diff --git a/bin/basic_generic.rom b/bin/basic_generic.rom
index 82c768bf..51ee2980 100644
Binary files a/bin/basic_generic.rom and b/bin/basic_generic.rom differ
diff --git a/bin/basic_mega65.rom b/bin/basic_mega65.rom
index 911bacab..84c54593 100644
Binary files a/bin/basic_mega65.rom and b/bin/basic_mega65.rom differ
diff --git a/bin/basic_ultimate64.rom b/bin/basic_ultimate64.rom
index e54c732f..5df8a636 100644
Binary files a/bin/basic_ultimate64.rom and b/bin/basic_ultimate64.rom differ
diff --git a/bin/kernal_generic.rom b/bin/kernal_generic.rom
index 2cbd041a..3d37f906 100644
Binary files a/bin/kernal_generic.rom and b/bin/kernal_generic.rom differ
diff --git a/bin/kernal_mega65.rom b/bin/kernal_mega65.rom
index 2cbd041a..3d37f906 100644
Binary files a/bin/kernal_mega65.rom and b/bin/kernal_mega65.rom differ
diff --git a/bin/kernal_ultimate64.rom b/bin/kernal_ultimate64.rom
index 2cbd041a..3d37f906 100644
Binary files a/bin/kernal_ultimate64.rom and b/bin/kernal_ultimate64.rom differ
diff --git a/c64/kernal/cint.s b/c64/kernal/cint_real.s
similarity index 99%
rename from c64/kernal/cint.s
rename to c64/kernal/cint_real.s
index a99aa08d..50e1d689 100644
--- a/c64/kernal/cint.s
+++ b/c64/kernal/cint_real.s
@@ -9,7 +9,7 @@
 ;;
 
 
-cint:
+cint_real:
 
 	;; According to [CM64], this routine checks for PAL/NTSC. It's definitely not done
 	;; within the 'BRK' part, this can be easily checked - POKE something
diff --git a/c64/kernal/fd15.interop b/c64/kernal/fd15.interop
new file mode 100644
index 00000000..1436a2f0
--- /dev/null
+++ b/c64/kernal/fd15.interop
@@ -0,0 +1,4 @@
+Original Kernal location of the RESTOR routine.
+
+Routine moved to original location due to game 'Duotris' calling it instead of using the Kernal jumptable.
+Starting the game without this patch caused warm reset with 'BRK AT $FD15' message.
diff --git a/c64/kernal/vector.s b/c64/kernal/fd15.vector.s
similarity index 100%
rename from c64/kernal/vector.s
rename to c64/kernal/fd15.vector.s
diff --git a/c64/kernal/ff5b.cint.jmp.s b/c64/kernal/ff5b.cint.jmp.s
new file mode 100644
index 00000000..b5497eca
--- /dev/null
+++ b/c64/kernal/ff5b.cint.jmp.s
@@ -0,0 +1,6 @@
+
+;; Our implementation is longer than the original one,
+;; placing it here would cause a collision with OPEN
+
+cint:
+    jmp cint_real
diff --git a/c64/kernal/ff5b.interop b/c64/kernal/ff5b.interop
new file mode 100644
index 00000000..d5ca7abe
--- /dev/null
+++ b/c64/kernal/ff5b.interop
@@ -0,0 +1,4 @@
+Original Kernal location of the CINT routine.
+
+Routine moved to original location due to game 'Duotris' calling it instead of using the Kernal jumptable.
+Starting the game without this patch caused warm reset with 'BRK AT $FF5B' message.