Notes supported by the BIOS sound functions
G2 EQU $00 G = 1.5 8ves below middle C
GS2 EQU $01 G sharp (second 8ve) , etc.
A2 EQU $02
AS2 EQU $03
B2 EQU $04
C3 EQU $05
CS3 EQU $06
D3 EQU $07
DS3 EQU $08
E3 EQU $09
F3 EQU $0A
FS3 EQU $0B
G3 EQU $0C
GS3 EQU $0D
A3 EQU $0E
AS3 EQU $0F
B3 EQU $10
C4 EQU $11
CS4 EQU $12
D4 EQU $13
DS4 EQU $14
E4 EQU $15
F4 EQU $16
FS4 EQU $17
G4 EQU $18
GS4 EQU $19
A4 EQU $1A
AS4 EQU $1B
B4 EQU $1C
C5 EQU $1D
CS5 EQU $1E
D5 EQU $1F
DS5 EQU $20
E5 EQU $21
F5 EQU $22
FS5 EQU $23
G5 EQU $24
GS5 EQU $25
A5 EQU $26
AS5 EQU $27
B5 EQU $28
C6 EQU $29
CS6 EQU $2A
D6 EQU $2B
DS6 EQU $2C
E6 EQU $2D
F6 EQU $2E
FS6 EQU $2F
G6 EQU $30
GS6 EQU $31
A6 EQU $32
AS6 EQU $33
B6 EQU $34
C7 EQU $35
CS7 EQU $36
D7 EQU $37
DS7 EQU $38
E7 EQU $39
F7 EQU $3A
FS7 EQU $3B
G7 EQU $3C
GS7 EQU $3D
A7 EQU $3E
AS7 EQU $3F