diff --git a/include/conio.c b/include/conio.c
index a99ad3d..805e0bf 100644
--- a/include/conio.c
+++ b/include/conio.c
@@ -323,10 +323,7 @@ void putch(char c)
 
 void clrscr(void)
 {
-	__asm
-	{
-		jsr	bsinit
-	}
+	putrch(147);
 }
 
 void textcursor(bool show)
@@ -350,6 +347,24 @@ void textcolor(char c)
 	*(volatile char *)0x0286 = c;
 }
 
+void bgcolor(char c)
+{
+	*(volatile char *)0xd021 = c;
+}
+
+void bordercolor(char c)
+{
+	*(volatile char *)0xd020 = c;
+}
+
+void revers(char r)
+{
+	if (r) 
+		putrch(18);
+	else
+		putrch(18 + 128);
+}
+
 char wherex(void)
 {
 #if defined(__C128__) || defined(__C128B__) || defined(__C128E__)
diff --git a/include/conio.h b/include/conio.h
index a401398..60ed66f 100644
--- a/include/conio.h
+++ b/include/conio.h
@@ -43,6 +43,26 @@ void dispmode80col(void);
 #define PETSCII_F7				0x88
 #define PETSCII_F8				0x8c
 
+enum ConioColors
+{
+	COLOR_BLACK,
+	COLOR_WHITE,
+	COLOR_RED,
+	COLOR_CYAN,
+	COLOR_PURPLE,
+	COLOR_GREEN,
+	COLOR_BLUE,
+	COLOR_YELLOW,
+
+	COLOR_ORANGE,
+	COLOR_BROWN,
+	COLOR_LT_RED,
+	COLOR_DARK_GREY,
+	COLOR_MED_GREY,
+	COLOR_LT_GREEN,
+	COLOR_LT_BLUE,
+	COLOR_LT_GREY
+};
 // Lowlevel console in/out
 
 // using petscii translation
@@ -74,6 +94,12 @@ void gotoxy(char x, char y);
 
 inline void textcolor(char c);
 
+inline void bgcolor(char c);
+
+inline void bordercolor(char c);
+
+inline void revers(char r);
+
 inline char wherex(void);
 
 inline char wherey(void);
diff --git a/include/stdio.c b/include/stdio.c
index 634e939..3bdf8ed 100644
--- a/include/stdio.c
+++ b/include/stdio.c
@@ -417,7 +417,7 @@ char * sformat(char * buff, const char * fmt, int * fps, bool print)
 				si.precision = i;		
 			}
 
-			if (c == 'd' || c == p'd')
+			if (c == 'd' || c == p'd' || c == 'i' || c == p'i')
 			{
 				bi = nformi(&si, bp, *fps++, true);
 			}
diff --git a/include/string.c b/include/string.c
index c711a98..6a4a5a5 100644
--- a/include/string.c
+++ b/include/string.c
@@ -138,6 +138,20 @@ char * cpycat(char * dst, const char * src)
 
 #pragma native(cpycat)
 
+char* strchr( const char* str, int ch )
+{
+	char * p = (char *)str;
+
+	while (*p != (char)ch)
+	{
+		if (!*p)
+			return nullptr;
+		p++;
+	}
+	return p;
+}
+
+
 void * memset(void * dst, int value, int size)
 {
 	__asm
diff --git a/include/string.h b/include/string.h
index 29ac884..c28bfb0 100644
--- a/include/string.h
+++ b/include/string.h
@@ -21,6 +21,8 @@ int memcmp(const void * ptr1, const void * ptr2, int size);
 
 void * memmove(void * dst, const void * src, int size);
 
+char* strchr( const char* str, int ch );
+
 #pragma intrinsic(strcpy)
 
 #pragma intrinsic(memcpy)