diff --git a/src/northsouthbridge/sis/630/southbridge.c b/src/northsouthbridge/sis/630/southbridge.c
index cd87312e16..ca653443ae 100644
--- a/src/northsouthbridge/sis/630/southbridge.c
+++ b/src/northsouthbridge/sis/630/southbridge.c
@@ -82,6 +82,33 @@ final_southbridge_fixup()
 
 	    // set the interrupt to 'b'
 	    pci_write_config_byte(pcidev, PCI_INTERRUPT_LINE, 0xb);
+	} else {
+	    printk(KERN_ERR "Can't find ethernet interface\n");
+	}
+
+	// fix up southbridge interrupt enables. 
+	pcidev = pci_find_device(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_503, 
+	    (void *)NULL);
+	if (pcidev != NULL) {
+	    // put symbolic names in here soon ... so much typing, so little time. 
+
+	    // remap IRQ for PCI -- this is exactly what the BIOS does now. 
+	    pci_write_config_byte(pcidev, 0x42, 0xa);
+	    pci_write_config_byte(pcidev, 0x43, 0xb);
+	    pci_write_config_byte(pcidev, 0x44, 0xc);
+
+	    // now set up legacy serial interrupts
+	    // that doesn't mean serial ports -- it's a serial interrupt
+	    // line from the superio (LPC)
+	    // first, enable them. 
+	    pci_write_config_byte(pcidev, 0x70, 0x80); 
+	    // skip the SMI, inta, etc. stuff. 
+	    // enable IRQs 7 to 1
+	    pci_write_config_byte(pcidev, 0x72, 0xfd);
+	    pci_write_config_byte(pcidev, 0x73, 0xff);
+	    
+	} else {
+	    printk(KERN_EMERG "Can't find south bridge!\n");
 	}
 
 	printk(KERN_INFO "Southbridge fixup done for SIS 503\n");