ref: 00d06ac617f27e7e63f70612698a7ff5dc7a9a1a
dir: /sys/src/boot/reform/boot.txt/
mw.b 0x40010000 0x0 0x10000
load ${devtype} ${devnum}:${bootpart} 0x40010000 ${prefix}plan9.ini
load ${devtype} ${devnum}:${bootpart} 0x40100000 ${prefix}9reform.u
bootm 0x40100000