triffid/Teacup_Firmware — pull request #20 by phord (2012-03-03 20:05:41+00:00)
Title: Add M82/M83 for run-time e_absolute config

Make E_ABSOLUTE only set a variable in memory. Convert all
E_ABSOLUTE usage to read config.e_absolute instead. Add
interpreter for M82/M83 commands to set/clear e_absolute
flag.

Found on http://groups.google.com/group/ultimaker/browse_thread/thread/d76e47d5a9d3c15a

// M82 - Set E codes absolute (default)
// M83 - Set E codes relative while in Absolute Coordinates (G90)
mode

FIXME -- config.e_absolute does not follow G90; should it?