From 50b5122969fafda3c2be42f1d562d99705ba4a38 Mon Sep 17 00:00:00 2001
From: Thomas Harte <thomas.harte@gmail.com>
Date: Fri, 13 Jan 2023 14:18:39 -0500
Subject: [PATCH] For an MSX 2, the extension ROM is obligatory.

---
 Machines/MSX/MSX.cpp     | 2 +-
 ROMImages/MSX/readme.txt | 1 +
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/Machines/MSX/MSX.cpp b/Machines/MSX/MSX.cpp
index 9b5c4b363..43e910c8b 100644
--- a/Machines/MSX/MSX.cpp
+++ b/Machines/MSX/MSX.cpp
@@ -180,7 +180,7 @@ class ConcreteMachine:
 
 			ROM::Request bios_request = ROM::Request(bios_name);
 			if constexpr (model == Target::Model::MSX2) {
-				bios_request = bios_request || ROM::Request(ROM::Name::MSX2Extension);
+				bios_request = bios_request && ROM::Request(ROM::Name::MSX2Extension);
 			}
 
 			bool is_ntsc = true;
diff --git a/ROMImages/MSX/readme.txt b/ROMImages/MSX/readme.txt
index da327ecbb..b30d35fde 100644
--- a/ROMImages/MSX/readme.txt
+++ b/ROMImages/MSX/readme.txt
@@ -4,6 +4,7 @@ Minimum expected files:
 
 msx.rom
 msx2.rom
+msx2ext.rom
 disk.rom
 
 These names match those offered for download at http://fms.komkon.org/fMSX/ (albeit in lowercase), and the emulator has been tested against those images.