diff --git a/17_day/bootpack.c b/17_day/bootpack.c
index 760c123..78e4a77 100644
--- a/17_day/bootpack.c
+++ b/17_day/bootpack.c
@@ -6,7 +6,7 @@
 void make_window8(unsigned char *buf, int xsize, int ysize, char *title, char act);
 void putfonts8_asc_sht(struct SHEET *sht, int x, int y, int c, int b, char *s, int l);
 void make_textbox8(struct SHEET *sht, int x0, int y0, int sx, int sy, int c);
-void task_b_main(struct SHEET *sht_win_b);
+void console_task(struct SHEET *sheet);
 
 void HariMain(void)
 {
@@ -27,9 +27,9 @@ void HariMain(void)
 		0, 0, 0, 0, 0, 0, 0, '7', '8', '9', '-', '4', '5', '6', '+', '1',
 		'2', '3', '0', '.'
 	};
-	unsigned char *buf_back, buf_mouse[256], *buf_win, *buf_win_b;
-	struct SHEET *sht_back, *sht_mouse, *sht_win, *sht_win_b[3];
-	struct TASK *task_a, *task_b[3];
+	unsigned char *buf_back, buf_mouse[256], *buf_win, *buf_cons;
+	struct SHEET *sht_back, *sht_mouse, *sht_win, *sht_cons;
+	struct TASK *task_a, *task_cons;
 	struct TIMER *timer;
 
 	init_gdtidt();
@@ -59,29 +59,27 @@ void HariMain(void)
 	sheet_setbuf(sht_back, buf_back, binfo->scrnx, binfo->scrny, -1); /* 无透明色 */
 	init_screen8(buf_back, binfo->scrnx, binfo->scrny);
 
-	/* sht_win_b */
-	for (i = 0; i < 3; i++) {
-		sht_win_b[i] = sheet_alloc(shtctl);
-		buf_win_b = (unsigned char *) memman_alloc_4k(memman, 144 * 52);
-		sheet_setbuf(sht_win_b[i], buf_win_b, 144, 52, -1); /* 无透明色 */
-		sprintf(s, "task_b%d", i);
-		make_window8(buf_win_b, 144, 52, s, 0);
-		task_b[i] = task_alloc();
-		task_b[i]->tss.esp = memman_alloc_4k(memman, 64 * 1024) + 64 * 1024 - 8;
-		task_b[i]->tss.eip = (int) &task_b_main;
-		task_b[i]->tss.es = 1 * 8;
-		task_b[i]->tss.cs = 2 * 8;
-		task_b[i]->tss.ss = 1 * 8;
-		task_b[i]->tss.ds = 1 * 8;
-		task_b[i]->tss.fs = 1 * 8;
-		task_b[i]->tss.gs = 1 * 8;
-		*((int *) (task_b[i]->tss.esp + 4)) = (int) sht_win_b[i];
-		/* task_run(task_b[i], 2, i + 1); */
-	}
+	/* sht_cons */
+	sht_cons = sheet_alloc(shtctl);
+	buf_cons = (unsigned char *) memman_alloc_4k(memman, 256 * 165);
+	sheet_setbuf(sht_cons, buf_cons, 256, 165, -1); /* 无透明色 */
+	make_window8(buf_cons, 256, 165, "console", 0);
+	make_textbox8(sht_cons, 8, 28, 240, 128, COL8_000000);
+	task_cons = task_alloc();
+	task_cons->tss.esp = memman_alloc_4k(memman, 64 * 1024) + 64 * 1024 - 8;
+	task_cons->tss.eip = (int) &console_task;
+	task_cons->tss.es = 1 * 8;
+	task_cons->tss.cs = 2 * 8;
+	task_cons->tss.ss = 1 * 8;
+	task_cons->tss.ds = 1 * 8;
+	task_cons->tss.fs = 1 * 8;
+	task_cons->tss.gs = 1 * 8;
+	*((int *) (task_cons->tss.esp + 4)) = (int) sht_cons;
+	task_run(task_cons, 2, 2); /* level=2, priority=2 */
 
 	/* sht_win */
-	sht_win   = sheet_alloc(shtctl);
-	buf_win   = (unsigned char *) memman_alloc_4k(memman, 160 * 52);
+	sht_win  = sheet_alloc(shtctl);
+	buf_win  = (unsigned char *) memman_alloc_4k(memman, 160 * 52);
 	sheet_setbuf(sht_win, buf_win, 144, 52, -1); /* 无透明色 */
 	make_window8(buf_win, 144, 52, "task_a", 1);
 	make_textbox8(sht_win, 8, 28, 128, 16, COL8_FFFFFF);
@@ -99,17 +97,13 @@ void HariMain(void)
 	my = (binfo->scrny - 28 - 16) / 2;
 
 	sheet_slide(sht_back, 0, 0);
-	sheet_slide(sht_win_b[0], 168,  56);
-	sheet_slide(sht_win_b[1],   8, 116);
-	sheet_slide(sht_win_b[2], 168, 116);
-	sheet_slide(sht_win,        8,  56);
+	sheet_slide(sht_cons, 32, 4);
+	sheet_slide(sht_win, 64, 56);
 	sheet_slide(sht_mouse, mx, my);
-	sheet_updown(sht_back,     0);
-	sheet_updown(sht_win_b[0], 1);
-	sheet_updown(sht_win_b[1], 2);
-	sheet_updown(sht_win_b[2], 3);
-	sheet_updown(sht_win,      4);
-	sheet_updown(sht_mouse,    5);
+	sheet_updown(sht_back, 0);
+	sheet_updown(sht_cons, 1);
+	sheet_updown(sht_win, 2);
+	sheet_updown(sht_mouse, 3);
 	sprintf(s, "(%3d, %3d)", mx, my);
 	putfonts8_asc_sht(sht_back, 0, 0, COL8_FFFFFF, COL8_008484, s, 10);
 	sprintf(s, "memory %dMB   free : %dKB",
@@ -274,31 +268,37 @@ void make_textbox8(struct SHEET *sht, int x0, int y0, int sx, int sy, int c)
 	return;
 }
 
-void task_b_main(struct SHEET *sht_win_b)
+void console_task(struct SHEET *sheet)
 {
 	struct FIFO32 fifo;
-	struct TIMER *timer_1s;
-	int i, fifobuf[128], count = 0, count0 = 0;
-	char s[12];
+	struct TIMER *timer;
+	struct TASK *task = task_now();
 
-	fifo32_init(&fifo, 128, fifobuf, 0);
-	timer_1s = timer_alloc();
-	timer_init(timer_1s, &fifo, 100);
-	timer_settime(timer_1s, 100);
+	int i, fifobuf[128], cursor_x = 8, cursor_c = COL8_000000;
+	fifo32_init(&fifo, 128, fifobuf, task);
+	timer = timer_alloc();
+	timer_init(timer, &fifo, 1);
+	timer_settime(timer, 50);
 
 	for (;;) {
-		count++;
 		io_cli();
 		if (fifo32_status(&fifo) == 0) {
+			task_sleep(task);
 			io_sti();
 		} else {
 			i = fifo32_get(&fifo);
 			io_sti();
-			if (i == 100) {
-				sprintf(s, "%11d", count - count0);
-				putfonts8_asc_sht(sht_win_b, 24, 28, COL8_000000, COL8_C6C6C6, s, 11);
-				count0 = count;
-				timer_settime(timer_1s, 100);
+			if (i <= 1) { /*光标用定时器*/
+				if (i != 0) {
+					timer_init(timer, &fifo, 0); /*下次置0 */
+					cursor_c = COL8_FFFFFF;
+				} else {
+					timer_init(timer, &fifo, 1); /*下次置1 */
+					cursor_c = COL8_000000;
+				}
+				timer_settime(timer, 50);
+				boxfill8(sheet->buf, sheet->bxsize, cursor_c, cursor_x, 28, cursor_x + 7, 43);
+				sheet_refresh(sheet, cursor_x, 28, cursor_x + 8, 44);
 			}
 		}
 	}