From 9cdba1b6d850c50aee2cb559ccffa3cec3910752 Mon Sep 17 00:00:00 2001
From: John Murkerson <john@zifmia.org>
Date: Wed, 14 May 2025 14:37:51 -0400
Subject: [PATCH] Fix Atari buffer overrun on keyboard EOF

---
 libsrc/atari/read.s | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/libsrc/atari/read.s b/libsrc/atari/read.s
index 228ca9ee2..b50bd2856 100644
--- a/libsrc/atari/read.s
+++ b/libsrc/atari/read.s
@@ -147,6 +147,7 @@ icbll_copy:
         sta     dataptr+1
         lda     ICBLL,x
         sta     copylen
+        beq     copied          ; length = 0 if EOF
         pha                     ; remember for return value
         ldy     #0
         ldx     index
@@ -159,7 +160,7 @@ copy:   lda     linebuf,x
         bne     copy
 
         pla                     ; length
-        pha                     ; save length to return at okdone
+copied: pha                     ; save length to return at okdone
 
         clc
         adc     index