diff --git a/font8x8_basic.h b/font8x8_basic.h
index 125cf16..793076a 100644
--- a/font8x8_basic.h
+++ b/font8x8_basic.h
@@ -18,9 +18,11 @@
  * Fetched from: http://dimensionalrift.homelinux.net/combuster/mos3/?p=viewsource&file=/modules/gfx/font8_8.asm
  **/
 
+ #include <stdint.h>
+
 // Constant: font8x8_basic
 // Contains an 8x8 font map for unicode points U+0000 - U+007F (basic latin)
-char font8x8_basic[128][8] = {
+uint8_t font8x8_basic[128][8] = {
     { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+0000 (nul)
     { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+0001
     { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+0002
diff --git a/font8x8_block.h b/font8x8_block.h
index 4e5d861..ba3cd74 100644
--- a/font8x8_block.h
+++ b/font8x8_block.h
@@ -18,9 +18,11 @@
  * Fetched from: http://dimensionalrift.homelinux.net/combuster/mos3/?p=viewsource&file=/modules/gfx/font8_8.asm
  **/
 
+ #include <stdint.h>
+
 // Constant: font8x8_2580
 // Contains an 8x8 font map for unicode points U+2580 - U+259F (block elements)
-char font8x8_block[32][8] = {
+uint8_t font8x8_block[32][8] = {
     { 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00},   // U+2580 (top half)
     { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xFF},   // U+2581 (box 1/8)
     { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF},   // U+2582 (box 2/8)
diff --git a/font8x8_box.h b/font8x8_box.h
index c3d3b57..633e72d 100644
--- a/font8x8_box.h
+++ b/font8x8_box.h
@@ -18,9 +18,11 @@
  * Fetched from: http://dimensionalrift.homelinux.net/combuster/mos3/?p=viewsource&file=/modules/gfx/font8_8.asm
  **/
 
+ #include <stdint.h>
+
 // Constant: font8x8_2500
 // Contains an 8x8 font map for unicode points U+2500 - U+257F (box drawing)
-char font8x8_box[128][8] = {
+uint8_t font8x8_box[128][8] = {
     { 0x00, 0x00, 0x00, 0x00, 0xFF, 0x00, 0x00, 0x00},   // U+2500 (thin horizontal)
     { 0x00, 0x00, 0x00, 0xFF, 0xFF, 0x00, 0x00, 0x00},   // U+2501 (thick horizontal)
     { 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08},   // U+2502 (thin vertical)
diff --git a/font8x8_control.h b/font8x8_control.h
index 179e654..04de0be 100644
--- a/font8x8_control.h
+++ b/font8x8_control.h
@@ -18,9 +18,11 @@
  * Fetched from: http://dimensionalrift.homelinux.net/combuster/mos3/?p=viewsource&file=/modules/gfx/font8_8.asm
  **/
 
+ #include <stdint.h>
+
 // Constant: font8x8_0080
 // Contains an 8x8 font map for unicode points U+0080 - U+009F (C1/C2 control)
-char font8x8_control[32][8] = {
+uint8_t font8x8_control[32][8] = {
     { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+0080
     { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+0081
     { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+0082
diff --git a/font8x8_ext_latin.h b/font8x8_ext_latin.h
index 75896a5..cf74fa2 100644
--- a/font8x8_ext_latin.h
+++ b/font8x8_ext_latin.h
@@ -18,9 +18,11 @@
  * Fetched from: http://dimensionalrift.homelinux.net/combuster/mos3/?p=viewsource&file=/modules/gfx/font8_8.asm
  **/
 
+ #include <stdint.h>
+
 // Constant: font8x8_00A0
 // Contains an 8x8 font map for unicode points U+00A0 - U+00FF (extended latin)
-char font8x8_ext_latin[96][8] = {
+uint8_t font8x8_ext_latin[96][8] = {
     { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+00A0 (no break space)
     { 0x18, 0x18, 0x00, 0x18, 0x18, 0x18, 0x18, 0x00},   // U+00A1 (inverted !)
     { 0x18, 0x18, 0x7E, 0x03, 0x03, 0x7E, 0x18, 0x18},   // U+00A2 (dollarcents)
diff --git a/font8x8_greek.h b/font8x8_greek.h
index ea3a610..03bb5bb 100644
--- a/font8x8_greek.h
+++ b/font8x8_greek.h
@@ -18,9 +18,11 @@
  * Fetched from: http://dimensionalrift.homelinux.net/combuster/mos3/?p=viewsource&file=/modules/gfx/font8_8.asm
  **/
 
+ #include <stdint.h>
+
 // Constant: font8x8_0390
 // Contains an 8x8 font map for unicode points U+0390 - U+03C9 (greek characters)
-char font8x8_greek[58][8] = {
+uint8_t font8x8_greek[58][8] = {
     { 0x2D, 0x00, 0x0C, 0x0C, 0x0C, 0x2C, 0x18, 0x00},   // U+0390 (iota with tonos and diaeresis)
     { 0x0C, 0x1E, 0x33, 0x33, 0x3F, 0x33, 0x33, 0x00},   // U+0391 (Alpha)
     { 0x3F, 0x66, 0x66, 0x3E, 0x66, 0x66, 0x3F, 0x00},   // U+0392 (Beta)
diff --git a/font8x8_hiragana.h b/font8x8_hiragana.h
index add4223..d0679fe 100644
--- a/font8x8_hiragana.h
+++ b/font8x8_hiragana.h
@@ -18,9 +18,11 @@
  * Fetched from: http://dimensionalrift.homelinux.net/combuster/mos3/?p=viewsource&file=/modules/gfx/font8_8.asm
  **/
 
+ #include <stdint.h>
+
 // Contains an 8x8 font map for unicode points U+3040 - U+309F (Hiragana)
 // Constant: font8x8_3040
-char font8x8_hiragana[96][8] = {
+uint8_t font8x8_hiragana[96][8] = {
     { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+3040
     { 0x04, 0x3F, 0x04, 0x3C, 0x56, 0x4D, 0x26, 0x00},   // U+3041 (Hiragana a)
     { 0x04, 0x3F, 0x04, 0x3C, 0x56, 0x4D, 0x26, 0x00},   // U+3042 (Hiragana A)
diff --git a/font8x8_misc.h b/font8x8_misc.h
index 5758224..8a8f09f 100644
--- a/font8x8_misc.h
+++ b/font8x8_misc.h
@@ -18,8 +18,10 @@
  * Fetched from: http://dimensionalrift.homelinux.net/combuster/mos3/?p=viewsource&file=/modules/gfx/font8_8.asm
  **/
 
+ #include <stdint.h>
+
 // for later use
-char font8x8_misc[10][8] = {
+uint8_t font8x8_misc[10][8] = {
     { 0x1F, 0x33, 0x33, 0x5F, 0x63, 0xF3, 0x63, 0xE3},   // U+20A7 (Spanish Pesetas/Pt)
     { 0x70, 0xD8, 0x18, 0x3C, 0x18, 0x18, 0x1B, 0x0E},   // U+0192 (dutch florijn)
     { 0x3C, 0x36, 0x36, 0x7C, 0x00, 0x7E, 0x00, 0x00},   // U+ (underlined superscript a)
diff --git a/font8x8_sga.h b/font8x8_sga.h
index 13457da..953f362 100644
--- a/font8x8_sga.h
+++ b/font8x8_sga.h
@@ -18,7 +18,9 @@
  * Fetched from: http://dimensionalrift.homelinux.net/combuster/mos3/?p=viewsource&file=/modules/gfx/font8_8.asm
  **/
 
-char font8x8_sga[26][8] = {
+ #include <stdint.h>
+
+uint8_t font8x8_sga[26][8] = {
     { 0x00, 0x00, 0x38, 0x66, 0x06, 0x06, 0x07, 0x00},   // U+E541 (SGA A)
     { 0x00, 0x00, 0x0C, 0x0C, 0x18, 0x30, 0x7F, 0x00},   // U+E542 (SGA B)
     { 0x00, 0x00, 0x0C, 0x00, 0x0C, 0x30, 0x30, 0x00},   // U+E543 (SGA C)