diff --git a/bitmap/addagentlink.xbm b/bitmap/addagentlink.xbm
index 24fb84b..e7c2105 100644
--- a/bitmap/addagentlink.xbm
+++ b/bitmap/addagentlink.xbm
@@ -1,6 +1,6 @@
 #define addagentlink_width 21
 #define addagentlink_height 16
-static char addagentlink_bits[] = {
+static unsigned char addagentlink_bits[] = {
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x0f, 0x00, 0x1e, 0xf9, 0xff, 0x13, 0xf9, 0xff, 0x13,
    0x0f, 0x00, 0x1e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
diff --git a/bitmap/addlink.xbm b/bitmap/addlink.xbm
index 10729a6..bee1dff 100644
--- a/bitmap/addlink.xbm
+++ b/bitmap/addlink.xbm
@@ -1,6 +1,6 @@
 #define addlink_width 21
 #define addlink_height 16
-static char addlink_bits[] = {
+static unsigned char addlink_bits[] = {
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x07, 0x00, 0x1c, 0xff, 0xff, 0x1f, 0xff, 0xff, 0x1f,
    0x07, 0x00, 0x1c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
diff --git a/bitmap/addnode.xbm b/bitmap/addnode.xbm
index 535216f..7859e56 100644
--- a/bitmap/addnode.xbm
+++ b/bitmap/addnode.xbm
@@ -1,6 +1,6 @@
 #define addnode_width 21
 #define addnode_height 16
-static char addnode_bits[] = {
+static unsigned char addnode_bits[] = {
    0x00, 0x00, 0x00, 0x00, 0x0e, 0x00, 0x80, 0x31, 0x00, 0x60, 0xc0, 0x00,
    0x20, 0x84, 0x00, 0x10, 0x00, 0x01, 0x10, 0x04, 0x01, 0x08, 0x04, 0x02,
    0x08, 0x04, 0x02, 0x08, 0x04, 0x02, 0x10, 0x04, 0x01, 0x10, 0x04, 0x01,
diff --git a/bitmap/back.xbm b/bitmap/back.xbm
index 9c97acb..0136976 100644
--- a/bitmap/back.xbm
+++ b/bitmap/back.xbm
@@ -1,6 +1,6 @@
 #define back_width 20
 #define back_height 13
-static char back_bits[] = {
+static unsigned char back_bits[] = {
    0x00, 0x00, 0x00, 0x00, 0xc0, 0x00, 0x00, 0xf0, 0x00, 0x00, 0xfc, 0x00,
    0x00, 0xff, 0x00, 0xc0, 0xff, 0x00, 0xf0, 0xff, 0x00, 0xc0, 0xff, 0x00,
    0x00, 0xff, 0x00, 0x00, 0xfc, 0x00, 0x00, 0xf0, 0x00, 0x00, 0xc0, 0x00,
diff --git a/bitmap/cut.xbm b/bitmap/cut.xbm
index c8ebb92..bf3c7d7 100644
--- a/bitmap/cut.xbm
+++ b/bitmap/cut.xbm
@@ -1,6 +1,6 @@
 #define cut_width 21
 #define cut_height 16
-static char cut_bits[] = {
+static unsigned char cut_bits[] = {
    0x08, 0x00, 0x01, 0x08, 0x00, 0x01, 0x08, 0x00, 0x01, 0x10, 0xc0, 0x00,
    0x10, 0xc0, 0x00, 0x60, 0x20, 0x00, 0x60, 0x20, 0x00, 0x80, 0x10, 0x00,
    0x80, 0x10, 0x00, 0x00, 0x09, 0x00, 0x00, 0x09, 0x00, 0x00, 0x06, 0x00,
diff --git a/bitmap/delete.xbm b/bitmap/delete.xbm
index eab2e47..c3aa977 100644
--- a/bitmap/delete.xbm
+++ b/bitmap/delete.xbm
@@ -2,7 +2,7 @@
 #define delete_height 16
 #define delete_x_hot 10
 #define delete_y_hot 8
-static char delete_bits[] = {
+static unsigned char delete_bits[] = {
    0x00, 0x00, 0x00, 0x00, 0x0e, 0x00, 0x80, 0x31, 0x00, 0x60, 0xc0, 0x00,
    0x20, 0xe0, 0x00, 0x10, 0x70, 0x01, 0x10, 0x38, 0x01, 0x08, 0x1c, 0x02,
    0x08, 0x0e, 0x02, 0x08, 0x07, 0x02, 0x90, 0x03, 0x01, 0xd0, 0x01, 0x01,
diff --git a/bitmap/edit.xbm b/bitmap/edit.xbm
index 07e4f7c..73e9096 100644
--- a/bitmap/edit.xbm
+++ b/bitmap/edit.xbm
@@ -2,7 +2,7 @@
 #define edit_height 17
 #define edit_x_hot 0
 #define edit_y_hot 0
-static char edit_bits[] = {
+static unsigned char edit_bits[] = {
    0x07, 0xc0, 0xff, 0xff, 0xff, 0xff, 0x07, 0xe0, 0xff, 0x02, 0x10, 0xfe, 
    0x02, 0x18, 0xfe, 0x02, 0x0c, 0xfe, 0x02, 0x04, 0xfe, 0x82, 0x03, 0xfe, 
    0x82, 0x03, 0xfe, 0x82, 0x03, 0xfe, 0x02, 0x04, 0xfe, 0x02, 0x08, 0xfe, 
diff --git a/bitmap/eject.xbm b/bitmap/eject.xbm
index d1c37e0..c63489a 100644
--- a/bitmap/eject.xbm
+++ b/bitmap/eject.xbm
@@ -1,6 +1,6 @@
 #define eject_width 20
 #define eject_height 13
-static char eject_bits[] = {
+static unsigned char eject_bits[] = {
    0x00, 0x00, 0x00, 0x00, 0x06, 0x00, 0x00, 0x0f, 0x00, 0x80, 0x1f, 0x00,
    0xc0, 0x3f, 0x00, 0xe0, 0x7f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x06, 0x00,
    0x00, 0x0f, 0x00, 0x80, 0x1f, 0x00, 0xc0, 0x3f, 0x00, 0xe0, 0x7f, 0x00,
diff --git a/bitmap/ff.xbm b/bitmap/ff.xbm
index 51614f3..0db9d79 100644
--- a/bitmap/ff.xbm
+++ b/bitmap/ff.xbm
@@ -1,6 +1,6 @@
 #define ff_width 20
 #define ff_height 13
-static char ff_bits[] = {
+static unsigned char ff_bits[] = {
    0x00, 0x00, 0x00, 0x08, 0x08, 0x00, 0x18, 0x18, 0x00, 0x38, 0x38, 0x00,
    0x78, 0x78, 0x00, 0xf8, 0xf8, 0x00, 0xf8, 0xf9, 0x01, 0xf8, 0xf8, 0x00,
    0x78, 0x78, 0x00, 0x38, 0x38, 0x00, 0x18, 0x18, 0x00, 0x08, 0x08, 0x00,
diff --git a/bitmap/mark1.xbm b/bitmap/mark1.xbm
index c049d44..307becd 100644
--- a/bitmap/mark1.xbm
+++ b/bitmap/mark1.xbm
@@ -2,5 +2,5 @@
 #define mark1_height 8
 #define mark1_x_hot 3
 #define mark1_y_hot 3
-static char mark1_bits[] = {
+static unsigned char mark1_bits[] = {
    0x00, 0x00, 0x1c, 0x1c, 0x1c, 0x00, 0x00, 0x00};
diff --git a/bitmap/mark2.xbm b/bitmap/mark2.xbm
index 25137a4..f05e2dd 100644
--- a/bitmap/mark2.xbm
+++ b/bitmap/mark2.xbm
@@ -2,5 +2,5 @@
 #define mark2_height 8
 #define mark2_x_hot 3
 #define mark2_y_hot 3
-static char mark2_bits[] = {
+static unsigned char mark2_bits[] = {
    0x00, 0x3e, 0x22, 0x22, 0x22, 0x3e, 0x00, 0x00};
diff --git a/bitmap/mark3.xbm b/bitmap/mark3.xbm
index d1d9273..616ced1 100644
--- a/bitmap/mark3.xbm
+++ b/bitmap/mark3.xbm
@@ -2,5 +2,5 @@
 #define mark3_height 8
 #define mark3_x_hot 3
 #define mark3_y_hot 3
-static char mark3_bits[] = {
+static unsigned char mark3_bits[] = {
    0x00, 0x1c, 0x36, 0x22, 0x36, 0x1c, 0x00, 0x00};
diff --git a/bitmap/mark4.xbm b/bitmap/mark4.xbm
index 2136936..dfe0b45 100644
--- a/bitmap/mark4.xbm
+++ b/bitmap/mark4.xbm
@@ -2,5 +2,5 @@
 #define mark4_height 8
 #define mark4_x_hot 3
 #define mark4_y_hot 3
-static char mark4_bits[] = {
+static unsigned char mark4_bits[] = {
    0x00, 0x22, 0x14, 0x08, 0x14, 0x22, 0x00, 0x00};
diff --git a/bitmap/mark5.xbm b/bitmap/mark5.xbm
index 1200f07..637dccc 100644
--- a/bitmap/mark5.xbm
+++ b/bitmap/mark5.xbm
@@ -2,5 +2,5 @@
 #define mark5_height 8
 #define mark5_x_hot 3
 #define mark5_y_hot 3
-static char mark5_bits[] = {
+static unsigned char mark5_bits[] = {
    0x00, 0x08, 0x14, 0x22, 0x14, 0x08, 0x00, 0x00};
diff --git a/bitmap/mark6.xbm b/bitmap/mark6.xbm
index 41393ea..e998221 100644
--- a/bitmap/mark6.xbm
+++ b/bitmap/mark6.xbm
@@ -2,5 +2,5 @@
 #define mark6_height 8
 #define mark6_x_hot 3
 #define mark6_y_hot 3
-static char mark6_bits[] = {
+static unsigned char mark6_bits[] = {
    0x00, 0x1c, 0x14, 0x1c, 0x14, 0x1c, 0x00, 0x00};
diff --git a/bitmap/mark7.xbm b/bitmap/mark7.xbm
index 8467824..fbb5151 100644
--- a/bitmap/mark7.xbm
+++ b/bitmap/mark7.xbm
@@ -2,5 +2,5 @@
 #define mark7_height 8
 #define mark7_x_hot 3
 #define mark7_y_hot 3
-static char mark7_bits[] = {
+static unsigned char mark7_bits[] = {
    0x00, 0x1c, 0x2a, 0x36, 0x2a, 0x1c, 0x00, 0x00};
diff --git a/bitmap/mark8.xbm b/bitmap/mark8.xbm
index c1b98f9..1901f43 100644
--- a/bitmap/mark8.xbm
+++ b/bitmap/mark8.xbm
@@ -2,5 +2,5 @@
 #define mark8_height 8
 #define mark8_x_hot 3
 #define mark8_y_hot 3
-static char mark8_bits[] = {
+static unsigned char mark8_bits[] = {
    0x00, 0x3e, 0x1c, 0x08, 0x1c, 0x3e, 0x00, 0x00};
diff --git a/bitmap/monitors.xbm b/bitmap/monitors.xbm
index 3f709b4..7edbf22 100644
--- a/bitmap/monitors.xbm
+++ b/bitmap/monitors.xbm
@@ -1,6 +1,6 @@
 #define monitors_width 16
 #define monitors_height 75
-static char monitors_bits[] = {
+static unsigned char monitors_bits[] = {
  0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
  0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x40,0x06,
  0x60,0x0f,0x60,0x0f,0xe0,0x0d,0xe0,0x0d,0xc0,0x04,0x60,0x00,0x60,0x00,0xe0,
diff --git a/bitmap/netedit.xbm b/bitmap/netedit.xbm
index 8cee910..2affb31 100644
--- a/bitmap/netedit.xbm
+++ b/bitmap/netedit.xbm
@@ -2,7 +2,7 @@
 #define netedit_height 25
 #define netedit_x_hot 0
 #define netedit_y_hot 0
-static char netedit_bits[] = {
+static unsigned char netedit_bits[] = {
    0x00, 0x00, 0xfe, 0x00, 0x00, 0xfe, 0x00, 0x00, 0xfe, 0x00, 0x00, 0xfe, 
    0x78, 0x3c, 0xfe, 0x08, 0x44, 0xfe, 0x38, 0x44, 0xfe, 0x08, 0x44, 0xfe, 
    0x08, 0x44, 0xfe, 0x78, 0x3c, 0xfe, 0x00, 0x00, 0xfe, 0x00, 0x00, 0xfe, 
diff --git a/bitmap/netview.xbm b/bitmap/netview.xbm
index d24ec5e..2e35621 100644
--- a/bitmap/netview.xbm
+++ b/bitmap/netview.xbm
@@ -2,7 +2,7 @@
 #define netview_height 25
 #define netview_x_hot 0
 #define netview_y_hot 0
-static char netview_bits[] = {
+static unsigned char netview_bits[] = {
    0x00, 0x00, 0xf8, 0x00, 0x00, 0xf8, 0x00, 0x00, 0xf8, 0x00, 0x00, 0xf8, 
    0x48, 0x10, 0xf8, 0x48, 0x10, 0xf8, 0x48, 0x10, 0xf8, 0x48, 0x10, 0xf8, 
    0x28, 0x10, 0xf8, 0x10, 0x10, 0xf8, 0x00, 0x00, 0xf8, 0x00, 0x00, 0xf8, 
diff --git a/bitmap/nodedown.xbm b/bitmap/nodedown.xbm
index 0595e53..08fd681 100644
--- a/bitmap/nodedown.xbm
+++ b/bitmap/nodedown.xbm
@@ -2,7 +2,7 @@
 #define nodedown_height 16
 #define nodedown_x_hot 0
 #define nodedown_y_hot 0
-static char nodedown_bits[] = {
+static unsigned char nodedown_bits[] = {
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xc0, 0x01, 0x20, 0x02, 
    0x10, 0x04, 0x10, 0x04, 0x10, 0x04, 0x20, 0x02, 0xc0, 0x01, 0x00, 0x00, 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
diff --git a/bitmap/nodeup.xbm b/bitmap/nodeup.xbm
index 3965d81..6b0caac 100644
--- a/bitmap/nodeup.xbm
+++ b/bitmap/nodeup.xbm
@@ -2,7 +2,7 @@
 #define nodeup_height 16
 #define nodeup_x_hot 0
 #define nodeup_y_hot 0
-static char nodeup_bits[] = {
+static unsigned char nodeup_bits[] = {
    0x00, 0x00, 0xe0, 0x01, 0x18, 0x06, 0x04, 0x08, 0x04, 0x08, 0x02, 0x10, 
    0x02, 0x10, 0x02, 0x10, 0x02, 0x10, 0x04, 0x08, 0x04, 0x08, 0x18, 0x06, 
    0xe0, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
diff --git a/bitmap/play.xbm b/bitmap/play.xbm
index ea93a8a..de1628e 100644
--- a/bitmap/play.xbm
+++ b/bitmap/play.xbm
@@ -1,6 +1,6 @@
 #define play_width 20
 #define play_height 13
-static char play_bits[] = {
+static unsigned char play_bits[] = {
    0x00, 0x00, 0x00, 0x30, 0x00, 0x00, 0xf0, 0x00, 0x00, 0xf0, 0x03, 0x00,
    0xf0, 0x0f, 0x00, 0xf0, 0x3f, 0x00, 0xf0, 0xff, 0x00, 0xf0, 0x3f, 0x00,
    0xf0, 0x0f, 0x00, 0xf0, 0x03, 0x00, 0xf0, 0x00, 0x00, 0x30, 0x00, 0x00,
diff --git a/bitmap/pullright.xbm b/bitmap/pullright.xbm
index cc61fd8..b8e26ad 100644
--- a/bitmap/pullright.xbm
+++ b/bitmap/pullright.xbm
@@ -1,6 +1,6 @@
 #define pullright_width 14
 #define pullright_height 28
-static char pullright_bits[] = {
+static unsigned char pullright_bits[] = {
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x04, 0x00, 0x0c, 0x00, 0x1c, 0x00,
    0x3c, 0x00, 0x7c, 0x00, 0xec, 0x00, 0xcc, 0x01, 0x8c, 0x03, 0x0c, 0x07,
    0x0c, 0x0e, 0x0c, 0x1c, 0x0c, 0x0e, 0x0c, 0x07, 0x8c, 0x03, 0xcc, 0x01,
diff --git a/bitmap/rew.xbm b/bitmap/rew.xbm
index ddc07ad..f619e60 100644
--- a/bitmap/rew.xbm
+++ b/bitmap/rew.xbm
@@ -1,6 +1,6 @@
 #define rew_width 20
 #define rew_height 13
-static char rew_bits[] = {
+static unsigned char rew_bits[] = {
    0x00, 0x00, 0x00, 0x00, 0x01, 0x01, 0x80, 0x81, 0x01, 0xc0, 0xc1, 0x01,
    0xe0, 0xe1, 0x01, 0xf0, 0xf1, 0x01, 0xf8, 0xf9, 0x01, 0xf0, 0xf1, 0x01,
    0xe0, 0xe1, 0x01, 0xc0, 0xc1, 0x01, 0x80, 0x81, 0x01, 0x00, 0x01, 0x01,
diff --git a/bitmap/rewind.xbm b/bitmap/rewind.xbm
index 929e7a0..d466abf 100644
--- a/bitmap/rewind.xbm
+++ b/bitmap/rewind.xbm
@@ -1,5 +1,5 @@
 #define rewind_width 15
 #define rewind_height 12
-static char rewind_bits[] = {
+static unsigned char rewind_bits[] = {
    0x00, 0x00, 0x40, 0x10, 0x60, 0x18, 0x70, 0x1c, 0x78, 0x1e, 0x7c, 0x1f,
    0x7c, 0x1f, 0x78, 0x1e, 0x70, 0x1c, 0x60, 0x18, 0x40, 0x10, 0x00, 0x00};
diff --git a/bitmap/select.xbm b/bitmap/select.xbm
index 54b79c0..99d7057 100644
--- a/bitmap/select.xbm
+++ b/bitmap/select.xbm
@@ -1,6 +1,6 @@
 #define select_width 21
 #define select_height 16
-static char select_bits[] = {
+static unsigned char select_bits[] = {
    0x03, 0x00, 0x00, 0x0f, 0x00, 0x00, 0x7e, 0x00, 0x00, 0xfc, 0x01, 0x00,
    0xfc, 0x0f, 0x00, 0xf8, 0x3f, 0x00, 0xf8, 0x1f, 0x00, 0xf0, 0x0f, 0x00,
    0xe0, 0x0f, 0x00, 0xe0, 0x13, 0x00, 0xc0, 0x20, 0x00, 0x40, 0xc0, 0x00,
diff --git a/bitmap/stop.xbm b/bitmap/stop.xbm
index 363dc20..530d836 100644
--- a/bitmap/stop.xbm
+++ b/bitmap/stop.xbm
@@ -1,6 +1,6 @@
 #define stop_width 20
 #define stop_height 13
-static char stop_bits[] = {
+static unsigned char stop_bits[] = {
    0x00, 0x00, 0x00, 0xe0, 0x7f, 0x00, 0xe0, 0x7f, 0x00, 0xe0, 0x7f, 0x00,
    0xe0, 0x7f, 0x00, 0xe0, 0x7f, 0x00, 0xe0, 0x7f, 0x00, 0xe0, 0x7f, 0x00,
    0xe0, 0x7f, 0x00, 0xe0, 0x7f, 0x00, 0xe0, 0x7f, 0x00, 0xe0, 0x7f, 0x00,
diff --git a/bitmap/time.xbm b/bitmap/time.xbm
index 89b7b16..f6ccaf7 100644
--- a/bitmap/time.xbm
+++ b/bitmap/time.xbm
@@ -1,6 +1,6 @@
 #define time_width 30
 #define time_height 10
-static char time_bits[] = {
+static unsigned char time_bits[] = {
    0xff, 0x5f, 0xff, 0x3f, 0x01, 0x40, 0x00, 0x20, 0x7d, 0x47, 0x44, 0x2f,
    0x11, 0xe2, 0x6c, 0x21, 0x11, 0xe2, 0x54, 0x23, 0x11, 0xe2, 0x44, 0x21,
    0x11, 0xe2, 0x44, 0x21, 0x11, 0xf7, 0x45, 0x2f, 0x01, 0xf0, 0x01, 0x20,
diff --git a/bitmap/updir.xbm b/bitmap/updir.xbm
index ac31d30..89637d0 100644
--- a/bitmap/updir.xbm
+++ b/bitmap/updir.xbm
@@ -1,6 +1,6 @@
 #define updir_width 28
 #define updir_height 16 
-static char updir_bits[] = {
+static unsigned char updir_bits[] = {
    0x00, 0x00, 0x00, 0x00, 0x80, 0x1f, 0x00, 0x00, 0x40, 0x20, 0x00, 0x00,
    0x20, 0x40, 0x00, 0x00, 0xf0, 0xff, 0xff, 0x01, 0x10, 0x00, 0x00, 0x01,
    0x10, 0x02, 0x00, 0x01, 0x10, 0x07, 0x00, 0x01, 0x90, 0x0f, 0x00, 0x01,
diff --git a/bitmap/zoomin.xbm b/bitmap/zoomin.xbm
index d257938..2a6366b 100644
--- a/bitmap/zoomin.xbm
+++ b/bitmap/zoomin.xbm
@@ -1,6 +1,6 @@
 #define zoomin_width 21
 #define zoomin_height 16
-static char zoomin_bits[] = {
+static unsigned char zoomin_bits[] = {
    0x00, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x1b, 0x00, 0xc0, 0x60, 0x00,
    0x30, 0x80, 0x01, 0x0c, 0x00, 0x06, 0xff, 0xe0, 0x1f, 0x41, 0x40, 0x10,
    0x21, 0x80, 0x10, 0x3f, 0x80, 0x1f, 0xf0, 0xff, 0x01, 0x10, 0x00, 0x01,
diff --git a/bitmap/zoomout.xbm b/bitmap/zoomout.xbm
index 635ba36..00f5f52 100644
--- a/bitmap/zoomout.xbm
+++ b/bitmap/zoomout.xbm
@@ -1,6 +1,6 @@
 #define zoomout_width 21
 #define zoomout_height 16
-static char zoomout_bits[] = {
+static unsigned char zoomout_bits[] = {
    0x00, 0x00, 0x00, 0xf0, 0xff, 0x01, 0x30, 0x80, 0x01, 0x50, 0x40, 0x01,
    0xa0, 0xa0, 0x00, 0xff, 0xe0, 0x1f, 0x07, 0x00, 0x1c, 0x19, 0x00, 0x13,
    0x61, 0xc0, 0x10, 0x81, 0x31, 0x10, 0x06, 0x0e, 0x0c, 0x18, 0x04, 0x03,