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diff --git a/reference/C/CONTRIB/SNIP/droptime.c b/reference/C/CONTRIB/SNIP/droptime.c
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+/** int drop_time(void)
+**
+** Drops current timeslice in OS/2, Win, DPMI 1.0 and (I think) DV
+**
+** Returns: 0 if not successful, 1 if dropped
+**
+** Based on Ralf Brown's Interrupt list.
+** Donated to Public Domain by Thor Johnson.
+**
+***********************************************************************/
+
+#include <dos.h>
+
+int drop_time(void) /* Drops Time-slice, giving to another program */
+{
+ union REGS regs;
+
+ regs.x.ax = 0x1680;
+ int86(0x2f, &regs, &regs);
+ return (regs.h.al == 0x80)? 0 : 1;
+}