diff --git a/18_day/bootpack.c b/18_day/bootpack.c
index ee32bf7..0d09cbb 100644
--- a/18_day/bootpack.c
+++ b/18_day/bootpack.c
@@ -190,10 +190,12 @@ void HariMain(void)
 						key_to = 1;
 						make_wtitle8(buf_win, sht_win->bxsize, "task_a", 0);
 						make_wtitle8(buf_cons, sht_cons->bxsize, "console", 1);
+						cursor_c = -1; /* 不显示光标 */
 					} else {
 						key_to = 0;
 						make_wtitle8(buf_win, sht_win->bxsize, "task_a", 1);
 						make_wtitle8(buf_cons, sht_cons->bxsize, "console", 0);
+						cursor_c = COL8_000000;
 					}
 					sheet_refresh(sht_win, 0, 0, sht_win->bxsize, 21);
 					sheet_refresh(sht_cons, 0, 0, sht_cons->bxsize, 21);
@@ -233,7 +235,9 @@ void HariMain(void)
 					io_out8(PORT_KEYDAT, keycmd_wait);
 				}
 				/*重新显示光标*/
-				boxfill8(sht_win->buf, sht_win->bxsize, cursor_c, cursor_x, 28, cursor_x + 7, 43);
+				if (cursor_c >= 0) {
+					boxfill8(sht_win->buf, sht_win->bxsize, cursor_c, cursor_x, 28, cursor_x + 7, 43);
+				}
 				sheet_refresh(sht_win, cursor_x, 28, cursor_x + 8, 44);
 			} else if (512 <= i && i <= 767) { /* 鼠标数据*/
 				if (mouse_decode(&mdec, i - 512) != 0) {
@@ -274,14 +278,20 @@ void HariMain(void)
 			} else if (i <= 1) { /* 光标用定时器*/
 				if (i != 0) {
 					timer_init(timer, &fifo, 0); /* 下面设定0 */
-					cursor_c = COL8_000000;
+					if (cursor_c >= 0) {
+						cursor_c = COL8_000000;
+					}
 				} else {
 					timer_init(timer, &fifo, 1); /* 下面设定1 */
-					cursor_c = COL8_FFFFFF;
+					if (cursor_c >= 0) {
+						cursor_c = COL8_FFFFFF;
+					}
 				}
 				timer_settime(timer, 50);
-				boxfill8(sht_win->buf, sht_win->bxsize, cursor_c, cursor_x, 28, cursor_x + 7, 43);
-				sheet_refresh(sht_win, cursor_x, 28, cursor_x + 8, 44);
+				if (cursor_c >= 0) {
+					boxfill8(sht_win->buf, sht_win->bxsize, cursor_c, cursor_x, 28, cursor_x + 7, 43);
+					sheet_refresh(sht_win, cursor_x, 28, cursor_x + 8, 44);
+				}
 			}
 		}
 	}