diff --git a/Makefile b/Makefile
index d51bd55..2cf31f5 100644
--- a/Makefile
+++ b/Makefile
@@ -23,7 +23,7 @@ OBJDUMP	:= objdump
 # 查询可重定位文件符号表
 NM	:= nm
 
-DEFS	:= -D USE_FBCON 
+DEFS	:= 
 
 # gcc的相关命令参数
 # $(DEFS) 定义一些可能的参数
@@ -182,4 +182,4 @@ $(OBJDIR)/.deps: $(foreach dir, $(OBJDIRS), $(wildcard $(OBJDIR)/$(dir)/*.d))
 
 -include $(OBJDIR)/.deps
 
-.PHONY: all clean run gdb gdb-no-graphic monitor disassemble
\ No newline at end of file
+.PHONY: all clean run gdb gdb-no-graphic monitor disassemble
diff --git a/kernel/bga.c b/kernel/bga.c
index 84986fa..cd0a4e4 100644
--- a/kernel/bga.c
+++ b/kernel/bga.c
@@ -112,7 +112,7 @@ int init_bga(pci_dev_t *dev) {
     }
 
     bga_buf_paddr = pci_read_bar(dev, 0) & 0xfffffff0;
-    bga_set_resolution(800, 600);
+    bga_set_resolution(1024, 768);
     kprintf("bga buf paddr=%p; buf size= %d KB\n", bga_buf_paddr,
             bga_screen_buffer_size / 1024);
     kprintf("bga mapped in kernel cr3=%p\n", read_cr3());
diff --git a/kernel/exec.c b/kernel/exec.c
index b8681bb..e6ba753 100644
--- a/kernel/exec.c
+++ b/kernel/exec.c
@@ -141,6 +141,7 @@ static u32 exec_elfcpy(u32 fd, Elf32_Phdr Echo_Phdr, u32 attribute) // 这部分
 			// 已初始化数据段拷贝完毕，剩下的是未初始化的数据段，在内存中填0
 			*((u8 *)lin_addr) = 0; // memset((void*)lin_addr,0,1);
 		}
+		if (!(lin_addr & 0x3f)) kprintf(".");
 	}
 	return 0;
 }
@@ -158,6 +159,7 @@ static u32 exec_load(u32 fd, const Elf32_Ehdr *Echo_Ehdr, const Elf32_Phdr Echo_
 		kprintf("\x1b[31;47mexec_load: elf ERROR!\x1b[m", 0x74);
 		return -1;
 	}
+	kprintf("loading elf from file");
 
 	// 我们还不能确定elf中一共能有几个program，但就目前我们查看过的elf文件中，只出现过两中program，一种.text（R-E）和一种.data（RW-）
 	for (ph_num = 0; ph_num < Echo_Ehdr->e_phnum; ph_num++)
@@ -186,6 +188,7 @@ static u32 exec_load(u32 fd, const Elf32_Ehdr *Echo_Ehdr, const Elf32_Phdr Echo_
 			return -1;
 		}
 	}
+	kprintf("[\x1b[32mok\x1b[0m]\n");
 	return 0;
 }
 
diff --git a/kernel/ktest.c b/kernel/ktest.c
index 9ebf2aa..59bcafb 100644
--- a/kernel/ktest.c
+++ b/kernel/ktest.c
@@ -151,9 +151,9 @@ void initial()
 	do_vclose(stdout);
 	do_vclose(stderr);
 #ifdef USE_FBCON
-	exec("orange/shell_0.bin");
+	exec("orange/shell_chn.bin");
 #else
-	exec("orange/shell_1.bin");
+	exec("orange/shell_mix.bin");
 #endif
 	while (1)
 		;
diff --git a/lib/kprintf.c b/lib/kprintf.c
index 003ade1..3e72a88 100644
--- a/lib/kprintf.c
+++ b/lib/kprintf.c
@@ -10,8 +10,8 @@ static void kprintfputch(int ch, int *cnt)
 {
 	write_serial(ch);
 #ifndef USE_FBCON
-	char _ch = ch;
-	tty_write(cur_ntty, &_ch, 1);
+	// char _ch = ch;
+	//tty_write(cur_ntty, &_ch, 1);
 #endif
 	(*cnt)++;
 }
diff --git a/user/Makefrag b/user/Makefrag
index 18b2e3e..66537ae 100644
--- a/user/Makefrag
+++ b/user/Makefrag
@@ -6,11 +6,13 @@ USERLIB_OBJS	:= $(patsubst %.c, $(OBJDIR)/%.o, $(USERLIB_SRCS))
 USERLIB_OBJS	:= $(patsubst %.asm, $(OBJDIR)/%.o, $(USERLIB_OBJS))
 
 # 这里给我整不会了，文件名只能长度为16位，否则会寄，原因还挺难找
-USER_SRCS :=	user/shell_1.c		\
-		user/shell_0.c		\
-		user/test.c \
-		user/test2.c \
-		user/chtest.c \
+USER_SRCS :=	user/shell_2con.c \
+				user/shell_chn.c \
+				user/shell_mix.c \
+				user/shell_uart.c \
+				user/test2con.c \
+				user/testchn.c \
+				user/testscr.c \
 
 USER_BINS	:= $(patsubst %.c, $(OBJDIR)/%.bin, $(USER_SRCS))
 USER_BASENAMES	:= $(patsubst $(OBJDIR)/user/%, %, $(USER_BINS))
diff --git a/user/ptTest.c b/user/ptTest.c
deleted file mode 100644
index 8c169b0..0000000
--- a/user/ptTest.c
+++ /dev/null
@@ -1,41 +0,0 @@
-#include "stdio.h"
-
-int global=0;
-
-char *str2,*str3;
-
-
-void pthread_test1()
-{
-	int i;
-	//pthread(pthread_test2);
-	while(1)
-	{
-		printf("pth1");
-		printf("%d",++global);
-		printf(" ");
-		i=10000000;
-		while(--i){}
-	}
-}
-
-/*======================================================================*
-                          Syscall Pthread Test
-added by xw, 18/4/27
- *======================================================================*/
-
-int main(int arg,char *argv[])
-{
-	int i=0;
-	
-	pthread(pthread_test1);
-	while(1)
-	{
-		printf("init");
-		printf("%d",++global);
-		printf(" ");
-		i=10000000;
-		while(--i){}
-	}
-	return 0;
-}
diff --git a/user/shell_1.c b/user/shell_2con.c
similarity index 97%
rename from user/shell_1.c
rename to user/shell_2con.c
index b6914f6..21b189a 100644
--- a/user/shell_1.c
+++ b/user/shell_2con.c
@@ -43,7 +43,6 @@ int main(int arg, char *argv[])
             printf("\nminiOS:/ $ ");
             if (gets(buf) && strlen(buf) != 0)
             {
-                printf("received\n");
                 if (exec(buf) != 0)
                 {
                     printf("exec failed: file not found!\n");
diff --git a/user/shell_0.c b/user/shell_chn.c
similarity index 100%
rename from user/shell_0.c
rename to user/shell_chn.c
diff --git a/user/shell_mix.c b/user/shell_mix.c
new file mode 100644
index 0000000..3eb018d
--- /dev/null
+++ b/user/shell_mix.c
@@ -0,0 +1,31 @@
+#include "type.h"
+#include "const.h"
+#include "protect.h"
+#include "string.h"
+#include "proc.h"
+#include "global.h"
+#include "proto.h"
+#include "stdio.h"
+
+int main(int arg, char *argv[])
+{
+	int stdin = open("dev_tty2", O_RDWR);
+	int stdout = open("dev_tty0", O_RDWR);
+	int stderr = open("dev_tty0", O_RDWR);
+
+	char buf[1024];
+	int pid;
+	int times = 0;
+	while (1)
+	{
+		printf("miniOS:/ $ ");
+		if (gets(buf) && strlen(buf) != 0)
+		{
+			if (exec(buf) != 0)
+			{
+				printf("exec failed: file not found!\n");
+				continue;
+			}
+		}
+	}
+}
\ No newline at end of file
diff --git a/user/shell_uart.c b/user/shell_uart.c
new file mode 100644
index 0000000..7e69ded
--- /dev/null
+++ b/user/shell_uart.c
@@ -0,0 +1,31 @@
+#include "type.h"
+#include "const.h"
+#include "protect.h"
+#include "string.h"
+#include "proc.h"
+#include "global.h"
+#include "proto.h"
+#include "stdio.h"
+
+int main(int arg, char *argv[])
+{
+        int stdin = open("dev_tty2", O_RDWR);
+        int stdout = open("dev_tty2", O_RDWR);
+        int stderr = open("dev_tty2", O_RDWR);
+
+        char buf[1024];
+        int pid;
+        int times = 0;
+        while (1)
+        {
+            printf("\nminiOS:/ $ ");
+            if (gets(buf) && strlen(buf) != 0)
+            {
+                if (exec(buf) != 0)
+                {
+                    printf("exec failed: file not found!\n");
+                    continue;
+                }
+            }
+        }
+}
\ No newline at end of file
diff --git a/user/test.c b/user/test.c
deleted file mode 100644
index 8b4e992..0000000
--- a/user/test.c
+++ /dev/null
@@ -1,86 +0,0 @@
-#include "type.h"
-#include "const.h"
-#include "protect.h"
-#include "string.h"
-#include "proc.h"
-#include "global.h"
-#include "proto.h"
-#include "stdio.h"
-
-int main(int arg, char *argv[])
-{
-	int stdin = open("dev_tty0", O_RDWR);
-	int stdout = open("dev_tty0", O_RDWR);
-	int stderr = open("dev_tty0", O_RDWR);
-
-	char buf[1024];
-	int pid;
-	int times = 0;
-	for (int i = 0; i < 50; ++i)
-	{
-		printf("test %d\n", i);
-		for (int j = 0; j < 2000000; ++ j);
-	}
-	// for (int i = 0; i < 2; ++i)
-	// {
-	// 	printf("\x1b[42;31m1111111111");
-	// 	// printf("\x1b[m1111111111");
-	// 	printf("2222222222");
-	// 	printf("3333333333");
-	// 	printf("4444444444");
-	// 	printf("5555555555");
-	// 	printf("6666666666");
-	// 	printf("7777777777");
-	// 	// printf("\x1b[5F");
-	// 	printf("8888888888");
-	// 	printf("9999999999\r\b\b\n");
-	// }
-	printf("\x1b[33m");
-
-	for (int i = 0; i < 40; i++)
-	{
-		printf("%d", i);
-		printf("11111111111111111\n");
-	}
-	printf("\x1b[31;47m555555555555\x1b[m");
-
-	// Cursor Up
-	// printf("\x1b[2A");
-
-	// Cursor down
-	// printf("\x1b[2B");
-
-	// Cursor Forward
-	// printf("\x1b[20C");
-
-	// Cursor Back
-	// printf("\x1b[2D");
-
-	// Cursor Next Line
-	// printf("\x1b[3E");
-
-	// Cursor Previous Line
-	// printf("\x1b[3F");
-
-	// Cursor Horizontal Absolute
-	// printf("\x1b[2G");
-
-	// Cursor Position ; H or f
-	// printf("\x1b[3;5H");
-
-	// Erase in Display
-	// printf("\x1b[3J");
-
-	// Erase in Line
-	// printf("\x1b[K");
-
-	// Scroll Up
-	// printf("\x1b[13S");
-
-	// Scroll Down
-	// printf("\x1b[13T");
-
-	while (1)
-		;
-	return 0;
-}
diff --git a/user/test2.c b/user/test2con.c
similarity index 100%
rename from user/test2.c
rename to user/test2con.c
diff --git a/user/chtest.c b/user/testchn.c
similarity index 100%
rename from user/chtest.c
rename to user/testchn.c
diff --git a/user/testscr.c b/user/testscr.c
new file mode 100644
index 0000000..57e04b0
--- /dev/null
+++ b/user/testscr.c
@@ -0,0 +1,29 @@
+#include "type.h"
+#include "const.h"
+#include "protect.h"
+#include "string.h"
+#include "proc.h"
+#include "global.h"
+#include "proto.h"
+#include "stdio.h"
+
+int main(int arg, char *argv[])
+{
+	int stdin = open("dev_tty0", O_RDWR);
+	int stdout = open("dev_tty0", O_RDWR);
+	int stderr = open("dev_tty0", O_RDWR);
+
+	for (int i = 0; i < 40; i++)
+	{
+		printf("%02d ", i);
+	}
+	for (int i = 0; i < 50; ++i)
+	{
+		printf("test %d\n", i);
+		for (int j = 0; j < 2000000; ++ j);
+	}
+
+	while (1)
+		;
+	return 0;
+}