Runs Debian Sarge with 48MB of memory, after anvram modification nvram to make it behave like a Classic.
pvz@hobbes:~$ cat /proc/cpuinfo cpu : Texas Instruments, Inc. - MicroSparc fpu : TI MicroSparc on chip FPU promlib : Version 3 Revision 2 prom : 2.12 type : sun4m CPU0Bogo : 49.76 MMU type : TI Tsunami
Linux hobbes 2.6.12-1-sparc32 #1 Mon Jul 11 21:21:17 EDT 2005 sparc GNU/Linux
Kernel downloaded from http://www.wooyd.org/debian/kernels/2.6/
See http://wiki.debian.net/index.cgi?PortsSparc for more information