G21 G90 G17
(Source basis: LinuxCNC src/emc/rs274ngc/rs274ngc_pre.cc init reads [TRAJ] SPINDLES from INI_FILE_NAME.)
(Source basis: LinuxCNC src/emc/rs274ngc/interp_execute.cc passes S-word $ through convert_speed.)
(Source basis: LinuxCNC src/emc/rs274ngc/interp_convert.cc M3/M4/M5 with $ selects a specific spindle.)
S1200 $1
M3 $1
M4 $1
M5 $1
M30