From mboxrd@z Thu Jan  1 00:00:00 1970
Date: Fri,  9 Aug 1996 22:44:49 -0400
From: Geoff Collyer geoff@research.att.com
Subject: sparc 20
Topicbox-Message-UUID: 4acdfdb4-eac8-11e9-9e20-41e7f4b1d025
Message-ID: <19960810024449.bFIpqzm8uQdGgpNy80jfDEq7QoktVlG7mdhSoem3W3U@z>

Whatever was in sunmmu.h doesn't seem to have been critical.
I was able to build a 9ss10 from the CD by doing

	cd /sys/src/9/ss10
	>sunmmu.h
	mk

I haven't run the resulting 9ss10, however.