diff --git a/engines/mortevielle/dialogs.cpp b/engines/mortevielle/dialogs.cpp
index 991bda4bd4e..93b556ea683 100644
--- a/engines/mortevielle/dialogs.cpp
+++ b/engines/mortevielle/dialogs.cpp
@@ -40,6 +40,10 @@ namespace Mortevielle {
 
 static const int nligne = 7;
 
+/**
+ * Alert function - Show
+ * @remarks	Originally called 'do_alert'
+ */
 int Alert::show(const Common::String &msg, int n) {
 	int coldep, esp, i, caseNumb, quoi, ix;
 	Common::String st, chaine;
@@ -182,6 +186,10 @@ int Alert::show(const Common::String &msg, int n) {
 	return do_alert_result;
 }
 
+/**
+ * Alert function - Decode Alert Details
+ * @remarks	Originally called 'decod'
+ */
 void Alert::decodeAlertDetails(Common::String s, int &nbc, int &lineNumb, int &col, Common::String &c, Common::String &cs) {
 	int i, k;
 	bool v;
@@ -244,7 +252,6 @@ void Alert::drawAlertBox(int lidep, int nli, int tx) {
 	g_vm->_screenSurface.fillRect(0, Common::Rect(x, yy - 4, xx, yy - 2));
 }
 
-
 /**
  * Alert function - Set Button Text
  * @remarks	Originally called 'fait_choix'
@@ -425,34 +432,43 @@ void f3f8::draw() {
 	g_vm->_screenSurface.drawBox(0, 42, MAX(f3Width, f8Width) + 6, 16, 7);
 }
 
-void f3f8::divers(int np, bool b) {
+/**
+ * Alert function - Loop until F8 is pressed, update 
+ * Graphical Device if modified
+ * @remarks	Originally called 'diver'
+ */
+void f3f8::checkForF8(int SpeechNum, bool drawAni50Fl) {
 	teskbd();
 	do {
-		parole(np, 0, 0);
-		atf3f8(key);
+		parole(SpeechNum, 0, 0);
+		waitForF3F8(key);
 		CHECK_QUIT;
 
-		if (newgd != gd) {
-			gd = newgd;
+		if (_newGraphicalDevice != _currGraphicalDevice) {
+			_currGraphicalDevice = _newGraphicalDevice;
 			hirs();
-			aff50(b);
+			aff50(drawAni50Fl);
 		}
-	} while (!(key == 66));
+	} while (!(key == 66)); // keycode for F8
 }
 
-void f3f8::atf3f8(int &key) {
+/**
+ * Alert function - Loop until F3 or F8 is pressed
+ * @remarks	Originally called 'atf3f8'
+ */
+void f3f8::waitForF3F8(int &key) {
 	do {
 		key = testou();
 		CHECK_QUIT;
 	} while (!((key == 61) || (key == 66)));
 }
 
-void f3f8::aff50(bool c) {
+void f3f8::aff50(bool drawAni50Fl) {
 	caff = 50;
 	_maff = 0;
 	taffich();
 	dessine(ades, 63, 12);
-	if (c)
+	if (drawAni50Fl)
 		ani50();
 	else
 		repon(2, c_paroles + 142);
diff --git a/engines/mortevielle/dialogs.h b/engines/mortevielle/dialogs.h
index 76b824eab06..a8c0cb7cf7f 100644
--- a/engines/mortevielle/dialogs.h
+++ b/engines/mortevielle/dialogs.h
@@ -50,9 +50,9 @@ public:
 class f3f8 {
 public:
 	static void draw();
-	static void divers(int np, bool b);
-	static void atf3f8(int &key);
-	static void aff50(bool c);
+	static void checkForF8(int SpeechNum, bool drawAni50Fl);
+	static void waitForF3F8(int &key);
+	static void aff50(bool drawAni50Fl);
 	static void ani50();
 };
 	
diff --git a/engines/mortevielle/keyboard.cpp b/engines/mortevielle/keyboard.cpp
index bd7ad2c8aae..679264bff9e 100644
--- a/engines/mortevielle/keyboard.cpp
+++ b/engines/mortevielle/keyboard.cpp
@@ -56,6 +56,8 @@ int testou() {
 		if (keypressed())
 			ch = get_ch();
 		break;
+	default:
+		break;
 	}
 
 	return ord(ch);
diff --git a/engines/mortevielle/level15.cpp b/engines/mortevielle/level15.cpp
index d297529470c..eff71722356 100644
--- a/engines/mortevielle/level15.cpp
+++ b/engines/mortevielle/level15.cpp
@@ -68,7 +68,7 @@ void outbloc(int n, pattern p, t_nhom pal) {
 void writepal(int n) {
 	t_nhom pal;
 
-	switch (gd) {
+	switch (_currGraphicalDevice) {
 	case tan:
 	case ega:
 	case ams:
@@ -96,7 +96,7 @@ void pictout(int seg, int dep, int x, int y) {
 	GfxSurface surface;
 	surface.decode(&mem[seg * 16 + dep]);
 
-	if (gd == her) {
+	if (_currGraphicalDevice == her) {
 		mem[0x7000 * 16 + 2] = 0;
 		mem[0x7000 * 16 + 32] = 15;
 	}
@@ -109,13 +109,13 @@ void pictout(int seg, int dep, int x, int y) {
 
 void sauvecr(int y, int dy) {
 	hideMouse();
-	s_sauv(gd, y, dy);
+	s_sauv(_currGraphicalDevice, y, dy);
 	showMouse();
 }
 
 void charecr(int y, int dy) {
 	hideMouse();
-	s_char(gd, y, dy);
+	s_char(_currGraphicalDevice, y, dy);
 	showMouse();
 }
 
diff --git a/engines/mortevielle/menu.cpp b/engines/mortevielle/menu.cpp
index b585177f199..9f2e83f967d 100644
--- a/engines/mortevielle/menu.cpp
+++ b/engines/mortevielle/menu.cpp
@@ -152,7 +152,7 @@ void Menu::menu_aff() {
 	
 	g_vm->_screenSurface.fillRect(7, Common::Rect(0, 0, 639, 10));
 	col = 28 * res;
-	if (gd == cga)
+	if (_currGraphicalDevice == cga)
 		color = 1;
 	else
 		color = 9;
diff --git a/engines/mortevielle/mor.cpp b/engines/mortevielle/mor.cpp
index a4283407c56..76ba080c221 100644
--- a/engines/mortevielle/mor.cpp
+++ b/engines/mortevielle/mor.cpp
@@ -113,7 +113,7 @@ void dessine(int ad, int x, int y) {
 
 void dessine_rouleau() {
 	writepal(89);
-	if (gd == her) {
+	if (_currGraphicalDevice == her) {
 		mem[0x7000 * 16 + 14] = 15;
 	}
 	hideMouse();
@@ -266,7 +266,7 @@ void clsf10() {
 
 void stop() {
 	hirs();
-	gd = ams;
+	_currGraphicalDevice = ams;
 	hirs();
 	g_vm->quitGame();
 }
@@ -274,7 +274,7 @@ void stop() {
 void paint_rect(int x, int y, int dx, int dy) {
 	int co;
 
-	if (gd == cga)
+	if (_currGraphicalDevice == cga)
 		co = 3;
 	else
 		co = 11;
@@ -634,9 +634,10 @@ void drawClock() {
 	
 	paint_rect(570, 118, 20, 10);
 	paint_rect(578, 114, 6, 18);
-	if ((gd == cga) || (gd == her))
+	if ((_currGraphicalDevice == cga) || (_currGraphicalDevice == her))
 		co = 0;
-	else co = 1;
+	else
+		co = 1;
 
 	if (_minute == 0)
 		g_vm->_screenSurface.drawLine(((uint)x >> 1)*res, y, ((uint)x >> 1)*res, (y - rg), co);
diff --git a/engines/mortevielle/mor2.cpp b/engines/mortevielle/mor2.cpp
index 9dcbb85b0e1..fff69179078 100644
--- a/engines/mortevielle/mor2.cpp
+++ b/engines/mortevielle/mor2.cpp
@@ -200,9 +200,9 @@ void fenat(char ans) {
 	int coul;
 
 	hideMouse();
-	if (gd == cga)
+	if (_currGraphicalDevice == cga)
 		coul = 2;
-	else if (gd == her)
+	else if (_currGraphicalDevice == her)
 		coul = 1;
 	else
 		coul = 12;
@@ -425,7 +425,7 @@ void sparl(float adr, float rep) {
 	key = 0;
 	do {
 		parole(repint, haut[caff - 69], 0);
-		f3f8::atf3f8(key);
+		f3f8::waitForF3F8(key);
 		CHECK_QUIT;
 	} while (!(key == 66));
 	hirs();
diff --git a/engines/mortevielle/mortevielle.cpp b/engines/mortevielle/mortevielle.cpp
index 4112073cde5..e6ecbde4d34 100644
--- a/engines/mortevielle/mortevielle.cpp
+++ b/engines/mortevielle/mortevielle.cpp
@@ -120,7 +120,7 @@ Common::ErrorCode MortevielleEngine::initialise() {
 	_screenSurface.create(SCREEN_WIDTH, SCREEN_HEIGHT, Graphics::PixelFormat::createFormatCLUT8());
 
 	// Set the screen mode
-	gd = ega;
+	_currGraphicalDevice = ega;
 	res = 2;
 
 	// Load the mort.dat resource
@@ -134,8 +134,8 @@ Common::ErrorCode MortevielleEngine::initialise() {
 	// Setup the mouse cursor
 	initMouse();
 
-	gd = ega;
-	newgd = gd;
+	_currGraphicalDevice = ega;
+	_newGraphicalDevice = _currGraphicalDevice;
 	zuul = false;
 	tesok = false;
 	chartex();
@@ -153,10 +153,10 @@ Common::ErrorCode MortevielleEngine::initialise() {
 
 	teskbd();
 	dialpre();
-	newgd = gd;
+	_newGraphicalDevice = _currGraphicalDevice;
 	teskbd();
-	if (newgd != gd)
-		gd = newgd;
+	if (_newGraphicalDevice != _currGraphicalDevice)
+		_currGraphicalDevice = _newGraphicalDevice;
 	hirs();
 	ades = 0x7000;
 
@@ -469,11 +469,11 @@ Common::Error MortevielleEngine::run() {
 void MortevielleEngine::showIntroduction() {
 	f3f8::aff50(false);
 	mlec = 0;
-	f3f8::divers(142, false);
+	f3f8::checkForF8(142, false);
 	CHECK_QUIT;
 
 	f3f8::ani50();
-	f3f8::divers(143, true);
+	f3f8::checkForF8(143, true);
 	CHECK_QUIT;
 
 	// TODO: Once music is implemented, only use the below delay if music is turned off
@@ -558,7 +558,7 @@ void MortevielleEngine::handleAction() {
 		g_vm->_menu.eraseMenu();
 		imen = false;
 		if ((inkey == '\1') || (inkey == '\3') || (inkey == '\5') || (inkey == '\7') || (inkey == '\11')) {
-			change_gd((uint)pred(int, ord(inkey)) >> 1);
+			changeGraphicalDevice((uint)pred(int, ord(inkey)) >> 1);
 			return;
 		}
 		if (choisi && (msg[3] == sauve)) {
diff --git a/engines/mortevielle/mouse.cpp b/engines/mortevielle/mouse.cpp
index 44b254fe416..2a4ab76efbf 100644
--- a/engines/mortevielle/mouse.cpp
+++ b/engines/mortevielle/mouse.cpp
@@ -89,7 +89,7 @@ void hideMouse() {
 	if (mouse_shwn == 0) {
 		imp = odd(y_s);
 		j = p_o_s;
-		switch (gd) {
+		switch (_currGraphicalDevice) {
 		case cga:
 			k = 0;
 			j = ((uint)y_s >> 1) * 80 + ((uint)x_s >> 2);
@@ -180,7 +180,7 @@ void showMouse() {
 	j = p_o_s;
 	imp = odd(y_s);
 	i = x_s & 7;
-	switch (gd) {
+	switch (_currGraphicalDevice) {
 	case cga:
 		k = 0;
 		j = ((uint)y_s >> 1) * 80 + ((uint)x_s >> 2);
diff --git a/engines/mortevielle/ovd1.cpp b/engines/mortevielle/ovd1.cpp
index 0177d3e5c1a..fb893570ffd 100644
--- a/engines/mortevielle/ovd1.cpp
+++ b/engines/mortevielle/ovd1.cpp
@@ -239,8 +239,8 @@ void suite() {
 	caff = 51;
 	taffich();
 	teskbd();
-	if (newgd != gd)
-		gd = newgd;
+	if (_newGraphicalDevice != _currGraphicalDevice)
+		_currGraphicalDevice = _newGraphicalDevice;
 	hirs();
 	dessine(ades, 0, 0);
 
diff --git a/engines/mortevielle/prog.cpp b/engines/mortevielle/prog.cpp
index fa83b822d01..0c05e81cdbc 100644
--- a/engines/mortevielle/prog.cpp
+++ b/engines/mortevielle/prog.cpp
@@ -38,9 +38,13 @@
 
 namespace Mortevielle {
 
-void change_gd(int ngd) {
+/**
+ * Engine function - Change Graphical Device
+ * @remarks	Originally called 'change_gd'
+ */
+void changeGraphicalDevice(int newDevice) {
 	hideMouse();
-	gd = ngd;
+	_currGraphicalDevice = newDevice;
 	hirs();
 	initMouse();
 	showMouse();
diff --git a/engines/mortevielle/prog.h b/engines/mortevielle/prog.h
index e88b9433073..c6ccca89200 100644
--- a/engines/mortevielle/prog.h
+++ b/engines/mortevielle/prog.h
@@ -30,7 +30,7 @@
 
 namespace Mortevielle {
 
-extern void change_gd(int ngd);
+extern void changeGraphicalDevice(int newDevice);
 
 /* NIVEAU 3 */
 /* procedure PROGRAMME */
diff --git a/engines/mortevielle/taffich.cpp b/engines/mortevielle/taffich.cpp
index 4da3ef0c32c..1306f7f1b1d 100644
--- a/engines/mortevielle/taffich.cpp
+++ b/engines/mortevielle/taffich.cpp
@@ -208,7 +208,7 @@ void taffich() {
 		npal = a + 37;
 	}
 	chardes(filename, lgt, handle);
-	if (gd == her) {
+	if (_currGraphicalDevice == her) {
 		for (i = 0; i <= 15; ++i) {
 			palh = READ_LE_UINT16(&mem[0x7000 * 16 + (succ(int, i) << 1)]);
 			alllum[i] = (palh & 15) + (((uint)palh >> 12) & 15) + (((uint)palh >> 8) & 15);
diff --git a/engines/mortevielle/var_mor.cpp b/engines/mortevielle/var_mor.cpp
index efd84cca760..759c29ab9b3 100644
--- a/engines/mortevielle/var_mor.cpp
+++ b/engines/mortevielle/var_mor.cpp
@@ -124,7 +124,7 @@ int x,
         jh,
         mh,
         cs,
-        gd,                /*  Gd = graph device  */
+        _currGraphicalDevice,
         hdb,
         hfb,
         _hour,
@@ -147,7 +147,7 @@ int x,
         msg3,
         msg4,
         mlec,
-        newgd,
+        _newGraphicalDevice,
         c_zzz,
         mchai,
         menup,
diff --git a/engines/mortevielle/var_mor.h b/engines/mortevielle/var_mor.h
index a77586ca2b9..179c92d6bc4 100644
--- a/engines/mortevielle/var_mor.h
+++ b/engines/mortevielle/var_mor.h
@@ -273,7 +273,7 @@ extern int x,
         jh,
         mh,
         cs,
-        gd,                /*  Gd = graph device  */
+        _currGraphicalDevice,
         hdb,
         hfb,
         _hour,
@@ -296,7 +296,7 @@ extern int x,
         msg3,
         msg4,
         mlec,
-        newgd,
+        _newGraphicalDevice,
         c_zzz,
         mchai,
         menup,