diff --git a/sys/dev/ep/if_ep.c b/sys/dev/ep/if_ep.c
index a332304ca7ea..b95200036010 100644
--- a/sys/dev/ep/if_ep.c
+++ b/sys/dev/ep/if_ep.c
@@ -38,7 +38,7 @@
  */
 
 /*
- *  $Id: if_ep.c,v 1.79 1999/01/31 22:41:51 dufault Exp $
+ *  $Id: if_ep.c,v 1.80 1999/07/06 19:22:46 des Exp $
  *
  *  Promiscuous mode added and interrupt logic slightly changed
  *  to reduce the number of adapter failures. Transceiver select
@@ -193,13 +193,24 @@ ep_pccard_init(devi)
     /* get_e() requires these. */
     sc->ep_io_addr = is->id_iobase;
     sc->unit = is->id_unit;
+    epb->cmd_off = 0;
+    if (is->id_flags & EP_FLAGS_100TX) 
+	epb->cmd_off = 2;
 
     epb->epb_addr = is->id_iobase;
     epb->epb_used = 1;
     epb->prod_id = get_e(sc, EEPROM_PROD_ID);
+    epb->mii_trans = 0;
 
-    /* 3C589's product id? */
-    if (epb->prod_id != 0x9058) {
+    /* product id */
+    switch (epb->prod_id) {
+      case 0x6055: /* 3C556 */
+      case 0x4057: /* 3C574 */
+	epb->mii_trans = 1;
+	break;
+      case 0x9058: /* 3C589 */
+	break;
+      default:
 	printf("ep%d: failed to come ready.\n", is->id_unit);
 	return (ENXIO);
     }
@@ -232,7 +243,7 @@ ep_pccard_attach(devi)
 	sc->ep_connectors |= UTP;
     }
     if (!(sc->ep_connectors & 7))
-	printf("no connectors!");
+	printf("ep%d: No connectors or MII.\n", is->id_unit);
     sc->ep_connector = inw(BASE + EP_W0_ADDRESS_CFG) >> ACF_CONNECTOR_BITS;
 
     /* ROM size = 0, ROM base = 0 */
@@ -244,6 +255,21 @@ ep_pccard_attach(devi)
 
     outw(BASE + EP_W0_PRODUCT_ID, sc->epb->prod_id);
 
+    if (sc->epb->mii_trans) {
+	/*
+	 * turn on the MII tranceiver
+	 */
+	GO_WINDOW(3);
+	outw(BASE + EP_W3_OPTIONS, 0x8040);
+	DELAY(1000);
+	outw(BASE + EP_W3_OPTIONS, 0xc040);
+	outw(BASE + EP_COMMAND, RX_RESET);
+	outw(BASE + EP_COMMAND, TX_RESET);
+	while (inw(BASE + EP_STATUS) & S_COMMAND_IN_PROGRESS);
+	DELAY(1000);
+	outw(BASE + EP_W3_OPTIONS, 0x8040);
+    }
+
     ep_attach(sc);
 
     return 1;
@@ -417,7 +443,7 @@ get_e(sc, offset)
 {
     if (!eeprom_rdy(sc))
 	return (0xffff);
-    outw(BASE + EP_W0_EEPROM_COMMAND, EEPROM_CMD_RD | offset);
+    outw(BASE + EP_W0_EEPROM_COMMAND, (EEPROM_CMD_RD << sc->epb->cmd_off) | offset);
     if (!eeprom_rdy(sc))
 	return (0xffff);
     return (inw(BASE + EP_W0_EEPROM_DATA));
diff --git a/sys/dev/ep/if_epreg.h b/sys/dev/ep/if_epreg.h
index 707f8a6d27f2..997b228d01f7 100644
--- a/sys/dev/ep/if_epreg.h
+++ b/sys/dev/ep/if_epreg.h
@@ -31,7 +31,7 @@
 
  */
 /*
- *  $Id: if_epreg.h,v 1.22 1997/10/27 06:15:10 joerg Exp $
+ *  $Id: if_epreg.h,v 1.23 1998/04/17 22:36:35 des Exp $
  *
  *  Promiscuous mode added and interrupt logic slightly changed
  *  to reduce the number of adapter failures. Transceiver select
@@ -86,6 +86,8 @@ struct ep_board {
 				/* data from EEPROM for later use */
 	u_short eth_addr[3];	/* Ethernet address */
 	u_short prod_id;	/* product ID */
+	int	cmd_off;	/* command offset (bit shift) */
+	int	mii_trans;	/* activate MII transiever */
 	u_short res_cfg;	/* resource configuration */
 };
 
@@ -221,6 +223,7 @@ struct ep_board {
 /* Read */
 #define EP_W3_FREE_TX		0x0c
 #define EP_W3_FREE_RX		0x0a
+#define EP_W3_OPTIONS		0x08
 
 /*
  * Window 4 registers. Diagnostics.
@@ -461,3 +464,8 @@ extern	void  ep_intr __P((void *sc));
 extern 	int ep_attach __P((struct ep_softc *sc));
 
 extern	u_int16_t get_e __P((struct ep_softc *sc, int offset));
+
+/*
+ * Config flags
+ */
+#define EP_FLAGS_100TX			0x1
diff --git a/sys/i386/isa/if_ep.c b/sys/i386/isa/if_ep.c
index a332304ca7ea..b95200036010 100644
--- a/sys/i386/isa/if_ep.c
+++ b/sys/i386/isa/if_ep.c
@@ -38,7 +38,7 @@
  */
 
 /*
- *  $Id: if_ep.c,v 1.79 1999/01/31 22:41:51 dufault Exp $
+ *  $Id: if_ep.c,v 1.80 1999/07/06 19:22:46 des Exp $
  *
  *  Promiscuous mode added and interrupt logic slightly changed
  *  to reduce the number of adapter failures. Transceiver select
@@ -193,13 +193,24 @@ ep_pccard_init(devi)
     /* get_e() requires these. */
     sc->ep_io_addr = is->id_iobase;
     sc->unit = is->id_unit;
+    epb->cmd_off = 0;
+    if (is->id_flags & EP_FLAGS_100TX) 
+	epb->cmd_off = 2;
 
     epb->epb_addr = is->id_iobase;
     epb->epb_used = 1;
     epb->prod_id = get_e(sc, EEPROM_PROD_ID);
+    epb->mii_trans = 0;
 
-    /* 3C589's product id? */
-    if (epb->prod_id != 0x9058) {
+    /* product id */
+    switch (epb->prod_id) {
+      case 0x6055: /* 3C556 */
+      case 0x4057: /* 3C574 */
+	epb->mii_trans = 1;
+	break;
+      case 0x9058: /* 3C589 */
+	break;
+      default:
 	printf("ep%d: failed to come ready.\n", is->id_unit);
 	return (ENXIO);
     }
@@ -232,7 +243,7 @@ ep_pccard_attach(devi)
 	sc->ep_connectors |= UTP;
     }
     if (!(sc->ep_connectors & 7))
-	printf("no connectors!");
+	printf("ep%d: No connectors or MII.\n", is->id_unit);
     sc->ep_connector = inw(BASE + EP_W0_ADDRESS_CFG) >> ACF_CONNECTOR_BITS;
 
     /* ROM size = 0, ROM base = 0 */
@@ -244,6 +255,21 @@ ep_pccard_attach(devi)
 
     outw(BASE + EP_W0_PRODUCT_ID, sc->epb->prod_id);
 
+    if (sc->epb->mii_trans) {
+	/*
+	 * turn on the MII tranceiver
+	 */
+	GO_WINDOW(3);
+	outw(BASE + EP_W3_OPTIONS, 0x8040);
+	DELAY(1000);
+	outw(BASE + EP_W3_OPTIONS, 0xc040);
+	outw(BASE + EP_COMMAND, RX_RESET);
+	outw(BASE + EP_COMMAND, TX_RESET);
+	while (inw(BASE + EP_STATUS) & S_COMMAND_IN_PROGRESS);
+	DELAY(1000);
+	outw(BASE + EP_W3_OPTIONS, 0x8040);
+    }
+
     ep_attach(sc);
 
     return 1;
@@ -417,7 +443,7 @@ get_e(sc, offset)
 {
     if (!eeprom_rdy(sc))
 	return (0xffff);
-    outw(BASE + EP_W0_EEPROM_COMMAND, EEPROM_CMD_RD | offset);
+    outw(BASE + EP_W0_EEPROM_COMMAND, (EEPROM_CMD_RD << sc->epb->cmd_off) | offset);
     if (!eeprom_rdy(sc))
 	return (0xffff);
     return (inw(BASE + EP_W0_EEPROM_DATA));
diff --git a/sys/i386/isa/if_epreg.h b/sys/i386/isa/if_epreg.h
index 707f8a6d27f2..997b228d01f7 100644
--- a/sys/i386/isa/if_epreg.h
+++ b/sys/i386/isa/if_epreg.h
@@ -31,7 +31,7 @@
 
  */
 /*
- *  $Id: if_epreg.h,v 1.22 1997/10/27 06:15:10 joerg Exp $
+ *  $Id: if_epreg.h,v 1.23 1998/04/17 22:36:35 des Exp $
  *
  *  Promiscuous mode added and interrupt logic slightly changed
  *  to reduce the number of adapter failures. Transceiver select
@@ -86,6 +86,8 @@ struct ep_board {
 				/* data from EEPROM for later use */
 	u_short eth_addr[3];	/* Ethernet address */
 	u_short prod_id;	/* product ID */
+	int	cmd_off;	/* command offset (bit shift) */
+	int	mii_trans;	/* activate MII transiever */
 	u_short res_cfg;	/* resource configuration */
 };
 
@@ -221,6 +223,7 @@ struct ep_board {
 /* Read */
 #define EP_W3_FREE_TX		0x0c
 #define EP_W3_FREE_RX		0x0a
+#define EP_W3_OPTIONS		0x08
 
 /*
  * Window 4 registers. Diagnostics.
@@ -461,3 +464,8 @@ extern	void  ep_intr __P((void *sc));
 extern 	int ep_attach __P((struct ep_softc *sc));
 
 extern	u_int16_t get_e __P((struct ep_softc *sc, int offset));
+
+/*
+ * Config flags
+ */
+#define EP_FLAGS_100TX			0x1