diff --git a/programs/develop/ktcc/trunk/libc/include/stdio.h b/programs/develop/ktcc/trunk/libc/include/stdio.h
index 0db71099c4..046de2a68b 100644
--- a/programs/develop/ktcc/trunk/libc/include/stdio.h
+++ b/programs/develop/ktcc/trunk/libc/include/stdio.h
@@ -90,6 +90,13 @@ int vprintf ( const char * format, va_list arg );
 int vsprintf (char * s, const char * format, va_list arg );
 int vfprintf ( FILE * stream, const char * format, va_list arg );
 
+
+int tiny_sprintf (char * s, const char * format, ... );
+int tiny_snprintf (char * s, size_t n, const char * format, ... );
+int tiny_vsnprintf (char * s, size_t n, const char * format, va_list args );
+// support %c, %s, %d, %x, %u, %% for 32-bit values only. no width specs, left align
+// always zero-ended
+
 extern int errno;
 /* errors codes from KOS, but minus */
 #ifndef E_SUCCESS
diff --git a/programs/develop/ktcc/trunk/libc/include/stdlib.h b/programs/develop/ktcc/trunk/libc/include/stdlib.h
index 79719f1bfe..a5d4dc2324 100644
--- a/programs/develop/ktcc/trunk/libc/include/stdlib.h
+++ b/programs/develop/ktcc/trunk/libc/include/stdlib.h
@@ -12,8 +12,8 @@
 
 extern int atoib(char *s,int b);
 extern int atoi(char *s);
-extern char *itoab(int n,char* s,int  b);
-extern char *itoa(int n,char* s);
+extern char *itoab(unsigned int n,char* s,int  b);
+extern char *__itoa(int n,char* s);
 
 extern void* stdcall malloc(dword size);
 extern void  stdcall free(void *pointer);
@@ -25,6 +25,8 @@ extern void srand (unsigned int seed);
 double strtod (const char* str, char** endptr);
 long double strtold (const char* str, char** endptr);
 float strtof (const char* str, char** endptr);
+long int strtol (const char* str, char** endptr, int base);
+#define strtoul(s, ep, b) ((unsigned long int)strtol(s, ep, b))
 
 void* calloc (size_t num, size_t size);
 
@@ -41,5 +43,8 @@ typedef div_t ldiv_t;
 div_t div (int numer, int denom);
 #define ldiv(a, b) div(a, b)
 #define atol(a) atoi(a)
+#define atof(a) strtod(a, NULL)
+
+
 
 #endif
diff --git a/programs/develop/ktcc/trunk/libc/start/start.asm b/programs/develop/ktcc/trunk/libc/start/start.asm
index 090dda6c73..200b7e58ac 100644
--- a/programs/develop/ktcc/trunk/libc/start/start.asm
+++ b/programs/develop/ktcc/trunk/libc/start/start.asm
@@ -28,9 +28,10 @@ start:
 
 ;DEBUGF ' path "%s"\n params "%s"\n', .path, .params
 ; check for overflow
-    mov  al, [path+buf_len-1]
-    or	 al, [params+buf_len-1]
-    jnz   .crash
+;; that not work
+;    mov  al, [path+buf_len-1]
+;    or	 al, [params+buf_len-1]
+;    jnz   .crash
 ; check if path written by OS
     mov  eax, [hparams]
     test eax, eax
@@ -126,13 +127,13 @@ public argc as '__argc'
 public params as '__argv'
 public path as '__path'
 
-section '.bss'
+section '.bss' 
 buf_len = 0x400
 max_parameters=0x20
 argc	 rd 1
 argv	 rd max_parameters
-path	 rb buf_len
-params	 rb buf_len
+path	 rb buf_len 
+params	 rb buf_len 
 
 ;section '.data'
 ;include_debug_strings ; ALWAYS present in data section
\ No newline at end of file
diff --git a/programs/develop/ktcc/trunk/libc/stdio/scanf.c b/programs/develop/ktcc/trunk/libc/stdio/scanf.c
index 1594283d69..01093ea0ff 100644
--- a/programs/develop/ktcc/trunk/libc/stdio/scanf.c
+++ b/programs/develop/ktcc/trunk/libc/stdio/scanf.c
@@ -47,7 +47,7 @@ int vscanf ( const char * format, va_list arg )
     return format_scan(NULL, format, arg, &virtual_getc_con, &virtual_ungetc_con);
 };
 
-int kos_scanf ( const char * format, ...)
+int scanf ( const char * format, ...)
 {
    va_list      arg;
    int  n;
diff --git a/programs/develop/ktcc/trunk/libc/stdio/sprintf_tiny.c b/programs/develop/ktcc/trunk/libc/stdio/sprintf_tiny.c
new file mode 100644
index 0000000000..4c0810b5b4
--- /dev/null
+++ b/programs/develop/ktcc/trunk/libc/stdio/sprintf_tiny.c
@@ -0,0 +1,97 @@
+/*
+        function for format output to the string. much lighter than standard sprintf
+        because of lesser formats supported
+*/
+
+
+#include <string.h>
+//#include <stdio.h>
+#include <ctype.h>
+#include <stdarg.h>
+
+char* __itoa(int n,char* s);
+char* itoab(unsigned int n, char* s, int  b);
+
+int tiny_vsnprintf (char * s, size_t n, const char * format, va_list args )
+// support %c, %s, %d, %x, %u, %% for 32-bit values only. no width specs, left align
+// always zero-ended
+{
+    char *fmt, *dest, buf[32];
+    fmt = (char*)format;
+    dest = s; dest[n - 1] = '\0';
+    int     arg, len;
+    while (*fmt && (dest - s < n - 1))
+    {
+        if (*fmt != '%')
+        {
+            *dest++ = *fmt++;
+            continue;
+        }
+        if (fmt[1] == '%') // %%
+        {
+            *dest++ = '%';
+            fmt += 2;
+            continue;
+        }
+        arg = va_arg(args, int);
+        len = n - 1 - (dest - s);
+        switch (*++fmt)
+        {
+        case 'c':
+            *dest++ = (char)arg;
+            break;
+        case 's':
+            strncpy(dest, (char*)arg, len);
+            dest = strchr(dest, 0);
+            break;
+        case 'd':
+            __itoa(arg, buf);
+            strncpy(dest, buf, len);
+            dest = strchr(dest, 0);
+            break;
+        case 'x':
+            itoab((unsigned)arg, buf, 16);
+            strncpy(dest, buf, len);
+            dest = strchr(dest, 0);
+            break;
+        case 'u':
+            itoab((unsigned)arg, buf, 10);
+            strncpy(dest, buf, len);
+            dest = strchr(dest, 0);
+            break;
+        default:
+            *dest++ = *fmt;
+        }
+        fmt++;
+    }
+    *dest = '\0';
+    return dest - s;
+}
+
+
+int tiny_snprintf (char * s, size_t n, const char * format, ... )
+{
+   va_list      arg;
+   int  rc;
+   va_start(arg, format);
+
+   rc = tiny_vsnprintf(s, n, format, arg);
+
+   va_end(arg);
+   return rc;
+}
+
+int tiny_sprintf (char * s, const char * format, ... )
+{
+   va_list      arg;
+   int  rc;
+   va_start(arg, format);
+
+   rc = tiny_vsnprintf(s, 4096, format, arg);
+
+   va_end(arg);
+   return rc;
+}
+
+
+
diff --git a/programs/develop/ktcc/trunk/libc/stdlib/itoa.c b/programs/develop/ktcc/trunk/libc/stdlib/itoa.c
index 529243fcf4..8839cb565c 100644
--- a/programs/develop/ktcc/trunk/libc/stdlib/itoa.c
+++ b/programs/develop/ktcc/trunk/libc/stdlib/itoa.c
@@ -4,13 +4,17 @@
 #include <string.h>
 
 /*
-** itoa(n,s) - Convert n to characters in s 
+** itoa(n,s) - Convert n to characters in s
 */
-char* itoa(int n,char* s)
+char* __itoa(int n,char* s)
 {
   int sign;
   char *ptr;
   ptr = s;
+
+  if(n == (int)0x80000000)
+    return strcpy(s, "-2147483648");  // overflowed -n
+
   if ((sign = n) < 0) n = -n;
   do {
     *ptr++ = n % 10 + '0';
diff --git a/programs/develop/ktcc/trunk/libc/stdlib/itoab.c b/programs/develop/ktcc/trunk/libc/stdlib/itoab.c
index 6e639058f4..d7fb98c210 100644
--- a/programs/develop/ktcc/trunk/libc/stdlib/itoab.c
+++ b/programs/develop/ktcc/trunk/libc/stdlib/itoab.c
@@ -7,7 +7,7 @@
 ** itoab(n,s,b) - Convert "unsigned" n to characters in s using base b.
 **                NOTE: This is a non-standard function.
 */
-char* itoab(int n,char* s,int  b)
+char* itoab(unsigned int n, char* s, int  b)
 {
   char *ptr;
   int lowbit;
@@ -15,7 +15,7 @@ char* itoab(int n,char* s,int  b)
   b >>= 1;
   do {
     lowbit = n & 1;
-    n = (n >> 1) & 32767;
+    n = (n >> 1) & 0x7FFFFFFF;
     *ptr = ((n % b) << 1) + lowbit;
     if(*ptr < 10) *ptr += '0'; else *ptr += 55;
     ++ptr;
diff --git a/programs/develop/ktcc/trunk/libc/stdlib/strtol.c b/programs/develop/ktcc/trunk/libc/stdlib/strtol.c
new file mode 100644
index 0000000000..a9141520e3
--- /dev/null
+++ b/programs/develop/ktcc/trunk/libc/stdlib/strtol.c
@@ -0,0 +1,78 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <ctype.h>
+
+#define LONG_MIN (-2147483647L-1)
+#define LONG_MAX (2147483647L)
+#define ULONG_MAX (4294967295UL)
+
+
+int getdigit(char ch, int base)
+{
+	if (isdigit(ch)) ch-= '0';
+    	else
+    if (isalpha(ch) && ch <= 'Z') ch = 10 + ch - 'A';
+       	else
+    if (isalpha(ch)) ch = 10 + ch - 'a';
+    	else 
+    return -1;	
+   	
+   	if (ch / base != 0) return -1;	
+
+   	return ch;
+}
+
+
+long int strtol (const char* str, char** endptr, int base)
+{
+    long int res = 0;
+	int		sign = 1;
+
+	if (base > 36)
+	{
+		errno = EINVAL;
+	 	goto bye;
+	}
+
+	while (isspace(*str)) str++;
+
+	if (*str == '-') { sign = -1; str++; }
+		else
+	if (*str == '+') str++;
+
+	if (base == 0 || base == 16)
+	{
+		if (*str == '0' && (str[1] == 'x' || str[1] == 'X'))
+		{
+			base = 16;
+			str += 2;
+		}
+	}
+
+	if (base == 0 && *str == '0') base = 8;
+
+	if (base == 0) base = 10;
+
+
+	int digit;
+	while ((digit = getdigit(*str, base)) >= 0)
+	{
+		res = base * res + digit;
+		str++;
+		if (res < 0)
+		{
+			errno = ERANGE;
+			if (sign > 0)
+				res = LONG_MAX;
+			else
+				res = LONG_MIN;
+		}
+	}
+
+bye:
+	if (endptr)
+		*endptr = (char*)str;
+
+	return res * sign;
+}
+
diff --git a/programs/develop/ktcc/trunk/libc/string/memcmp.c b/programs/develop/ktcc/trunk/libc/string/memcmp.c
index e61e9af824..3401299f6f 100644
--- a/programs/develop/ktcc/trunk/libc/string/memcmp.c
+++ b/programs/develop/ktcc/trunk/libc/string/memcmp.c
@@ -10,6 +10,8 @@ int memcmp(const void* buf1,const void* buf2,size_t count)
 			return -1;
 		if (*(uc*)buf1>*(uc*)buf2)
 			return 1;
+		(uc*)buf1++;
+		(uc*)buf2++;
 	}
 	return 0;
 }
diff --git a/programs/develop/ktcc/trunk/samples/consoleio.c b/programs/develop/ktcc/trunk/samples/consoleio.c
new file mode 100644
index 0000000000..f2d72c9c80
--- /dev/null
+++ b/programs/develop/ktcc/trunk/samples/consoleio.c
@@ -0,0 +1,23 @@
+// demonstration conio use, color text
+// more info in conio.h
+
+#include <conio.h>
+
+int main()
+{
+	int i;
+	if (con_init_console_dll()) return 1; // init fail
+
+//    con_write_asciiz("\033[0;31;42m test  \n"); // red on green bk
+
+    for(i = 30; i < 48; i++)
+    {
+    	con_printf("\033[%dmColor 0x%02X: ", i, i);
+        con_write_asciiz("Text sample.");
+
+        con_printf("  printf %s test %d\n", "small", i);
+
+    }
+
+    con_exit(0);
+}
\ No newline at end of file
diff --git a/programs/develop/ktcc/trunk/samples/files.c b/programs/develop/ktcc/trunk/samples/files.c
new file mode 100644
index 0000000000..f6c8f1033e
--- /dev/null
+++ b/programs/develop/ktcc/trunk/samples/files.c
@@ -0,0 +1,43 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+int main(int argc, char **argv)
+{
+
+  int i;
+  char c;
+  FILE *f;
+  FILE *fin;
+  FILE *fout;
+
+  //write to file
+  f=fopen("testfile.txt","w");
+
+  for(i=0;i<50;i++)
+  {
+        fputc('1',f);
+  }
+  fclose(f);
+
+  //append to file
+  f=fopen("testfile.txt","a");
+
+  for(i=0;i<50;i++)
+  {
+        fputc('2',f);
+  }
+  fclose(f);
+
+  //copy from testfile.txt to copyfile.txt
+
+  fin=fopen("testfile.txt","r");
+  fout=fopen("copyfile.txt","w");
+
+  while((c=fgetc(fin))!=EOF)
+  {
+        fputc(c,fout);
+  }
+  fclose(fin);
+  fclose(fout);
+
+}
\ No newline at end of file
diff --git a/programs/develop/ktcc/trunk/samples/simplewin_old.c b/programs/develop/ktcc/trunk/samples/simplewin_old.c
new file mode 100644
index 0000000000..63bf266186
--- /dev/null
+++ b/programs/develop/ktcc/trunk/samples/simplewin_old.c
@@ -0,0 +1,61 @@
+
+// simple sample by Ghost
+
+#include <stdio.h>
+#include <string.h>
+#include <kolibrisys.h>
+
+#define FONT0           0
+#define FONT1           0x10000000
+
+#define BT_NORMAL       0
+#define BT_DEL          0x80000000
+#define BT_HIDE         0x40000000
+#define BT_NOFRAME      0x20000000
+
+char header[]={" -= C demo programm. Compiled whith KTCC halyavin and andrew_programmer port =-   "};
+
+void rotate_str(char *str){
+        char tmp;
+        int i;
+        tmp = str[0];
+        for(i = 1; str[i]; i++)str[i - 1] = str[i];
+        str[i - 1] = tmp;
+}
+
+void draw_window(){
+        static int offs = 0;
+        static int fcolor = 0;
+        static int col = 0;
+
+        _ksys_window_redraw(1);
+        _ksys_draw_window(100, 100, 300, 120, 0xaabbcc, 2, 0x5080d0, 0, 0x5080d0);
+        _ksys_write_text(6 - offs, 8, fcolor | FONT0, header, strlen(header));
+        _ksys_draw_bar(1, 6, 5, 13, 0x05080d0);
+        _ksys_draw_bar(274, 6, 26, 13, 0x05080d0);
+        _ksys_make_button(300 - 19, 5, 12, 12, 1 | BT_NORMAL, 0x6688dd);
+        _ksys_window_redraw(2);
+
+        offs = (offs + 1) % 6;
+        if(!offs)rotate_str(header);
+
+        fcolor += (col)?-0x80808:0x80808;
+        if(fcolor > 0xf80000 || fcolor == 0)col = !col;
+}
+
+int main(int argc, char **argv){
+
+        while(!0){
+                switch(_ksys_wait_for_event(10)){
+                case 2:return 0;
+
+                case 3:
+                        if(_ksys_get_button_id() == 1)return 0;
+                        break;
+
+                default:
+                        draw_window();
+                        break;
+                }
+        }
+}
diff --git a/programs/develop/ktcc/trunk/samples/winbasics.c b/programs/develop/ktcc/trunk/samples/winbasics.c
new file mode 100644
index 0000000000..8b8b82f370
--- /dev/null
+++ b/programs/develop/ktcc/trunk/samples/winbasics.c
@@ -0,0 +1,148 @@
+/*
+	newlib-style window example
+*/
+
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdarg.h>
+#include "kos32sys1.h"
+
+struct kolibri_system_colors sys_color_table;
+
+char statusbar[255];
+char proc_info[1024];
+char text_line[255];
+
+enum BUTTONS
+{
+    BTN_QUIT = 1,
+    BTN_POP = 10,
+    BTN_UNLOCK = 11
+};
+
+#define FONT_W 8
+#define FONT_H 14
+#define LINES 10
+
+void draw_window()
+{
+    int win_hight, win_width, i, pos_y = get_skin_height() + 36;  // 60 == 24+36
+
+    // start redraw
+    begin_draw();
+	// define&draw window
+	sys_create_window(10, 40, 600, 400, "My window", /*sys_color_table.work_area*/0xFFFFFF, 0x13);
+
+    get_proc_info(proc_info);
+    win_width = *(int*)(proc_info + 0x3E); // client, 2A windows
+    win_hight = *(int*)(proc_info + 0x42); // client, 2E windows
+
+	define_button((10 << 16) + 80, (30 << 16) + 20, BTN_POP, sys_color_table.work_button);
+    draw_text_sys("BUTTON1", 15, 34, 0, 0x90000000 | sys_color_table.work_button_text);  //0x80000000 asciiz
+
+	define_button((100 << 16) + 100, (30 << 16) + 20, BTN_UNLOCK, sys_color_table.work_button);
+    draw_text_sys("BUTTTON2", 110, 34, 0, 0x90000000 | sys_color_table.work_button_text);
+
+    // display statusbar
+    draw_bar(6, win_hight - 17, win_width - 11, 12, 0x80000000 | sys_color_table.work_area);  //0x80000000 gradient
+    draw_text_sys(statusbar, 10, win_hight - 15, 0, 0x80000000 | sys_color_table.work_text);
+
+    // display strings
+    for (i = LINES; i > 0; i--)
+    {
+        tiny_snprintf (text_line, sizeof text_line, "Line[%d]<<Just a text>>", i);
+
+        text_line[(win_width - 10 - 5) / FONT_W + 1] = '\0'; // clip text size, seems to big lines crashing OS, and form len by window size
+//        draw_number_sys(nbytes, 5, pos_y, 6, 0x10000000); 8x12 font
+        draw_text_sys(text_line, 5, pos_y, 0, 0x90000000 /*| sys_color_table.work_text*/);
+        pos_y += FONT_H;
+
+        if(pos_y + 29 > win_hight) break; // 12 font + 12 statusbar + 5 border
+    }
+
+    // end redraw
+    end_draw();
+}
+
+int main()
+{
+    int gui_event;
+    uint32_t pressed_button = 0, mouse_button;
+    pos_t   mouse_pos;
+    strcpy(statusbar, "Program running...Double click on TEXT for details");
+
+    get_system_colors(&sys_color_table);
+    set_event_mask(0xC0000027); // mouse events only when focused window and mouse inside
+
+    do  /* Start of main activity loop */
+    {
+//        gui_event = wait_for_event(10); // 100 = 1 sec, case you have background work
+        gui_event = get_os_event(); 
+        switch(gui_event)
+        {
+        case KOLIBRI_EVENT_NONE:
+            // background work
+			break;
+        case KOLIBRI_EVENT_REDRAW:
+            draw_window();
+			break;
+        case KOLIBRI_EVENT_KEY:
+            // scroll
+			break;
+        case KOLIBRI_EVENT_BUTTON:
+            pressed_button = get_os_button();
+            switch (pressed_button)
+            {
+              case BTN_POP:
+                strcpy(statusbar, "POP pressed....");
+                draw_window();
+                break;
+              case BTN_UNLOCK:
+                strcpy(statusbar, "UNLOCK pressed....");
+                draw_window();
+                break;
+              case BTN_QUIT:
+                return 0;
+                break;
+            }
+            break;
+        case KOLIBRI_EVENT_MOUSE:
+            mouse_pos = get_mouse_pos(POS_WINDOW); // window relative
+            mouse_button = get_mouse_eventstate();
+            debug_board_printf("mouse ev (%d,%d)%x\n", mouse_pos.x, mouse_pos.y, mouse_button);
+            if (mouse_button & (1<<24)) // double click
+            {
+                int n = (mouse_pos.y - 60) / FONT_H;
+                if (n < 0 || n >= LINES) break;
+                debug_board_printf("click on str(%d), clip slot(%d)\n", n, LINES - n - 1);
+                tiny_sprintf(statusbar, "click on str(%d), clip slot(%d)\n", n, LINES - n - 1);
+		draw_window();
+            }
+            // ignore
+            break;
+        }
+    } while(1) ; /* End of main activity loop */
+
+  return 0;
+}
+
+
+
+void __attribute__ ((noinline)) debug_board_write_str(const char* str){
+  while(*str)
+    debug_board_write_byte(*str++);
+}
+
+void __attribute__ ((noinline)) debug_board_printf(const char *format,...)
+{
+        va_list ap;
+        char log_board[300];
+
+        va_start (ap, format);
+        tiny_vsnprintf(log_board, sizeof log_board, format, ap);
+        va_end(ap);
+        debug_board_write_str(log_board);
+
+}
diff --git a/programs/develop/ktcc/trunk/source/readme_kos32.txt b/programs/develop/ktcc/trunk/source/readme_kos32.txt
index 64b3635905..11831ab263 100644
--- a/programs/develop/ktcc/trunk/source/readme_kos32.txt
+++ b/programs/develop/ktcc/trunk/source/readme_kos32.txt
@@ -18,8 +18,6 @@ otherwise (error) underscoring all symbols, not only cdecl
 -silent (kos) -> writes to debugboard
 -impossible using with mingw-gcc compiled lib, incompatible library format:
  .o is PE-format from gcc but ELF from tcc, may be linux-gcc does it ok
--no symbols (mapfile) for debug, see howtodebugtcc
--no debug info for -g (kos32 linker imperfection)
 -__fastcall incompatible with other compilers. now stack freed by caller. 
  must fix i386-gen.c@490,572 (fixed in other branch https://github.com/mirror/tinycc)
 
@@ -30,8 +28,6 @@ otherwise (error) underscoring all symbols, not only cdecl
 -not working: default search path are ./include ./lib from executable 
 --under KOS need to use -Bpath_to_ktcc
 --start.o not found using -B (kos) - put near your.c file
--if static var sized more than 14096+ -> crash compiled .exe (kos) 
----^ stack size set in menuet header at compile time tccmeos.c:177 about 4k
 -bench timing coarse (0s or 1s), no usec in newlib gettimeofday. OK
 
 Tests status:
@@ -93,9 +89,6 @@ setvbuf
 
 
 stdlib.h:
-atof
-atol
-strtol, strtoul
 atexit
 getenv
 system
@@ -114,13 +107,12 @@ strxfrm
             Status or libc tests
 
 ---FAILED---
-tstring	- need to fix
+strtoul incorrect work with big unsigned > MAX_LONG
 
 
 ---NOT TESTED---
 no library fns realized
 qsort
-strtol
 time
 
 ---HANG---
@@ -129,9 +121,9 @@ sscanf
 
 
 ---STACK IS SMALL---
+use new -stack=1280000 option to pass test
 tstring	
 strtodlong
-use new -stack=1280000 option
 
 
 --other--
@@ -141,6 +133,7 @@ fscanf
 
 snprintf
 -some format misturbances
+-may incorrect prints unsigned > 2147483647L
 
 ungetc
 -ungetc fails if filepos == 0 - no tricks
diff --git a/programs/develop/ktcc/trunk/source/tccmeos.c b/programs/develop/ktcc/trunk/source/tccmeos.c
index b02ba0dd44..e8d38c68ce 100644
--- a/programs/develop/ktcc/trunk/source/tccmeos.c
+++ b/programs/develop/ktcc/trunk/source/tccmeos.c
@@ -358,7 +358,8 @@ int tcc_output_dbgme(const char *filename, me_info* me)
 // return 1 on error
 {
 	FILE 	*fdbg;
-	char	fname[400], buf[200];
+	char	fname[400],
+            buf[80]; // no more fits in mtdbg string
 
 	strcpy(fname, filename);
 	strcat(fname, ".dbg");