diff --git a/6502/C64/Makefile b/6502/C64/Makefile
index dc390fe..565c1cf 100644
--- a/6502/C64/Makefile
+++ b/6502/C64/Makefile
@@ -6,14 +6,32 @@
 vf_blk_d64_files = $(wildcard disks/*.d64)
 vf_blk_fth_files = $(patsubst %.d64, %.fth, $(vf_blk_d64_files))
 
+
+# Target to convert all .d64 images into .fth files for easier reading.
 vf_blk_fth: $(vf_blk_fth_files)
 
+
+# Convenience targets
+
+run-devenv: emulator/devenv.T64
+	emulator/run-in-vice.sh devenv
+
+
+# Rules for building Forth binaries on top of the plain vanilla
+# c64-volksforth83.
+
+cbmfiles/devenv: emulator/run-in-vice.sh emulator/build-devenv.sh \
+    emulator/c64-volksforth83.T64
+	emulator/build-devenv.sh
+
+
 # Generic T64 tape image rule
 
 emulator/%.T64: cbmfiles/%
 	bin2t64 $< $@
 
-# Generic rule for visualizing .d64 blk sources
+
+# Generic rule for converting .d64 blk sources into .fth files.
 
 disks/%.fth: disks/%.d64
 	ufscr2file $< $@
diff --git a/6502/C64/emulator/build-devenv.sh b/6502/C64/emulator/build-devenv.sh
index 2c237f9..9e56129 100755
--- a/6502/C64/emulator/build-devenv.sh
+++ b/6502/C64/emulator/build-devenv.sh
@@ -4,14 +4,13 @@ set -e
 emulatordir="$(dirname "${BASH_SOURCE[0]}")"
 basedir="$(realpath --relative-to="$PWD" "${emulatordir}/..")"
 
-cd "${basedir}"
+rm -f "${basedir}/cbmfiles/devenv"
 
-make emulator/c64-volksforth83.T64
-
-rm -f cbmfiles/devenv
-
-keybuf="2 drive 19 load\n1 drive 26 load\nsavesystem devenv\n"
+# load editor from vforth4_3.d64 block 19 in drive 10.
+# load savesystem from vforth4_1.d64 block 26 in drive 9.
+# load include and dos from file-words.d64 block 10 in drive 11.
+# savesystem and then scratch file notdone to exit emulator.
+keybuf="2 drive 19 load\n1 drive 26 load\n3 drive 10 load\n\
+savesystem devenv\ndos s0:notdone\n"
 
 "${emulatordir}/run-in-vice.sh" "c64-volksforth83" "${keybuf}"
-
-make emulator/devenv.T64