diff -ur qemu-orig/vl.c qemu-vncport/vl.c
--- qemu-orig/vl.c	2004-11-26 14:28:08.000000000 -0600
+++ qemu-vncport/vl.c	2004-11-26 14:23:45.000000000 -0600
@@ -113,6 +113,7 @@
 static DisplayState display_state;
 int nographic;
 int usevnc; /* 1=vnc only, 2=vnc and sdl */
+int vnc_port = 0;
 const char* keyboard_layout = 0;
 int64_t ticks_per_sec;
 int boot_device = 'c';
@@ -2505,6 +2506,7 @@
            "-nographic      disable graphical output and redirect serial I/Os to console\n"
 #ifdef CONFIG_VNC
 	   "-vnc            use vnc instead of sdl\n"
+	   "-vncport <port> use this vnc port. Default is auto-choosing\n"
 #ifdef CONFIG_SDL
 	   "-vnc-and-sdl    use vnc and sdl simultaneously\n"
 #endif
@@ -2599,6 +2601,7 @@
     QEMU_OPTION_boot,
     QEMU_OPTION_snapshot,
     QEMU_OPTION_m,
+    QEMU_OPTION_vncport,
     QEMU_OPTION_nographic,
 #ifdef CONFIG_VNC
     QEMU_OPTION_vnc,
@@ -2662,6 +2665,7 @@
     { "boot", HAS_ARG, QEMU_OPTION_boot },
     { "snapshot", 0, QEMU_OPTION_snapshot },
     { "m", HAS_ARG, QEMU_OPTION_m },
+    { "vncport", HAS_ARG, QEMU_OPTION_vncport },
     { "nographic", 0, QEMU_OPTION_nographic },
 #ifdef CONFIG_VNC
     { "vnc", 0, QEMU_OPTION_vnc },
@@ -3041,6 +3045,9 @@
                     exit(1);
                 }
                 break;
+            case QEMU_OPTION_vncport:
+                vnc_port = atoi(optarg);
+		break;
             case QEMU_OPTION_d:
                 {
                     int mask;
diff -ur qemu-orig/vnc.c qemu-vncport/vnc.c
--- qemu-orig/vnc.c	2004-11-26 14:28:08.000000000 -0600
+++ qemu-vncport/vnc.c	2004-11-26 14:17:29.000000000 -0600
@@ -342,6 +342,7 @@
 
 #include <SDL/SDL_video.h>
 extern SDL_PixelFormat* sdl_get_format();
+extern int vnc_port;
 
 static void vnc_resize(DisplayState *ds, int w, int h)
 {
@@ -529,6 +530,15 @@
 
 	screen->desktopName = "QEMU/VNC";
 	screen->cursor = 0;
+
+	/* Did we get a VNC port in the command line? */
+	if (vnc_port) {
+	   screen->autoPort = FALSE;
+	   screen->port = vnc_port;
+	}
+	else
+	   screen->autoPort = TRUE;
+
 	screen->kbdAddEvent = vnc_process_key;
 	screen->ptrAddEvent = vnc_process_mouse;
 	rfbInitServer(screen);