From 86bfd0331d842c7210a3a4758b71231b18193b5b Mon Sep 17 00:00:00 2001
From: aiju <devnull@localhost>
Date: Wed, 1 Apr 2015 12:49:59 +0200
Subject: games/c64: writes to I/O area do not affect underlying memory
 (documentation lied)

---
 sys/src/games/c64/mem.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/sys/src/games/c64/mem.c b/sys/src/games/c64/mem.c
index 1b13f2465..5245a55e9 100644
--- a/sys/src/games/c64/mem.c
+++ b/sys/src/games/c64/mem.c
@@ -280,8 +280,11 @@ memread(u16int a)
 void
 memwrite(u16int a, u8int v)
 {
-	if(a >> 12 == 13 && !((pla & (HIRAM|LORAM)) == 0 || pla == 1 || (pla & CHAREN) == 0 && (pla & (EXROM|GAME)) != EXROM))
+	if(a >> 12 == 13 && !((pla & (HIRAM|LORAM)) == 0 || pla == 1 || (pla & CHAREN) == 0 && (pla & (EXROM|GAME)) != EXROM)){
 		miowrite(a & 0xfff, v);
+		io();
+		return;
+	}
 	ram[a] = v;
 	if(a == 1)
 		pla = pla & ~7 | v & 7;
-- 
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