diff -Naur qemu-0.9.0/hw/pc.c qemu-0.9.0-ohci-patch/hw/pc.c
--- qemu-0.9.0/hw/pc.c	2007-02-06 00:01:54.000000000 +0100
+++ qemu-0.9.0-ohci-patch/hw/pc.c	2007-03-29 15:43:18.000000000 +0200
@@ -695,7 +695,10 @@
     cmos_init(ram_size, boot_device, bs_table);
 
     if (pci_enabled && usb_enabled) {
-        usb_uhci_init(pci_bus, piix3_devfn + 2);
+        if (use_ohci_instead)
+	    usb_ohci_init(pci_bus, 3, -1);
+	else
+            usb_uhci_init(pci_bus, piix3_devfn + 2);
     }
 
     if (pci_enabled && acpi_enabled) {
diff -Naur qemu-0.9.0/vl.c qemu-0.9.0-ohci-patch/vl.c
--- qemu-0.9.0/vl.c	2007-02-06 00:01:54.000000000 +0100
+++ qemu-0.9.0-ohci-patch/vl.c	2007-03-29 15:44:52.000000000 +0200
@@ -155,6 +155,7 @@
 int win2k_install_hack = 0;
 #endif
 int usb_enabled = 0;
+int use_ohci_instead = 0;
 static VLANState *first_vlan;
 int smp_cpus = 1;
 const char *vnc_display;
@@ -6048,6 +6049,7 @@
            "-win2k-hack     use it when installing Windows 2000 to avoid a disk full bug\n"
 #endif
            "-usb            enable the USB driver (will be the default soon)\n"
+	   "-ohci           use the OHCI controller instead of the UHCI\n"
            "-usbdevice name add the host or guest USB device 'name'\n"
 #if defined(TARGET_PPC) || defined(TARGET_SPARC)
            "-g WxH[xDEPTH]  Set the initial graphical resolution and depth\n"
@@ -6198,6 +6200,7 @@
     QEMU_OPTION_kernel_kqemu,
     QEMU_OPTION_win2k_hack,
     QEMU_OPTION_usb,
+    QEMU_OPTION_ohci,
     QEMU_OPTION_usbdevice,
     QEMU_OPTION_smp,
     QEMU_OPTION_vnc,
@@ -6284,6 +6287,7 @@
 
     /* temporary options */
     { "usb", 0, QEMU_OPTION_usb },
+    { "ohci", 0, QEMU_OPTION_ohci },
     { "cirrusvga", 0, QEMU_OPTION_cirrusvga },
     { "no-acpi", 0, QEMU_OPTION_no_acpi },
     { "no-reboot", 0, QEMU_OPTION_no_reboot },
@@ -6917,6 +6921,9 @@
             case QEMU_OPTION_usb:
                 usb_enabled = 1;
                 break;
+	    case QEMU_OPTION_ohci:
+	        use_ohci_instead = 1;
+		break;
             case QEMU_OPTION_usbdevice:
                 usb_enabled = 1;
                 if (usb_devices_index >= MAX_USB_CMDLINE) {
diff -Naur qemu-0.9.0/vl.h qemu-0.9.0-ohci-patch/vl.h
--- qemu-0.9.0/vl.h	2007-02-06 00:01:54.000000000 +0100
+++ qemu-0.9.0-ohci-patch/vl.h	2007-03-29 15:42:19.000000000 +0200
@@ -155,6 +155,7 @@
 extern int kqemu_allowed;
 extern int win2k_install_hack;
 extern int usb_enabled;
+extern int use_ohci_instead;
 extern int smp_cpus;
 extern int no_quit;
 extern int semihosting_enabled;