--- wikisrc/ports/evbarm.mdwn	2017/10/10 10:43:51	1.41
+++ wikisrc/ports/evbarm.mdwn	2017/10/21 22:39:47	1.42
@@ -22,6 +22,17 @@ designs.
 
 Matt Thomas is the maintainer of NetBSD/evbarm.
 
+### CPU types
+
+The evbarm port can be built with a variety of CPU options.  There are
+three main variables: the instruction set, the endianness, and whether
+there is hardware flaoting point.  By default the CPU type is "earm".
+
+Typically, various boards are best compiled with a CPU type that
+matches the board's CPU and floating point support, but generally a
+lower CPU instruction set version is workable on a newer board.  See
+build.sh and look for aliases for the evbarm port.
+
 ### Board specific information
  - [[Allwinner sunxi family SoCs|Allwinner]]
  - [[BeagleBone and BeagleBone Black|BeagleBone]]