From d88831a6d96ccfc61a40c61c336e0b0b03ff09be Mon Sep 17 00:00:00 2001
From: David du Colombier <0intro@gmail.com>
Date: Sun, 20 Feb 1994 00:00:00 +0000
Subject: [PATCH] Plan 9 from Bell Labs 1994-02-20

---
 carrera/trap.c | 18 +++++++++++++-----
 1 file changed, 13 insertions(+), 5 deletions(-)

diff --git a/carrera/trap.c b/carrera/trap.c
index 92fa6225cd26ed201c380e8870cded4291b7885d..57fb0fd5df3910c97da4e7fd6479fefcb0724e0a 100644
--- a/carrera/trap.c
+++ b/carrera/trap.c
@@ -289,6 +289,7 @@ intr(Ureg *ur)
 {
 	static uchar devint;
 	ulong cause = ur->cause;
+	ulong isr;
 
 	m->intr++;
 	cause &= INTR7|INTR6|INTR5|INTR4|INTR3|INTR2|INTR1|INTR0;
@@ -317,11 +318,18 @@ intr(Ureg *ur)
 		cause &= ~INTR3;
 	}
 	if(cause & INTR2) {
-		iprint("R4030 Interrupt\n");
-		iprint(" ISR #%lux\n", IO(ulong, R4030Isr));
-		iprint(" ET  #%lux\n", IO(ulong, R4030Et));
-		iprint(" RFA #%lux\n", IO(ulong, R4030Rfa));
-		iprint(" MFA #%lux\n", IO(ulong, R4030Mfa));
+		isr = IO(ulong, R4030Isr);
+		if(isr & (1<<5)) {
+			audiointr();
+			isr &= ~(1<<5);
+		}
+		if(isr) {
+			iprint("R4030 Interrupt\n");
+			iprint(" ISR #%lux\n", IO(ulong, R4030Isr));
+			iprint(" ET  #%lux\n", IO(ulong, R4030Et));
+			iprint(" RFA #%lux\n", IO(ulong, R4030Rfa));
+			iprint(" MFA #%lux\n", IO(ulong, R4030Mfa));
+		}
 		cause &= ~INTR2;
 	}
 	if(cause & INTR4) {