--- a/libpwon/forkoff.c	Tue Sep 15 04:29:43 2020 +0000
+++ b/libpwon/forkoff.c	Wed Sep 16 03:40:51 2020 +0000
@@ -5,6 +5,7 @@
 #include <unistd.h>
 
 extern char bootctrl_pwon_cmd[];
+extern int bootctrl_duart28c_mode;
 
 static char shell_pathname[] = "/bin/sh";
 
@@ -27,9 +28,15 @@
 
 pwon_if_needed()
 {
-	if (!bootctrl_pwon_cmd[0])
-		return(0);
-	signal(SIGCHLD, SIG_IGN);
-	fork_exec_pwon_cmd();
-	return(1);
+	if (bootctrl_duart28c_mode) {
+		signal(SIGCHLD, SIG_IGN);
+		fork_duart28c_pulse();
+		return(1);
+	}
+	if (bootctrl_pwon_cmd[0]) {
+		signal(SIGCHLD, SIG_IGN);
+		fork_exec_pwon_cmd();
+		return(1);
+	}
+	return(0);
 }