1 files changed, 35 insertions, 0 deletions
diff --git a/pkg/images/tv/iis/iism70/iisopn.x b/pkg/images/tv/iis/iism70/iisopn.x
new file mode 100644
index 00000000..29335c62
--- /dev/null
+++ b/pkg/images/tv/iis/iism70/iisopn.x
@@ -0,0 +1,35 @@
+# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
+
+include	<mach.h>
+include <knet.h>
+include "iis.h"
+
+# IISOPN -- Open IIS display.
+
+procedure iisopn (devinfo, mode, chan)
+
+char	devinfo[ARB]		# device info for zopen
+int	mode			# access mode
+int	chan[ARB]		# receives IIS descriptor
+
+bool	first_time
+data	first_time /true/
+include	"iis.com"
+
+begin
+	if (first_time) {
+	    iisnopen = 0
+	    first_time = false
+	}
+
+	# We permit multiple opens but only open the physical device once.
+	if (iisnopen == 0)
+	    call zopngd (devinfo, mode, iischan)
+
+	if (iischan == ERR)
+	    chan[1] = ERR
+	else {
+	    iisnopen = iisnopen + 1
+	    chan[1]  = iischan
+	}
+end