diff --git a/sys/dev/ata/ata-chipset.c b/sys/dev/ata/ata-chipset.c
index 6e37c10bf816..00e97f9c2359 100644
--- a/sys/dev/ata/ata-chipset.c
+++ b/sys/dev/ata/ata-chipset.c
@@ -1561,12 +1561,13 @@ ata_sii_ident(device_t dev)
     struct ata_pci_controller *ctlr = device_get_softc(dev);
     struct ata_chip_id *idx;
     static struct ata_chip_id ids[] =
-    {{ ATA_SII3112, 0x00, SIIMEMIO, 0,	       ATA_SA150, "SiI 3112" },
-     { ATA_SII0680, 0x00, SIIMEMIO, SIISETCLK, ATA_UDMA6, "SiI 0680" },
-     { ATA_CMD649,  0x00, 0,	    SIIINTR,   ATA_UDMA5, "CMD 649" },
-     { ATA_CMD648,  0x00, 0,	    SIIINTR,   ATA_UDMA4, "CMD 648" },
-     { ATA_CMD646,  0x07, 0,	    0,	       ATA_UDMA2, "CMD 646U2" },
-     { ATA_CMD646,  0x00, 0,	    0,	       ATA_WDMA2, "CMD 646" },
+    {{ ATA_SII3112,   0x00, SIIMEMIO, 0,	 ATA_SA150, "SiI 3112" },
+     { ATA_SII3112_1, 0x00, SIIMEMIO, 0,	 ATA_SA150, "SiI 3112" },
+     { ATA_SII0680,   0x00, SIIMEMIO, SIISETCLK, ATA_UDMA6, "SiI 0680" },
+     { ATA_CMD649,    0x00, 0,	      SIIINTR,   ATA_UDMA5, "CMD 649" },
+     { ATA_CMD648,    0x00, 0,	      SIIINTR,   ATA_UDMA4, "CMD 648" },
+     { ATA_CMD646,    0x07, 0,	      0,	 ATA_UDMA2, "CMD 646U2" },
+     { ATA_CMD646,    0x00, 0,	      0,	 ATA_WDMA2, "CMD 646" },
      { 0, 0, 0, 0, 0, 0}};
     char buffer[64];
 
@@ -1606,11 +1607,15 @@ ata_sii_chipinit(device_t dev)
 	if (ctlr->chip->cfg2 & SIISETCLK) {
 	    if ((pci_read_config(dev, 0x8a, 1) & 0x30) != 0x10)
 		pci_write_config(dev, 0x8a, 
-				 (pci_read_config(dev, 0x8a, 1) & 0x0F)|0x10,1);
+				 (pci_read_config(dev, 0x8a, 1) & 0xcf)|0x10,1);
 	    if ((pci_read_config(dev, 0x8a, 1) & 0x30) != 0x10)
 		device_printf(dev, "%s could not set ATA133 clock\n",
 			      ctlr->chip->text);
 	}
+
+	/* enable interrupt as BIOS might not */
+	pci_write_config(dev, 0x8a, (pci_read_config(dev, 0x8a, 1) & 0x3f), 1);
+
 	ctlr->allocate = ata_sii_mio_allocate;
 	ctlr->setmode = ata_sii_setmode;
     }
diff --git a/sys/dev/ata/ata-pci.h b/sys/dev/ata/ata-pci.h
index a976f9421f48..32aceb920732 100644
--- a/sys/dev/ata/ata-pci.h
+++ b/sys/dev/ata/ata-pci.h
@@ -160,6 +160,7 @@ struct ata_pci_controller {
 #define ATA_SILICON_IMAGE_ID	0x1095
 #define ATA_SII0680		0x06801095
 #define ATA_SII3112		0x31121095
+#define ATA_SII3112_1		0x02401095
 #define ATA_CMD646		0x06461095
 #define ATA_CMD648		0x06481095
 #define ATA_CMD649		0x06491095