1 files changed, 5 insertions, 2 deletions

diff --git a/firmware/thread.c b/firmware/thread.c
index d59c05e1fc..d79c53834e 100644
--- a/firmware/thread.c
+++ b/firmware/thread.c
@@ -188,8 +188,11 @@ void switch_thread(void)
 #if CONFIG_CPU == MCF5249
         asm volatile ("stop #0x2000");
 #elif CONFIG_CPU == TCC730
-        /* No sleep instr on the CalmRisc. (?)
-         * TODO: investigate the SYS instruction
+        /* Sleep mode is triggered by the SYS instr on CalmRisc16.
+         * Unfortunately, the manual doesn't specify which arg to use.
+         __asm__ volatile ("sys #0x0f");
+         0x1f seems to trigger a reset;
+         0x0f is the only one other argument used by Archos.
          */
 #else
         SBYCR &= 0x7F;