diff --git a/sys/dev/cy/cy.c b/sys/dev/cy/cy.c
index 187a3e9e19c9..1d41b5bf3455 100644
--- a/sys/dev/cy/cy.c
+++ b/sys/dev/cy/cy.c
@@ -27,7 +27,7 @@
  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
- *	$Id: cy.c,v 1.72 1998/10/22 05:58:38 bde Exp $
+ *	$Id: cy.c,v 1.73 1998/11/22 17:40:32 bde Exp $
  */
 
 #include "opt_compat.h"
@@ -432,11 +432,11 @@ sioprobe(dev)
 	iobase = (cy_addr)dev->id_maddr;
 
 	/* Cyclom-16Y hardware reset (Cyclom-8Ys don't care) */
-	cd_inb(iobase, CY16_RESET, 0);	/* XXX? */
+	cy_inb(iobase, CY16_RESET, 0);	/* XXX? */
 	DELAY(500);	/* wait for the board to get its act together */
 
 	/* this is needed to get the board out of reset */
-	cd_outb(iobase, CY_CLEAR_INTR, 0, 0);
+	cy_outb(iobase, CY_CLEAR_INTR, 0, 0);
 	DELAY(500);
 
 	return (cy_units(iobase, 0) == 0 ? 0 : -1);
@@ -646,7 +646,7 @@ cyattach_common(cy_iobase, cy_align)
 	}
 
 	/* ensure an edge for the next interrupt */
-	cd_outb(cy_iobase, CY_CLEAR_INTR, cy_align, 0);
+	cy_outb(cy_iobase, CY_CLEAR_INTR, cy_align, 0);
 
 	return (adapter);
 }
@@ -1068,7 +1068,7 @@ siointr(unit)
 					  & CD1400_xIVR_CHAN));
 #else
 			/* ack receive service */
-			serv_type = cy_inb(iobase, CY8_SVCACKR);
+			serv_type = cy_inb(iobase, CY8_SVCACKR, cy_align);
 
 			com = com_addr(baseu +
 				       + ((serv_type >> CD1400_xIVR_CHAN_SHIFT)
@@ -1241,7 +1241,7 @@ siointr(unit)
 				       + (save_mir & CD1400_MIR_CHAN));
 #else
 			/* ack modem service */
-			vector = cy_inb(iobase, CY8_SVCACKM);
+			vector = cy_inb(iobase, CY8_SVCACKM, cy_align);
 
 			com = com_addr(baseu
 				       + ((vector >> CD1400_xIVR_CHAN_SHIFT)
@@ -1324,7 +1324,7 @@ siointr(unit)
 				       + (save_tir & CD1400_TIR_CHAN));
 #else
 			/* ack transmit service */
-			vector = cy_inb(iobase, CY8_SVCACKT);
+			vector = cy_inb(iobase, CY8_SVCACKT, cy_align);
 
 			com = com_addr(baseu
 				       + ((vector >> CD1400_xIVR_CHAN_SHIFT)
@@ -1384,7 +1384,7 @@ siointr(unit)
 	}
 
 	/* ensure an edge for the next interrupt */
-	cd_outb(cy_iobase, CY_CLEAR_INTR, cy_align, 0);
+	cy_outb(cy_iobase, CY_CLEAR_INTR, cy_align, 0);
 
 	schedsofttty();
 
diff --git a/sys/dev/cy/cy_isa.c b/sys/dev/cy/cy_isa.c
index 187a3e9e19c9..1d41b5bf3455 100644
--- a/sys/dev/cy/cy_isa.c
+++ b/sys/dev/cy/cy_isa.c
@@ -27,7 +27,7 @@
  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
- *	$Id: cy.c,v 1.72 1998/10/22 05:58:38 bde Exp $
+ *	$Id: cy.c,v 1.73 1998/11/22 17:40:32 bde Exp $
  */
 
 #include "opt_compat.h"
@@ -432,11 +432,11 @@ sioprobe(dev)
 	iobase = (cy_addr)dev->id_maddr;
 
 	/* Cyclom-16Y hardware reset (Cyclom-8Ys don't care) */
-	cd_inb(iobase, CY16_RESET, 0);	/* XXX? */
+	cy_inb(iobase, CY16_RESET, 0);	/* XXX? */
 	DELAY(500);	/* wait for the board to get its act together */
 
 	/* this is needed to get the board out of reset */
-	cd_outb(iobase, CY_CLEAR_INTR, 0, 0);
+	cy_outb(iobase, CY_CLEAR_INTR, 0, 0);
 	DELAY(500);
 
 	return (cy_units(iobase, 0) == 0 ? 0 : -1);
@@ -646,7 +646,7 @@ cyattach_common(cy_iobase, cy_align)
 	}
 
 	/* ensure an edge for the next interrupt */
-	cd_outb(cy_iobase, CY_CLEAR_INTR, cy_align, 0);
+	cy_outb(cy_iobase, CY_CLEAR_INTR, cy_align, 0);
 
 	return (adapter);
 }
@@ -1068,7 +1068,7 @@ siointr(unit)
 					  & CD1400_xIVR_CHAN));
 #else
 			/* ack receive service */
-			serv_type = cy_inb(iobase, CY8_SVCACKR);
+			serv_type = cy_inb(iobase, CY8_SVCACKR, cy_align);
 
 			com = com_addr(baseu +
 				       + ((serv_type >> CD1400_xIVR_CHAN_SHIFT)
@@ -1241,7 +1241,7 @@ siointr(unit)
 				       + (save_mir & CD1400_MIR_CHAN));
 #else
 			/* ack modem service */
-			vector = cy_inb(iobase, CY8_SVCACKM);
+			vector = cy_inb(iobase, CY8_SVCACKM, cy_align);
 
 			com = com_addr(baseu
 				       + ((vector >> CD1400_xIVR_CHAN_SHIFT)
@@ -1324,7 +1324,7 @@ siointr(unit)
 				       + (save_tir & CD1400_TIR_CHAN));
 #else
 			/* ack transmit service */
-			vector = cy_inb(iobase, CY8_SVCACKT);
+			vector = cy_inb(iobase, CY8_SVCACKT, cy_align);
 
 			com = com_addr(baseu
 				       + ((vector >> CD1400_xIVR_CHAN_SHIFT)
@@ -1384,7 +1384,7 @@ siointr(unit)
 	}
 
 	/* ensure an edge for the next interrupt */
-	cd_outb(cy_iobase, CY_CLEAR_INTR, cy_align, 0);
+	cy_outb(cy_iobase, CY_CLEAR_INTR, cy_align, 0);
 
 	schedsofttty();
 
diff --git a/sys/dev/cy/cyreg.h b/sys/dev/cy/cyreg.h
index d98cfd80ece0..baedda4175b2 100644
--- a/sys/dev/cy/cyreg.h
+++ b/sys/dev/cy/cyreg.h
@@ -26,32 +26,50 @@
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  *
- *	$Id: cyreg.h,v 1.6 1998/08/13 13:54:10 bde Exp $
+ *	$Id: cyreg.h,v 1.7 1998/08/13 19:03:22 bde Exp $
  */
 
 /*
  * Definitions for Cyclades Cyclom-Y serial boards.
  */
 
-#define	CY8_SVCACKR		0x100
-#define	CY8_SVCACKT		0x200
-#define	CY8_SVCACKM		0x300
-#define	CY16_RESET		0x0a00
-#define	CY_CLEAR_INTR		0x0c00	/* intr ack address */
+/*
+ * Cyclades register offsets.  These are physical offsets for ISA boards
+ * and physical offsets divided by 2 for PCI boards.
+ */
+#define	CY8_SVCACKR		0x100	/* (r) */
+#define	CY8_SVCACKT		0x200	/* (r) */
+#define	CY8_SVCACKM		0x300	/* (r) */
+#define	CY16_RESET		0x1400	/* (r) */
+#define	CY_CLEAR_INTR		0x1800	/* intr ack address (w) */
 
 #define	CY_MAX_CD1400s		8	/* for Cyclom-32Y */
 
 #define	CY_CLOCK(version)	((version) >= 0x48 ? 60000000 : 25000000)
 #define	CY_RTS_DTR_SWAPPED(version)	((version) >= 0x48)
 
+/*
+ * The `cd' macros are for access to cd1400 registers.  The `cy' macros
+ * are for access to Cyclades registers.  Both sets of macros scale the
+ * register number to get an offset, but the scales are different for
+ * mostly historical reasons.
+ */
 #ifdef CyDebug
-#define	cd_inb(iobase, reg, cy_align)	(++cd_inbs, *((iobase) + ((reg)*2 << (cy_align))))
-#define	cy_inb(iobase, reg)		(++cy_inbs, *((iobase) + (reg)))
-#define	cd_outb(iobase, reg, cy_align, val)	(++cd_outbs, (void)(*((iobase) + ((reg)*2 << (cy_align))) = (val)))
-#define	cy_outb(iobase, reg, val)	(++cy_outbs, (void)(*((iobase) + (reg)) = (val)))
+#define	cd_inb(iobase, reg, cy_align) \
+	(++cd_inbs, *((iobase) + (2 * (reg) << (cy_align))))
+#define	cy_inb(iobase, reg, cy_align) \
+	(++cy_inbs, *((iobase) + ((reg) << (cy_align))))
+#define	cd_outb(iobase, reg, cy_align, val) \
+	(++cd_outbs, (void)(*((iobase) + (2 * (reg) << (cy_align))) = (val)))
+#define	cy_outb(iobase, reg, cy_align, val) \
+	(++cy_outbs, (void)(*((iobase) + ((reg) << (cy_align))) = (val)))
 #else
-#define	cd_inb(iobase, reg, cy_align)	(*((iobase) + ((reg)*2 << (cy_align))))
-#define	cy_inb(iobase, reg)		(*((iobase) + (reg)))
-#define	cd_outb(iobase, reg, cy_align, val)	((void)(*((iobase) + ((reg)*2 << (cy_align))) = (val)))
-#define	cy_outb(iobase, reg, val)	((void)(*((iobase) + (reg)) = (val)))
+#define	cd_inb(iobase, reg, cy_align) \
+	(*((iobase) + (2 * (reg) << (cy_align))))
+#define	cy_inb(iobase, reg, cy_align) \
+	(*((iobase) + ((reg) << (cy_align))))
+#define	cd_outb(iobase, reg, cy_align, val) \
+	((void)(*((iobase) + (2 * (reg) << (cy_align))) = (val)))
+#define	cy_outb(iobase, reg, cy_align, val) \
+	((void)(*((iobase) + ((reg) << (cy_align))) = (val)))
 #endif
diff --git a/sys/i386/isa/cy.c b/sys/i386/isa/cy.c
index 187a3e9e19c9..1d41b5bf3455 100644
--- a/sys/i386/isa/cy.c
+++ b/sys/i386/isa/cy.c
@@ -27,7 +27,7 @@
  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
- *	$Id: cy.c,v 1.72 1998/10/22 05:58:38 bde Exp $
+ *	$Id: cy.c,v 1.73 1998/11/22 17:40:32 bde Exp $
  */
 
 #include "opt_compat.h"
@@ -432,11 +432,11 @@ sioprobe(dev)
 	iobase = (cy_addr)dev->id_maddr;
 
 	/* Cyclom-16Y hardware reset (Cyclom-8Ys don't care) */
-	cd_inb(iobase, CY16_RESET, 0);	/* XXX? */
+	cy_inb(iobase, CY16_RESET, 0);	/* XXX? */
 	DELAY(500);	/* wait for the board to get its act together */
 
 	/* this is needed to get the board out of reset */
-	cd_outb(iobase, CY_CLEAR_INTR, 0, 0);
+	cy_outb(iobase, CY_CLEAR_INTR, 0, 0);
 	DELAY(500);
 
 	return (cy_units(iobase, 0) == 0 ? 0 : -1);
@@ -646,7 +646,7 @@ cyattach_common(cy_iobase, cy_align)
 	}
 
 	/* ensure an edge for the next interrupt */
-	cd_outb(cy_iobase, CY_CLEAR_INTR, cy_align, 0);
+	cy_outb(cy_iobase, CY_CLEAR_INTR, cy_align, 0);
 
 	return (adapter);
 }
@@ -1068,7 +1068,7 @@ siointr(unit)
 					  & CD1400_xIVR_CHAN));
 #else
 			/* ack receive service */
-			serv_type = cy_inb(iobase, CY8_SVCACKR);
+			serv_type = cy_inb(iobase, CY8_SVCACKR, cy_align);
 
 			com = com_addr(baseu +
 				       + ((serv_type >> CD1400_xIVR_CHAN_SHIFT)
@@ -1241,7 +1241,7 @@ siointr(unit)
 				       + (save_mir & CD1400_MIR_CHAN));
 #else
 			/* ack modem service */
-			vector = cy_inb(iobase, CY8_SVCACKM);
+			vector = cy_inb(iobase, CY8_SVCACKM, cy_align);
 
 			com = com_addr(baseu
 				       + ((vector >> CD1400_xIVR_CHAN_SHIFT)
@@ -1324,7 +1324,7 @@ siointr(unit)
 				       + (save_tir & CD1400_TIR_CHAN));
 #else
 			/* ack transmit service */
-			vector = cy_inb(iobase, CY8_SVCACKT);
+			vector = cy_inb(iobase, CY8_SVCACKT, cy_align);
 
 			com = com_addr(baseu
 				       + ((vector >> CD1400_xIVR_CHAN_SHIFT)
@@ -1384,7 +1384,7 @@ siointr(unit)
 	}
 
 	/* ensure an edge for the next interrupt */
-	cd_outb(cy_iobase, CY_CLEAR_INTR, cy_align, 0);
+	cy_outb(cy_iobase, CY_CLEAR_INTR, cy_align, 0);
 
 	schedsofttty();
 
diff --git a/sys/i386/isa/cyreg.h b/sys/i386/isa/cyreg.h
index d98cfd80ece0..baedda4175b2 100644
--- a/sys/i386/isa/cyreg.h
+++ b/sys/i386/isa/cyreg.h
@@ -26,32 +26,50 @@
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  *
- *	$Id: cyreg.h,v 1.6 1998/08/13 13:54:10 bde Exp $
+ *	$Id: cyreg.h,v 1.7 1998/08/13 19:03:22 bde Exp $
  */
 
 /*
  * Definitions for Cyclades Cyclom-Y serial boards.
  */
 
-#define	CY8_SVCACKR		0x100
-#define	CY8_SVCACKT		0x200
-#define	CY8_SVCACKM		0x300
-#define	CY16_RESET		0x0a00
-#define	CY_CLEAR_INTR		0x0c00	/* intr ack address */
+/*
+ * Cyclades register offsets.  These are physical offsets for ISA boards
+ * and physical offsets divided by 2 for PCI boards.
+ */
+#define	CY8_SVCACKR		0x100	/* (r) */
+#define	CY8_SVCACKT		0x200	/* (r) */
+#define	CY8_SVCACKM		0x300	/* (r) */
+#define	CY16_RESET		0x1400	/* (r) */
+#define	CY_CLEAR_INTR		0x1800	/* intr ack address (w) */
 
 #define	CY_MAX_CD1400s		8	/* for Cyclom-32Y */
 
 #define	CY_CLOCK(version)	((version) >= 0x48 ? 60000000 : 25000000)
 #define	CY_RTS_DTR_SWAPPED(version)	((version) >= 0x48)
 
+/*
+ * The `cd' macros are for access to cd1400 registers.  The `cy' macros
+ * are for access to Cyclades registers.  Both sets of macros scale the
+ * register number to get an offset, but the scales are different for
+ * mostly historical reasons.
+ */
 #ifdef CyDebug
-#define	cd_inb(iobase, reg, cy_align)	(++cd_inbs, *((iobase) + ((reg)*2 << (cy_align))))
-#define	cy_inb(iobase, reg)		(++cy_inbs, *((iobase) + (reg)))
-#define	cd_outb(iobase, reg, cy_align, val)	(++cd_outbs, (void)(*((iobase) + ((reg)*2 << (cy_align))) = (val)))
-#define	cy_outb(iobase, reg, val)	(++cy_outbs, (void)(*((iobase) + (reg)) = (val)))
+#define	cd_inb(iobase, reg, cy_align) \
+	(++cd_inbs, *((iobase) + (2 * (reg) << (cy_align))))
+#define	cy_inb(iobase, reg, cy_align) \
+	(++cy_inbs, *((iobase) + ((reg) << (cy_align))))
+#define	cd_outb(iobase, reg, cy_align, val) \
+	(++cd_outbs, (void)(*((iobase) + (2 * (reg) << (cy_align))) = (val)))
+#define	cy_outb(iobase, reg, cy_align, val) \
+	(++cy_outbs, (void)(*((iobase) + ((reg) << (cy_align))) = (val)))
 #else
-#define	cd_inb(iobase, reg, cy_align)	(*((iobase) + ((reg)*2 << (cy_align))))
-#define	cy_inb(iobase, reg)		(*((iobase) + (reg)))
-#define	cd_outb(iobase, reg, cy_align, val)	((void)(*((iobase) + ((reg)*2 << (cy_align))) = (val)))
-#define	cy_outb(iobase, reg, val)	((void)(*((iobase) + (reg)) = (val)))
+#define	cd_inb(iobase, reg, cy_align) \
+	(*((iobase) + (2 * (reg) << (cy_align))))
+#define	cy_inb(iobase, reg, cy_align) \
+	(*((iobase) + ((reg) << (cy_align))))
+#define	cd_outb(iobase, reg, cy_align, val) \
+	((void)(*((iobase) + (2 * (reg) << (cy_align))) = (val)))
+#define	cy_outb(iobase, reg, cy_align, val) \
+	((void)(*((iobase) + ((reg) << (cy_align))) = (val)))
 #endif