Eurhythm (NES Driver)

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Eurhythm
Released 1989-11-24
Programmers Kazune Hiiragi
Language 6502 Assembly

Eurhythm (NES Driver) is an unofficial name of the sound driver used by the sound team Eurhythm. The game Tetra Star credits Kazune Hiiragi for Music Program, verifying his programming of the driver. However, the name Kazune Hiiragi may be an alias.

Release History

The driver was only used in four Japanese Famicom games, and unfortunately did not see the light of day in American or European countries. The first game to use the driver was Cosmic Epsilon, and the last game was Famicom Igo Nyuumon. Only Cosmic Epsilon and Tetra Star contain credits and only Tetra Star credits the Eurhythm sound team. The other two games are not known to have credits, but a code comparison has been made to confirm all four games use the same sound engine.

Output

The driver outputs to the RP2A03, including the DPCM channel for drums.

Games

Released Title Sample
1989-11-24 Cosmic Epsilon (FC) (コズミック エプシロン)
1991-02-15 Famicom Shougi Ryuuousen (FC) (ファミコン将棋竜王戦)
1991-05-04 Tetra Star: The Fighter (FC) (テトラ・スター)
1991-11-29 Famicom Igo Nyuumon (FC) (ファミコン囲碁入門)

Technical

Frequency Registers

B-7 = 0E
A#7 = 0E
A-7 = 0F
G#7 = 10
G-7 = 11
F#7 = 12
F-7 = 13
E-7 = 15
D#7 = 16
D-7 = 17
C#7 = 19
C-7 = 1A
B-6 = 1C
A#6 = 1D
A-6 = 1F
G#6 = 21
G-6 = 23
F#6 = 25
F-6 = 27
E-6 = 2A
D#6 = 2C
D-6 = 2F
C#6 = 32
C-6 = 35
B-5 = 38
A#5 = 3B
A-5 = 3F
G#5 = 43
G-5 = 47
F#5 = 4B
F-5 = 4F
E-5 = 54
D#5 = 59
D-5 = 5F
C#5 = 64
C-5 = 6A
B-4 = 70
A#4 = 77
A-4 = 7E
G#4 = 86
G-4 = 8E
F#4 = 96
F-4 = 9F
E-4 = A9
D#4 = B3
D-4 = BE
C#4 = C9
C-4 = D5
B-3 = E1
A#3 = EF
A-3 = FD
G#3 = 10D
G-3 = 11C
F#3 = 12D
F-3 = 13F
E-3 = 152
D#3 = 167
D-3 = 17C
C#3 = 193
C-3 = 1AB
B-2 = 1C4
A#2 = 1DF
A-2 = 1FC
G#2 = 21A
G-2 = 23A
F#2 = 25C
F-2 = 280
E-2 = 2A6
D#2 = 2CF
D-2 = 2F9
C#2 = 327
C-2 = 357
B-1 = 389
A#1 = 3BF
A-1 = 3F8
G#1 = 435
G-1 = 475
F#1 = 4B9
F-1 = 501
E-1 = 54C
D#1 = 59F
D-1 = 5F3
C#1 = 64F
C-1 = 6AF

Links