diff --git a/hw/ich9.h b/hw/ich9.h
index de491350c3..34e216f142 100644
--- a/hw/ich9.h
+++ b/hw/ich9.h
@@ -51,6 +51,7 @@ typedef struct ICH9LPCState {
     /* isa bus */
     ISABus *isa_bus;
     MemoryRegion rbca_mem;
+    Notifier machine_ready;
 
     qemu_irq *pic;
     qemu_irq *ioapic;
diff --git a/hw/lpc_ich9.c b/hw/lpc_ich9.c
index 2fc83a496f..6585236148 100644
--- a/hw/lpc_ich9.c
+++ b/hw/lpc_ich9.c
@@ -60,6 +60,7 @@
 #include "pam.h"
 #include "pci_internals.h"
 #include "exec-memory.h"
+#include "sysemu.h"
 
 static int ich9_lpc_sci_irq(ICH9LPCState *lpc);
 
@@ -456,6 +457,30 @@ static const MemoryRegionOps rbca_mmio_ops = {
     .endianness = DEVICE_LITTLE_ENDIAN,
 };
 
+static void ich9_lpc_machine_ready(Notifier *n, void *opaque)
+{
+    ICH9LPCState *s = container_of(n, ICH9LPCState, machine_ready);
+    uint8_t *pci_conf;
+
+    pci_conf = s->d.config;
+    if (isa_is_ioport_assigned(0x3f8)) {
+        /* com1 */
+        pci_conf[0x82] |= 0x01;
+    }
+    if (isa_is_ioport_assigned(0x2f8)) {
+        /* com2 */
+        pci_conf[0x82] |= 0x02;
+    }
+    if (isa_is_ioport_assigned(0x378)) {
+        /* lpt */
+        pci_conf[0x82] |= 0x04;
+    }
+    if (isa_is_ioport_assigned(0x3f0)) {
+        /* floppy */
+        pci_conf[0x82] |= 0x08;
+    }
+}
+
 static int ich9_lpc_initfn(PCIDevice *d)
 {
     ICH9LPCState *lpc = ICH9_LPC_DEVICE(d);
@@ -473,6 +498,10 @@ static int ich9_lpc_initfn(PCIDevice *d)
 
     ich9_cc_init(lpc);
     apm_init(&lpc->apm, ich9_apm_ctrl_changed, lpc);
+
+    lpc->machine_ready.notify = ich9_lpc_machine_ready;
+    qemu_add_machine_init_done_notifier(&lpc->machine_ready);
+
     return 0;
 }
 
diff --git a/hw/smbus_ich9.c b/hw/smbus_ich9.c
index 54e7e1252d..4194785d71 100644
--- a/hw/smbus_ich9.c
+++ b/hw/smbus_ich9.c
@@ -77,18 +77,6 @@ static int ich9_smbus_initfn(PCIDevice *d)
     /* TODO? D31IP.SMIP in chipset configuration space */
     pci_config_set_interrupt_pin(d->config, 0x01); /* interrupt pin 1 */
 
-    pci_set_byte(d->config + ICH9_SMB_HOSTC, 0);
-
-    /*
-     * update parameters based on
-     * paralell_hds[0]
-     * serial_hds[0]
-     * serial_hds[0]
-     * fdc
-     *
-     * Is there any OS that depends on them?
-     */
-
     pci_set_byte(d->config + ICH9_SMB_HOSTC, 0);
     /* TODO bar0, bar1: 64bit BAR support*/