Sharp MZ-800 - Page 129

(ii) <duration>
<duration> specifies in units of 1/100 seconds the length of the tone generat-
ed by this statement. <duration> must be a numeric expression from 0 to 65535.
The SOUND = (<register>,<data>) statement is used to directly control
the sound generator (Programmable Sound Generator) LSI. The PSG can gener-
ate three tones and one noise. The PSG register table is shown below.
hiss ra Data
0 Tone 0 Frequency Integer from 1 to 2'° — 1
1 Tone 0 Volume Integer from 0 to 15 (see note)
2 Tone | Frequency Same as register 0
3 Tone 1 Volume Same as register 1
4 Tone 2 Frequency Same as register 0
5 Tone 2 Volume Same as register |
6 Noise Frequency Noise data
7 Noise Volume Same as register 1
The PSG can generate either synchronous or white noise. The type of noise
to be generated can be specified by sending 1-byte of data to PSG port $F2.
See Appendix B for control of PSG.
NOISE
Abbreviated Format
NO.
<melody>
Format NOISE <melody>[,<melody>]...
6-72
+ .
{ x <note name>[<duration>]
Explanation The NOISE statement generates white noise as specified by the <melody n>
parameters. The meanings of the <melody n> parameters are identical to those
of the MUSIC statement.
This statement can generate two parts of noises simultaneously. The parameters
specifying these two must be separated by a semicolon (;). Any two consecutive melo-
dies must be separated by a comma (,).
10 NOISE “C3D1"",""E3F1""
The above NOISE statement generates two parts of white noises simultaneously.