diff --git a/share/man/man4/options.4 b/share/man/man4/options.4
index a6691761dc63..8787ab153884 100644
--- a/share/man/man4/options.4
+++ b/share/man/man4/options.4
@@ -1,4 +1,4 @@
-.\"	$NetBSD: options.4,v 1.115 2000/08/03 00:34:08 jeffs Exp $
+.\"	$NetBSD: options.4,v 1.116 2000/08/30 19:05:47 jhawk Exp $
 .\"
 .\" Copyright (c) 1996
 .\" 	Perry E. Metzger.  All rights reserved.
@@ -30,7 +30,7 @@
 .\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 .\"
 .\"
-.Dd April 13, 2000
+.Dd August 29, 2000
 .Os
 .Dt OPTIONS 4
 .Sh NAME
@@ -1490,6 +1490,18 @@ Ideally the probed defaults are satisfactory, however in practice
 that is not always the case. See
 .Xr pcmcia 4
 for details.
+.It Cd options PCIC_ISA_INTR_ALLOC_MASK=mask
+Controls the allowable interrupts that may be used for
+.Tn PCMCIA
+devices. This mask is a logical-or of power-of-2s of allowable
+interrupts:
+.Bd -literal -offset 04n
+.Em "IRQ Val      IRQ Val      IRQ Val       IRQ Val"
+ 0  0x0001    4  0x0010    8  0x0100    12  0x1000
+ 1  0x0002    5  0x0020    9  0x0200    13  0x2000
+ 2  0x0004    6  0x0040   10  0x0400    14  0x4000
+ 3  0x0008    7  0x0080   11  0x0800    15  0x8000
+.Ed
 .El
 .Ss m68k-specific Options
 .Bl -ohang
diff --git a/share/man/man4/pcmcia.4 b/share/man/man4/pcmcia.4
index 027f65d46380..8ff41c57b03d 100644
--- a/share/man/man4/pcmcia.4
+++ b/share/man/man4/pcmcia.4
@@ -1,4 +1,4 @@
-.\" $NetBSD: pcmcia.4,v 1.17 2000/07/24 11:58:31 ad Exp $
+.\" $NetBSD: pcmcia.4,v 1.18 2000/08/30 19:05:47 jhawk Exp $
 .\"
 .\" Copyright (c) 1999 The NetBSD Foundation, Inc.
 .\" All rights reserved.
@@ -34,7 +34,7 @@
 .\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 .\" POSSIBILITY OF SUCH DAMAGE.
 .\"
-.Dd April 13, 2000
+.Dd August 29, 2000
 .Dt PCMCIA 4
 .Os
 .Sh NAME
@@ -145,12 +145,17 @@ driver appeared in
 .Sh BUGS
 .Ss IO space conflicts
 .Nx 
-probes the pcmcia IO bus width and uses that information to decide
-where to map PCMCIA IO space. For 10-bit wide cards, 0x300-0x3ff is
+probes the
+.Tn PCMCIA
+IO bus width and uses that information to decide
+where to map
+.Tn PCMCIA
+IO space. For 10-bit wide cards, 0x300-0x3ff is
 used. For 12-bit wide cards, 0x400-0x4ff is used.
 .Pp
 Neither choice is perfect. In the 12-bit case, 0x400 appears to work
-on substantially more devices than 0x300. In the event that pcmcia
+on substantially more devices than 0x300. In the event that
+.Tn PCMCIA
 devices are mapped in 0x400-0xfff and appear to be nonfunctional,
 remapping to 0x300-0x3ff may be appropriate; consult
 .Cd options PCIC_ISA_ALLOC_IOBASE
@@ -165,3 +170,12 @@ Example:
 options PCIC_ISA_ALLOC_IOBASE=0x300
 options PCIC_ISA_ALLOC_IOSIZE=0x0ff
 .Ed
+.Ss Interrupt conflicts
+.Nx
+attempts to probe for available interrupts to assign to
+.Tn PCMCIA
+devices. In some cases, it is not possible to detect
+all interrupts in use; in such cases, use of
+.Cd options PCIC_ISA_INTR_ALLOC_MASK
+may be necessary. See
+.Xr options 4 .
\ No newline at end of file