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-rw-r--r--src/devices/sound/qsound.cpp3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/devices/sound/qsound.cpp b/src/devices/sound/qsound.cpp
index 04d7648223d..dd4960b1211 100644
--- a/src/devices/sound/qsound.cpp
+++ b/src/devices/sound/qsound.cpp
@@ -27,6 +27,9 @@
assumed that reading PIO with PSEL low when INT is asserted will
return the address and cause INT to be de-asserted, and reading PIO
with PSEL low when int is not asserted will return the data word.
+ The DSP program will only respond to one external interrupt per
+ sample interval (i.e. the maximum command rate is the same as the
+ sample rate).
The DSP program uses 2 kilowords of internal RAM and reads data from
external ROM while executing from internal ROM. As such, it