User`s guide

Similarly, to do a Reset (set all PSG regs to zero) ...
Reset 1016: A9 00 8D 00 C4 A9 04 8D 00 C4 60
To put the value $55 in PSG Register 02 (Channel B Freq. fine) ....
1080: A9 02 put Reg# in A (6502 accumulator register)
1082: 8D 01 C4 store A at the Data address ORA1
1085: 20 00 10 JSR to Set Reg# (sets "current register" to Reg 2)
1088: A9 55 put the value $55 in A
108A: 8D 01 C4 store A at the Data address ORA1
108D: 20 0B 10 JSR to Write Data ($55 goes into PSG Register 2)
1090: 60 Exit from subroutine
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010- How do I get my MockingBoard to work on my GS?
You need to go to the GS Control Panel and change the Slots setting for the
Slot your MB card is in to "Your Card".
The 'standard' place for a MockingBoard is Slot 4. A few early programs
require that the board be there in order to work; but, most programs which use
MB will let you specify the Slot. A few games and other wares require
modifications or interface software to work with MB on a GS.
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011- I have a Mockingboard Sound II board installed in my
GS but cannot get it to work with Ultima IV and Ultima V.
How can I play these games with MockingBoard music and
sound effects?
There are a couple of software packages which will let you play Ultima IV
and Ultima V with MockingBoard sound on a Mockingboard-equipped IIgs. Both of
these wares take care of activating the MockingBoard Slot without changing
Control Panel settings. You can find the software on ...
Ground in the AOL area (U4MOCKV2.SHK and U5MBONGS.SHK):
http://www.apple2.org.za/mirrors/ground.icaen.uiowa.edu/Collections/AOL/
in the Games/Adv./Roleplay/ folder.
GS WorldView's archive (U4MBonGSv22.zip and U5MBonGSv11.zip):
http://apple2.org.za/gswv/a2zine/Games/ .