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-rw-r--r--qemu-doc.texi14
1 files changed, 14 insertions, 0 deletions
diff --git a/qemu-doc.texi b/qemu-doc.texi
index 2f566b6ce..99d7f0db5 100644
--- a/qemu-doc.texi
+++ b/qemu-doc.texi
@@ -199,6 +199,20 @@ QEMU uses YM3812 emulation by Tatsuyuki Satoh.
QEMU uses GUS emulation(GUSEMU32 @url{http://www.deinmeister.de/gusemu/})
by Tibor "TS" Sch├╝tz.
+Not that, by default, GUS shares IRQ(7) with parallel ports and so
+qemu must be told to not have parallel ports to have working GUS
+
+@example
+qemu dos.img -soundhw gus -parallel none
+@end example
+
+Alternatively:
+@example
+qemu dos.img -device gus,irq=5
+@end example
+
+Or some other unclaimed IRQ.
+
CS4231A is the chip used in Windows Sound System and GUSMAX products
@c man end