diff --git a/CPLD/FamicomDumper.v b/CPLD/FamicomDumper.v
index 9807114..fbb98fe 100644
--- a/CPLD/FamicomDumper.v
+++ b/CPLD/FamicomDumper.v
@@ -34,7 +34,7 @@ module FamicomDumper # (
 );
 
 assign romsel = !(m2 && a15 && ne1_active);
-assign cpu_rw = reg_cpu_rw || (coolboy_mode && VERSION_3);
+assign cpu_rw = reg_cpu_rw || (coolboy_mode && !romsel && VERSION_3);
 assign cpu_oe = !cpu_shifter_enabled;
 assign cpu_dir = !reg_cpu_rw;
 assign ppu_rd = !(!ne2 && !noe);