From 0c96e1025410a852b3e326d7e7befd9d85a6781c Mon Sep 17 00:00:00 2001
From: Richard Cornwell <rcornwell@github.com>
Date: Sat, 12 Aug 2017 15:51:48 -0400
Subject: [PATCH] SIM_CARD: Fixed bug in handling of binary decks with one
 card.

---
 sim_card.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/sim_card.c b/sim_card.c
index 128cca2..2191637 100644
--- a/sim_card.c
+++ b/sim_card.c
@@ -736,7 +736,7 @@ sim_read_card(UNIT * uptr)
             data->image[col++] |= c;
         }
 
-        if (col >= 80 && (data->cbuff[i] & 0x80) == 0) {
+        if (i < data->len && col >= 80 && (data->cbuff[i] & 0x80) == 0) {
            r = SCPE_IOERR;
         }
         /* Record over length of card, skip until next */
@@ -772,7 +772,7 @@ sim_read_card(UNIT * uptr)
             data->image[col++] = sim_bcd_to_hol(c);
         }
 
-        if (col >= 80 && (data->cbuff[i] & 0x80) == 0) {
+        if (i < data->len && col >= 80 && (data->cbuff[i] & 0x80) == 0) {
            r = SCPE_IOERR;
         }