diff --git a/07_day/int.c b/07_day/int.c
index ad7176e..708d97d 100644
--- a/07_day/int.c
+++ b/07_day/int.c
@@ -28,11 +28,15 @@ void inthandler21(int *esp)
 /* 来自PS/2键盘的中断 */
 {
 	struct BOOTINFO *binfo = (struct BOOTINFO *) ADR_BOOTINFO;
-	boxfill8(binfo->vram, binfo->scrnx, COL8_000000, 0, 0, 32 * 8 - 1, 15);
-	putfonts8_asc(binfo->vram, binfo->scrnx, 0, 0, COL8_FFFFFF, "INT 21 (IRQ-1) : PS/2 keyboard");
-	for (;;) {
-		io_hlt();
-	}
+	unsigned char data, s[4];
+	io_out8(PIC0_OCW2, 0x61);	/* IRQ-01受付完了をPICに通知 */
+	data = io_in8(PORT_KEYDAT);
+
+	sprintf(s, "%02X", data);
+	boxfill8(binfo->vram, binfo->scrnx, COL8_008484, 0, 16, 15, 31);
+	putfonts8_asc(binfo->vram, binfo->scrnx, 0, 16, COL8_FFFFFF, s);
+
+	return;
 }
 
 void inthandler2c(int *esp)