 = 16
D-7 = 17
C#7 = 19
C-7 = 1A
B-6 = 1C
A#6 = 1E
A-6 = 1F
G#6 = 21
G-6 = 23
F#6 = 25
F-6 = 28
E-6 = 2A
D#6 = 2C
D-6 = 2F
C#6 = 32
C-6 = 35
B-5 = 38
A#5 = 3C
A-5 = 3F
G#5 = 43
G-5 = 47
F#5 = 4B
F-5 = 50
E-5 = 54
D#5 = 59
D-5 = 5F
C#5 = 64
C-5 = 6A
B-4 = 71
A#4 = 78
A-4 = 7F
G#4 = 86
G-4 = 8E
F#4 = 97
F-4 = A0
E-4 = A9
D#4 = B3
D-4 = BE
C#4 = C9
C-4 = D5
B-3 = E2
A#3 = F0
A-3 = FE
G#3 = 10D
G-3 = 11D
F#3 = 12E
F-3 = 140
E-3 = 153
D#3 = 167
D-3 = 17D
C#3 = 193
C-3 = 1AB
B-2 = 1C5
A#2 = 1E0
A-2 = 1FC
G#2 = 21A
G-2 = 23A
F#2 = 25C
F-2 = 280
E-2 = 2A6
D#2 = 2CF
D-2 = 2FA
C#2 = 327
C-2 = 357
B-1 = 38A
A#1 = 3C0
A-1 = 3F9
G#1 = 435
G-1 = 475
F#1 = 4B9
F-1 = 501
E-1 = 54D
D#1 = 59E
D-1 = 5F4
C#1 = 64E
C-1 = 6AE

Addresses

Spy Hunter = $041C2-$04281

Links