--- /usr/ports/emulators/doscmd/work/doscmd-20040330/bios.c	Mon Mar 29 16:00:00 2004
+++ bios.c	Mon May  1 18:39:31 2006
@@ -31,6 +31,7 @@
  */
 
 #include <sys/cdefs.h>
+#include <time.h>
 __FBSDID("$FreeBSD: projects/doscmd/bios.c,v 1.9 2002/03/07 12:52:26 obrien Exp $");
 
 #include "doscmd.h"
@@ -110,6 +111,7 @@
 static void
 int15(regcontext_t *REGS)
 {
+    const struct timespec rqtp={0,1};
     R_FLAGS &= ~PSL_C;
 
     switch (R_AH) {
@@ -119,6 +121,17 @@
 	break;
     case 0x04:			/* Set ABIOS table */
 	R_FLAGS |= PSL_C;	/* We don't support it */
+	break;
+    case 0x10:			/* DesqView */
+	switch (R_AL) {
+	    case 0x00:		/* Give up CPU time */
+		nanosleep(&rqtp, NULL);
+		break;
+	    case 0x22:		/* Get version */
+		R_BH = 0x0a;	/* Use v2.0 for timeslice support */
+		R_BL = 0x01;
+		break;
+	}
 	break;
     case 0x4f:			/* Keyboard intercept */
 	debug(D_TRAPS | 0x15, "BIOS: Keyboard intercept\n");