From 0c5e15b49dd8a8167dffc11a2fadecc74464bd33 Mon Sep 17 00:00:00 2001
From: Lior Halphon <LIJI32@gmail.com>
Date: Sun, 11 Apr 2021 02:38:58 +0300
Subject: [PATCH] Correct emulation of count overflow in ATTR_CHR, fixes #372

---
 Core/sgb.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Core/sgb.c b/Core/sgb.c
index c77b0db6..f22eb3e5 100644
--- a/Core/sgb.c
+++ b/Core/sgb.c
@@ -269,7 +269,8 @@ static void command_ready(GB_gameboy_t *gb)
 #endif
             uint8_t x = command->x;
             uint8_t y = command->y;
-            if (x >= 20 || y >= 18 || (count + 3) / 4 > sizeof(gb->sgb->command) - sizeof(*command) - 1) {
+            count = MIN(count, 20 * 18);
+            if (x >= 20 || y >= 18) {
                 /* TODO: Verify with the SFC BIOS */
                 break;
             }