diff --git a/lib/make/天房系統擴展/mb_msxrom.mk b/lib/make/天房系統擴展/mb_msxrom.mk
index 70fc1c1..d066f8a 100644
--- a/lib/make/天房系統擴展/mb_msxrom.mk
+++ b/lib/make/天房系統擴展/mb_msxrom.mk
@@ -259,14 +259,18 @@ $(call mb-make-call,mb-doc-function-deep,mb-msxrom-machine-Panasonic_FS-A1WSX,In
 $(call mb-make-call,_mb-msxrom-grow-fire-machines,Panasonic_FS-A1WSX)
 
 
-define mb-msxrom-machine-Boosted_MSX2_EN
-$(MB_ᕽᕽᕽ　　　)$(call mb-make-call,mb-msxrom-machine-Philips_NMS_8250,$(1))
-$(MB_ᕽᕽᕽ　　　)$(call mb-make-call,mb-msxrom-extension-fmpac,$(1))
-$(MB_ᕽᕽᕽ　　　)$(call mb-make-call,mb-msxrom-extension-moonsound,$(1))
-$(MB_ᕽᕽᕽ　　　)$(call mb-make-call,mb-msxrom-extension-basickun,$(1))
-endef
-$(call mb-make-call,mb-doc-function-deep,mb-msxrom-machine-Boosted_MSX2_EN,Installs machine and extensions roms.,<dir>)
-$(call mb-make-call,_mb-msxrom-grow-fire-machines,Boosted_MSX2_EN)
+# NOTE: openMSX switched from 8250 to 8245 so now we need both, but...
+# see: https://github.com/openMSX/openMSX/commit/504aac4838f62682b5bf9c5d31bf2766123e2f76
+# Checked all "public" fmpac roms for fec451b9256570a0e4869355a40329c57f40705f NONE FOUND
+#define mb-msxrom-machine-Boosted_MSX2_EN
+#$(MB_ᕽᕽᕽ　　　)$(call mb-make-call,mb-msxrom-machine-Philips_NMS_8250,$(1))
+#$(MB_ᕽᕽᕽ　　　)$(call mb-make-call,mb-msxrom-machine-Philips_NMS_8245,$(1))
+#$(MB_ᕽᕽᕽ　　　)$(call mb-make-call,mb-msxrom-extension-fmpac,$(1))
+#$(MB_ᕽᕽᕽ　　　)$(call mb-make-call,mb-msxrom-extension-moonsound,$(1))
+#$(MB_ᕽᕽᕽ　　　)$(call mb-make-call,mb-msxrom-extension-basickun,$(1))
+#endef
+#$(call mb-make-call,mb-doc-function-deep,mb-msxrom-machine-Boosted_MSX2_EN,Installs machine and extensions roms.,<dir>)
+#$(call mb-make-call,_mb-msxrom-grow-fire-machines,Boosted_MSX2_EN)
 
 
 define mb-msxrom-machine-Boosted_MSX2+_JP