From 381aab33d76af4f964b2a1536f75b4d611a9ec89 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Juhani=20Krekel=C3=A4?= <juhani@krekelä.fi>
Date: Fri, 11 Mar 2022 18:56:01 +0200
Subject: [PATCH] Add keyboard checking

---
 dosclock.asm | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/dosclock.asm b/dosclock.asm
index 9ca43ae..1d0d8cb 100644
--- a/dosclock.asm
+++ b/dosclock.asm
@@ -20,6 +20,20 @@ setup:
 	mov es, ax
 
 mainloop:
+	; Check keyboard
+	mov ah, 6
+	mov dl, 0xff
+	int 0x21
+	jz .no_key
+
+	.key:
+		cmp al, 'q'
+		je exit
+		cmp al, 27
+		je exit
+
+	.no_key:
+	; Check time
 	mov ah, 0x2c
 	int 0x21
 	cmp ch, [hour]