diff --git a/map65/libm65/read_tf2.f90 b/map65/libm65/read_tf2.f90
new file mode 100644
index 000000000..cb6c5b1b5
--- /dev/null
+++ b/map65/libm65/read_tf2.f90
@@ -0,0 +1,33 @@
+subroutine read_tf2(k)
+
+  parameter (NFFT=32768)
+  integer*8 ms                              !ms since epoch
+  integer k                                 !data sample pointer
+  integer*2 id2(4,174)
+  logical lopen
+  real*8 fcenter
+  common/datcom/dd(4,5760000),ss(4,322,NFFT),savg(4,NFFT),fcenter,nutc,junk(38)
+  data lopen/.false./
+  save lopen
+
+  if(k.eq.0) then
+     inquire(27,opened=lopen)
+     if(lopen) then
+        rewind 27
+     else
+        open(27,file='000000_0000.tf2',status='old',access='stream')
+     endif
+     read(27) fcenter
+  endif
+  
+  read(27,end=999) id2
+  do i=1,174
+     k=k+1
+     dd(1,k)=id2(1,i)
+     dd(2,k)=id2(2,i)
+     dd(3,k)=id2(3,i)
+     dd(4,k)=id2(4,i)
+  enddo
+
+999 return
+end subroutine read_tf2