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qsound: update command listing (nw)

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This commit is contained in:
Vas Crabb 2018-03-20 08:22:24 +11:00
parent efdbc81e06
commit 1de9b7f871
1 changed files with 18 additions and 9 deletions
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27
src/devices/sound/qsound.cpp
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@ -64,18 +64,27 @@
and external space from 0x8000 onwards. The additional ROM could
be anywhere in between.
Meanings for known command words (0x00 to 0x8f mostly understood):
Meanings for known command words:
(((ch - 1) << 3) & 0x78 sample bank
(ch << 3) | 0x01 current/starting sample offset
(ch << 3) | 0x02 rate (zero for key-off)
(ch << 3) | 0x01 channel sample offset within bank
(ch << 3) | 0x02 channel playback rate
(ch << 3) | 0x03 channel sample period counter
(ch << 3) | 0x04 loop offset (relative to end)
(ch << 3) | 0x05 end sample offset
(ch << 3) | 0x04 channel loop offset (relative to end)
(ch << 3) | 0x05 channel end sample offset
(ch << 3) | 0x06 channel volume
ch | 0x80 position on sound stage
The games don't seem to use (ch << 3) | 0x07 for anything. The
games use 0xba to 0xcb, but the purpose is not understood.
ch | 0x80 left/right position on sound stage
0x93 delayed reverb volume
ch + 0xba channel reverb contribution
0xd9 reverb delay (need to add 0x0554)
0xde left output filtered component delay
0xdf left output unfiltered component delay
0xe0 right output filtered component delay
0xe1 right output unfiltered component delay
0xe2 write non-zero to set delays
0xe4 left output filtered component volume
0xe5 left output unfiltered component volume
0xe6 right output filtered component volume
0xe7 right output unfiltered component volume
The weird way of setting the sample bank is due to the one-read
latency described above. Since the bank applies to the next read,