diff --git a/sys/man/8/plan9.ini b/sys/man/8/plan9.ini
index fcedc8558..042ceff29 100644
--- a/sys/man/8/plan9.ini
+++ b/sys/man/8/plan9.ini
@@ -632,16 +632,18 @@ These specify the IP address of the file and authentication server
 to use when mounting a network-provided root file system.
 They are used only if the addresses cannot be determined via DHCP.
 .SS PROCESSOR
-.SS \fLe820=\fIstart end ...\fP
+.SS \fL*e820=\fItype \fB0x\fIstart \fB0x\fIend ...\fP
 This variable is automatically generated by the boot loader (see
 .IR 9boot (8))
 by doing a BIOS E820 memory scan while still in realmode and
 passed to the kernel. The format is a unordered list of 
-hexadecimal 64-bit
+decimal region
+.I type
+and hexadecimal 64-bit
 .I start
 and
 .I end
-addresses of the usable memory areas.
+addresses of the area.
 .SS \fL*maxmem=\fIvalue\fP
 This defines the maximum physical address that the system will scan when sizing memory.
 By default the PC operating system will scan up to 3.75 gigabytes
@@ -689,6 +691,8 @@ Setting
 restricts the kernel to starting at most
 .I value
 processors.
+.SS \fL*apicdebug=\fP
+Prints a summary of the multiprocessor APIC interrupt configuration.
 .SS \fL*msi=\fP
 Enables message signaled interrupts on devices that support it (see
 .IR icanhasmsi (8)).
@@ -710,6 +714,8 @@ on a PCI bus (default 31).
 .SS \fL*nopcirouting=\fP
 Disable pci routing during boot.  May solve interrupt routing
 problems on certain machines.
+.SS \fL*pcihinv=\fP
+Prints a summary of the detected PCI busses and devices.
 .SS \fL*nodumpstack=\fP
 Disable printing a stack dump on panic.
 Useful if there is only a limited cga screen available,
@@ -730,6 +736,17 @@ For example:
 .EX
     umbexclude=0xD1800-0xD3FFF
 .EE
+.SS \fL*acpi=\fIvalue\fP
+The presence of this option enables ACPI and the export of the
+.B #P/acpitbls
+file in
+.IR arch (3)
+device. In multiprocessor mode, the kernel will use the ACPI
+tables to configure APIC interrupts unless a
+.I value
+of
+.B 0
+is specified.
 .SS \fLapm0=\fP
 This enables the ``advanced power management'' interface
 as described in