2014-01-25  Mikael Pettersson  <mikpelinux@gmail.com>

	* src/ssc.h: define SSC_HALT_LIGHT
	* src/linux/syscall-linux.c: handle SSC_HALT_LIGHT

diff -rupN ski-1.3.2/src/linux/syscall-linux.c ski-1.3.2.SSC_HALT_LIGHT/src/linux/syscall-linux.c
--- ski-1.3.2/src/linux/syscall-linux.c	2008-02-05 05:11:38.000000000 +0100
+++ ski-1.3.2.SSC_HALT_LIGHT/src/linux/syscall-linux.c	2014-01-25 13:03:25.278559174 +0100
@@ -4393,6 +4393,13 @@ doSSC (HWORD num, REG arg0, REG arg1, RE
       progStop ("SSC breakpoint\n");
       break;
 
+    case SSC_HALT_LIGHT:
+      /* Sleep until SIGIO or SIGALRM is received; this relies on
+	 keyboard/ethernet input being detected via SIGIO, and the
+	 ITC now being emulated via setitimer() and SIGALRM.  */
+      pause ();
+      break;
+
     case SSC_CTL_TRACE:
 #ifdef TRACE_DAVIDM
       {
diff -rupN ski-1.3.2/src/ssc.h ski-1.3.2.SSC_HALT_LIGHT/src/ssc.h
--- ski-1.3.2/src/ssc.h	2008-02-05 05:11:38.000000000 +0100
+++ ski-1.3.2.SSC_HALT_LIGHT/src/ssc.h	2014-01-25 13:03:25.278559174 +0100
@@ -28,6 +28,7 @@
 
 #define SSC_STOP			 0
 
+#define SSC_HALT_LIGHT			19
 #define SSC_CONSOLE_INIT		20
 #define SSC_GETCHAR			21
 #define SSC_PUTCHAR			31