diff --git a/dda.c b/dda.c
index bb122b6..db77f67 100644
--- a/dda.c
+++ b/dda.c
@@ -228,15 +228,15 @@ void dda_create(DDA *dda, TARGET *target) {
 	if (target->all_relative) {
 		x_delta_um = labs(target->X);
 		um_to_steps_x(dda->x_delta, x_delta_um);
-		dda->x_direction = (target->X < 0)?1:0;
+		dda->x_direction = (target->X >= 0)?1:0;
 
 		y_delta_um = labs(target->Y);
 		um_to_steps_y(dda->y_delta, y_delta_um);
-		dda->y_direction = (target->Y < 0)?1:0;
+		dda->y_direction = (target->Y >= 0)?1:0;
 
 		z_delta_um = labs(target->Z);
 		um_to_steps_z(dda->z_delta, z_delta_um);
-		dda->z_direction = (target->Z < 0)?1:0;
+		dda->z_direction = (target->Z >= 0)?1:0;
 	}
 	else {
 		x_delta_um = (uint32_t)labs(target->X - startpoint.X);
@@ -262,7 +262,7 @@ void dda_create(DDA *dda, TARGET *target) {
 	if (target->all_relative || target->e_relative) {
 		e_delta_um = labs(target->E);
 		um_to_steps_e(dda->e_delta, e_delta_um);
-		dda->e_direction = (target->E < 0)?1:0;
+		dda->e_direction = (target->E >= 0)?1:0;
 	}
 	else {
 		e_delta_um = (uint32_t)labs(target->E - startpoint.E);
diff --git a/gcode_process.c b/gcode_process.c
index 8941bf7..268b4be 100644
--- a/gcode_process.c
+++ b/gcode_process.c
@@ -73,7 +73,7 @@ void process_gcode_command() {
 	#ifdef	X_MAX
 		if (next_target.target.all_relative) {
 			if (next_target.target.X += startpoint.X > X_MAX * 1000.)
-				next_target.target.X = X_MIN * 1000. - startpoint.X;
+				next_target.target.X = X_MAX * 1000. - startpoint.X;
 		}
 		else {
 			if (next_target.target.X > X_MAX * 1000.)
@@ -93,7 +93,7 @@ void process_gcode_command() {
 	#ifdef	Y_MAX
 		if (next_target.target.all_relative) {
 			if (next_target.target.Y += startpoint.Y > Y_MAX * 1000.)
-				next_target.target.Y = Y_MIN * 1000. - startpoint.Y;
+				next_target.target.Y = Y_MAX * 1000. - startpoint.Y;
 		}
 		else {
 			if (next_target.target.Y > Y_MAX * 1000.)
@@ -113,7 +113,7 @@ void process_gcode_command() {
 	#ifdef	Z_MAX
 		if (next_target.target.all_relative) {
 			if (next_target.target.Z += startpoint.Z > Z_MAX * 1000.)
-				next_target.target.Z = Z_MIN * 1000. - startpoint.Z;
+				next_target.target.Z = Z_MAX * 1000. - startpoint.Z;
 		}
 		else {
 			if (next_target.target.Z > Z_MAX * 1000.)
@@ -424,8 +424,8 @@ void process_gcode_command() {
 			case 82:
 				//? --- M82 - Set E codes absolute ---
 				//?
-				//? This is the default. M82/M82 is not documented in the
-				//? RepRap wiki, behaviours was taken from Strinter as of March 2012.
+				//? This is the default. M82/M83 is not documented in the
+				//? RepRap wiki, behaviours was taken from Sprinter as of March 2012.
 
 				// No wait_queue() needed.
 				next_target.target.e_relative = 0;