diff --git a/6502/C64/Makefile b/6502/C64/Makefile
index 0694782..8217311 100644
--- a/6502/C64/Makefile
+++ b/6502/C64/Makefile
@@ -47,7 +47,7 @@ run-testbase16: emulator/testbase16.T64
 # Targetcompiler targets
 
 cbmfiles/tcbase: emulator/c64-testbase.T64 emulator/build-tcbase.sh \
-    disks/vforth4_2.d64  disks/tc38q.d64 cbmfiles/mk-tcbase.fth
+    disks/tc38q.d64 cbmfiles/tc-base.fth
 	emulator/build-tcbase.sh
 
 cbmfiles/c64-vf-latest: emulator/tcbase.T64 emulator/build-c64forth.sh \
diff --git a/6502/C64/cbmfiles/tcbase b/6502/C64/cbmfiles/tcbase
index 0ff1c57..cdbdb8d 100644
Binary files a/6502/C64/cbmfiles/tcbase and b/6502/C64/cbmfiles/tcbase differ
diff --git a/6502/C64/emulator/build-tcbase.sh b/6502/C64/emulator/build-tcbase.sh
index 01cac95..45bf1a6 100755
--- a/6502/C64/emulator/build-tcbase.sh
+++ b/6502/C64/emulator/build-tcbase.sh
@@ -1,4 +1,7 @@
 #!/bin/bash
+# build script for the resident part of the target compiler running
+# on the C64.
+
 set -e
 
 emulatordir="$(dirname "${BASH_SOURCE[0]}")"
@@ -6,8 +9,8 @@ basedir="$(realpath --relative-to="$PWD" "${emulatordir}/..")"
 
 rm -f "${basedir}/cbmfiles/tcbase"
 
-keybuf="2 drive 4 load\ninclude mk-tcbase.fth\n\
+keybuf="2 drive 4 load\ninclude tc-base.fth\n\
 savesystem tcbase\ndos s0:notdone\n"
 
-DISK9=vforth4_2 DISK10=tc38q "${emulatordir}/run-in-vice.sh" \
+DISK10=tc38q "${emulatordir}/run-in-vice.sh" \
   "c64-testbase" "${keybuf}"
diff --git a/6502/C64/src/mk-tcbase.fth b/6502/C64/src/tc-base.fth
similarity index 56%
rename from 6502/C64/src/mk-tcbase.fth
rename to 6502/C64/src/tc-base.fth
index 54a605f..ba4e7e2 100644
--- a/6502/C64/src/mk-tcbase.fth
+++ b/6502/C64/src/tc-base.fth
@@ -1,5 +1,7 @@
 
-: edit  list ;
+\ loadfile for the resident part of the target compiler.
+
+' list alias edit
 
 : .blk  ( -)
  blk @ ?dup IF  ."  Blk " u. ?cr  THEN ;