OK here is my BASIC listing, taken from the same document Akira^8gb used. It makes a noise and that's it!
But just in case its useful to someone:
10 POKE 57152,32
20 POKE 57168,1
30 POKE 57152,64
40 POKE 57168,16
50 POKE 57152,96
60 POKE 57168,240
70 POKE 57152,128
80 POKE 57168,119
90 POKE 57152,160
100 POKE 57168,152
110 POKE 57152,35
120 POKE 57168,1
130 POKE 57152,67
140 POKE 57168,0
150 POKE 57152,99
160 POKE 57168,240
170 POKE 57152,131
180 POKE 57168,119
190 POKE 57152,176
200 POKE 57168,49
I've just looked at the datasheets for both chips (YM3812 and YM3526),
3526 says: "The mode selector enables switching between the sounding of all nine tones at one time, and of six melodies and five rhythms. In either case, the tones can (be) varied."
3812 says: "Mode selection of simultaneous voicing of 9 sounds or 6 melody sounds and 5 rhythm sounds is possible. Both modes can produce various sounds."
How did you get to the conclusion that there is no percussion mode? (I don't know, hence why I am asking!)
What the 3526 lacks is waveforms.
Regards
Spikes