Programming - the procedure indicator volume of music.
(C) DR.CRASH / THH
INDICATORS
Recently divorced huge
number intruh with every
distortions of the volume indicator
Mouzon. Such intro looks very
cool, if you have properly connected
Music coprocessor. But if he
connected properly ... then begin
all kinds of breakup (at least you do not
see any SPECTRUM ANALYSER'ov).
To avoid this, many cunning
person (including us) read
the channels volume directly from
The Player Mouzon. By the way this step is very
even a good one. For clarity, give
Example: Reading from the port indicators:
LD BC, # BFFD
LD A, # 08 (Channel A)
OUT (C), A
LD B, # FF
IN A, (C)
Total received 11 bytes, 58 cycles. A
reading of the Player Mouzon reduced only to
commands such as LD A, (MUS + NNNN), where NNNN -
displacement of the load addresses of Mouzon.
This shift is easy to find -
or dig into PLAYER'e or after
Call for playing throw the whole MUZIK
LDIR'om in the display area, and then
Pick up address. Needless to all this
it will inhibit robust design, but
will be less obscene cries when any living creature with dull
connected AY sees your intro or demo.
Finally, I will tell you about one
the invention of 'folk art'
called 'KEMPSTON ... BEETLE '(by analogy with
Kempston Mouse).
So begin:
We sat down once with Demn'om, hang out with
my home. Suddenly runs Virus with another paranoid idea. You
see, if he found such a joke: if on a computer with the left
AY connection while reading the indicators from the port a
little over poizvraschatsya KEMPSTON JOYSTICK'om, then the port
# FFFD begins to read the nonsense. Try - really well. The same
evening we knocked up this creation of such a scheme:
took the connector from KEMPSTON'a, have closed all
conclusions (LEFT + RIGHT + UP + DOWN + FIRE + common) and
connected to the PC .... Oddly enough
indicators have earned! So you can
try it on his wheelbarrow, which can
and obtain (we tested on DelteS-02, extended to 128k and left
Connected YAMAH'oy).
And in order that you do not mudilis vain and do not
picked displacement from the start I'll Mouzon
bring a small table:
Music Editor channel offset
Pro Tracker 2.1 and 2.03 + A 595
B 596
C 597
Pro Tracker 2.4 (PHF) A 2577
B 2578
C 2579
Sound Tracker Pro 2.0 A 250
B 251
C 252
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Programming - the procedure indicator volume of music.
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