diff --git a/27_day/bootpack.c b/27_day/bootpack.c
index d4ee11f..d4f821a 100644
--- a/27_day/bootpack.c
+++ b/27_day/bootpack.c
@@ -46,7 +46,7 @@ void HariMain(void)
 	};
 	int key_shift = 0, key_leds = (binfo->leds >> 4) & 7, keycmd_wait = -1;
 	int j, x, y, mmx = -1, mmy = -1, mmx2 = 0;
-	struct SHEET *sht = 0, *key_win;
+	struct SHEET *sht = 0, *key_win, *sht2;
 
 	init_gdtidt();
 	init_pic();
@@ -195,8 +195,8 @@ void HariMain(void)
 						io_cli(); /*强制结束处理时禁止任务切换*/
 						task->tss.eax = (int) &(task->tss.esp0);
 						task->tss.eip = (int) asm_end_app;
-						task_run(task, -1, 0); /*为了确实执行结束处理，如果处于休眠状态则唤醒*/
 						io_sti();
+						task_run(task, -1, 0); /*为了确实执行结束处理，如果处于休眠状态则唤醒*/
 					}
 				}
 				if (i == 256 + 0x3c && key_shift != 0) {	/* Shift+F2 */
@@ -267,10 +267,14 @@ void HariMain(void)
 												io_cli(); /*强制结束处理时禁止任务切换*/
 												task->tss.eax = (int) &(task->tss.esp0);
 												task->tss.eip = (int) asm_end_app;
-												task_run(task, -1, 0);
 												io_sti();
+												task_run(task, -1, 0);
 											} else { /*命令行窗口*/
 												task = sht->task;
+												sheet_updown(sht, -1); /*暂且隐藏该图层*/
+												keywin_off(key_win);
+												key_win = shtctl->sheets[shtctl->top - 1];
+												keywin_on(key_win);
 												io_cli();
 												fifo32_put(&task->fifo, 4);
 												io_sti();
@@ -301,6 +305,10 @@ void HariMain(void)
 				close_console(shtctl->sheets0 + (i - 768));
 			} else if (1024 <= i && i <= 2023) {
 				close_constask(taskctl->tasks0 + (i - 1024));
+			} else if (2024 <= i && i <= 2279) { /*只关闭命令行窗口*/
+				sht2 = shtctl->sheets0 + (i - 2024);
+				memman_free_4k(memman, (int) sht2->buf, 256 * 165);
+				sheet_free(sht2);
 			}
 		}
 	}
diff --git a/27_day/console.c b/27_day/console.c
index f85ec8c..536aa8f 100644
--- a/27_day/console.c
+++ b/27_day/console.c
@@ -17,7 +17,7 @@ void console_task(struct SHEET *sheet, int memtotal)
 	cons.cur_c = -1;
 	task->cons = &cons;
 
-	if (sheet != 0) {
+	if (cons.sht != 0) {
 		cons.timer = timer_alloc();
 		timer_init(cons.timer, &task->fifo, 1);
 		timer_settime(cons.timer, 50);
@@ -35,7 +35,7 @@ void console_task(struct SHEET *sheet, int memtotal)
 		} else {
 			i = fifo32_get(&task->fifo);
 			io_sti();
-			if (i <= 1) { /*光标用定时器*/
+			if (i <= 1 && cons.sht != 0) { /*光标用定时器*/
 				if (i != 0) {
 					timer_init(cons.timer, &task->fifo, 0); /*下次置0 */
 					if (cons.cur_c >= 0) {
@@ -53,7 +53,10 @@ void console_task(struct SHEET *sheet, int memtotal)
 				cons.cur_c = COL8_FFFFFF;
 			}
 			if (i == 3) { /*光标OFF */
-				boxfill8(sheet->buf, sheet->bxsize, COL8_000000, cons.cur_x, cons.cur_y, cons.cur_x + 7, cons.cur_y + 15);
+				if (cons.sht != 0) {
+					boxfill8(cons.sht->buf, cons.sht->bxsize, COL8_000000,
+						cons.cur_x, cons.cur_y, cons.cur_x + 7, cons.cur_y + 15);
+				}
 				cons.cur_c = -1;
 			}
 			if (i == 4) { /*点击命令行窗口的“×”按钮*/ 
@@ -74,7 +77,7 @@ void console_task(struct SHEET *sheet, int memtotal)
 					cmdline[cons.cur_x / 8 - 2] = 0;
 					cons_newline(&cons);
 					cons_runcmd(cmdline, &cons, fat, memtotal); /*运行命令*/
-					if (sheet == 0) {
+					if (cons.sht == 0) {
 						cmd_exit(&cons, fat);
 					}
 					/*显示提示符*/
@@ -89,11 +92,12 @@ void console_task(struct SHEET *sheet, int memtotal)
 				}
 			}
 			/*重新显示光标*/
-			if (sheet != 0) {
+			if (cons.sht != 0) {
 				if (cons.cur_c >= 0) {
-					boxfill8(sheet->buf, sheet->bxsize, cons.cur_c, cons.cur_x, cons.cur_y, cons.cur_x + 7, cons.cur_y + 15);
+					boxfill8(cons.sht->buf, cons.sht->bxsize, cons.cur_c, 
+						cons.cur_x, cons.cur_y, cons.cur_x + 7, cons.cur_y + 15);
 				}
-				sheet_refresh(sheet, cons.cur_x, cons.cur_y, cons.cur_x + 8, cons.cur_y + 16);
+				sheet_refresh(cons.sht, cons.cur_x, cons.cur_y, cons.cur_x + 8, cons.cur_y + 16);
 			}
 		}
 	}
@@ -108,8 +112,8 @@ void cons_putchar(struct CONSOLE *cons, int chr, char move)
 		for (;;) {
 			if (cons->sht != 0) {
 				putfonts8_asc_sht(cons->sht, cons->cur_x, cons->cur_y, COL8_FFFFFF, COL8_000000, " ", 1);
-				cons->cur_x += 8;
 			}
+			cons->cur_x += 8;
 			if (cons->cur_x == 8 + 240) {
 				cons_newline(cons);
 			}
@@ -194,8 +198,8 @@ void cons_runcmd(char *cmdline, struct CONSOLE *cons, int *fat, int memtotal)
 	} else if (strncmp(cmdline, "start ", 6) == 0) {
 		cmd_start(cons, cmdline, memtotal);
 	} else if (strncmp(cmdline, "ncst ", 5) == 0) {
-		cmd_ncst(cons, cmdline, memtotal); 
-	}else if (cmdline[0] != 0) {
+		cmd_ncst(cons, cmdline, memtotal);
+	} else if (cmdline[0] != 0) {
 		if (cmd_app(cons, fat, cmdline) == 0) {
 			/*不是命令，不是应用程序，也不是空行*/
 			cons_putstr0(cons, "Bad command.\n\n");
@@ -403,6 +407,7 @@ int *hrb_api(int edi, int esi, int ebp, int esp, int ebx, int edx, int ecx, int
 	struct CONSOLE *cons = task->cons;
 	struct SHTCTL *shtctl = (struct SHTCTL *) *((int *) 0x0fe4);
 	struct SHEET *sht;
+	struct FIFO32 *sys_fifo = (struct FIFO32 *) *((int *) 0x0fec);
 	int *reg = &eax + 1; /* eax后面的地址*/
 	/*强行改写通过PUSHAD保存的值*/
 		/* reg[0] : EDI,   reg[1] : ESI,   reg[2] : EBP,   reg[3] : ESP */
@@ -490,6 +495,13 @@ int *hrb_api(int edi, int esi, int ebp, int esp, int ebx, int edx, int ecx, int
 			if (i == 3) { /*光标OFF */
 				cons->cur_c = -1;
 			}
+			if (i == 4) { /*只关闭命令行窗口*/
+				timer_cancel(cons->timer);
+				io_cli();
+				fifo32_put(sys_fifo, cons->sht - shtctl->sheets0 + 2024); /*2024～2279*/
+				cons->sht = 0;
+				io_sti();
+			}
 			if (i >= 256) { /*键盘数据（通过任务A）等*/
 				reg[7] = i - 256;
 				return 0;