diff --git a/6502/C64/Makefile b/6502/C64/Makefile
index 7f71ff8..a795e13 100644
--- a/6502/C64/Makefile
+++ b/6502/C64/Makefile
@@ -34,7 +34,7 @@ clean:
 
 binaries: $(vf_binaries)
 
-test: $(test_resuls) test-v4th-x16-39.result
+test: $(test_resuls)
 
 test64: std64 blk64
 
@@ -93,66 +93,79 @@ cbmfiles/v4th-x16:
 
 $(test_logs): $(test_files_petscii) emulator/run-in-vice.sh
 
-test-v4thblk-c64.log: emulator/v4thblk-c64.T64 disks/scratch.d64
-	rm -f cbmfiles/test.log
+test-v4thblk-c64.log: emulator/v4thblk-c64.T64 disks/empty.d64
+	rm -f cbmfiles/test.log disks/scratch.d64
+	cp disks/empty.d64 disks/scratch.d64
 	DISK9=scratch emulator/run-in-vice.sh v4thblk-c64 \
-	  "include run-blk-tests.fth\n1234567890\n"
+	  "include run-blk-tests.fth\n1234567890"
 	petscii2ascii cbmfiles/test.log $@
 
 test-v4th-c64.log: emulator/v4th-c64.T64
 	rm -f cbmfiles/test.log
 	emulator/run-in-vice.sh v4th-c64 \
-	  "include run-std-tests.fth\n1234567890\n"
+	  "include run-std-tests.fth\n1234567890"
 	petscii2ascii cbmfiles/test.log $@
 
-test-v4thblk-c16+.log: emulator/v4thblk-c16+.T64 disks/scratch.d64
-	rm -f cbmfiles/test.log
-	VICE=xplus4 emulator/run-in-vice.sh v4thblk-c16+ \
-	  "include run-blk-tests.fth\n1234567890\n"
+test-v4thblk-c16+.log: emulator/v4thblk-c16+.T64 disks/empty.d64
+	rm -f cbmfiles/test.log disks/scratch.d64
+	cp disks/empty.d64 disks/scratch.d64
+	VICE=xplus4 DISK9=scratch emulator/run-in-vice.sh v4thblk-c16+ \
+	  "include run-blk-tests.fth\n1234567890"
 	petscii2ascii cbmfiles/test.log $@
 
 test-v4th-c16+.log: emulator/v4th-c16+.T64
 	rm -f cbmfiles/test.log
 	VICE=xplus4 emulator/run-in-vice.sh v4th-c16+ \
-	  "include run-std-tests.fth\n1234567890\n"
+	  "include run-std-tests.fth\n1234567890"
 	petscii2ascii cbmfiles/test.log $@
 
 test-v4thblk-c16-.log: emulator/v4thblk-c16-.T64
 	rm -f cbmfiles/test.log
 	VICE=xplus4 emulator/run-in-vice.sh v4thblk-c16- \
-	  "include run-min-tests.fth\n1234567890\n"
+	  "include run-min-tests.fth\n1234567890"
 	petscii2ascii cbmfiles/test.log $@
 
 test-v4th-c16-.log: emulator/v4th-c16-.T64
 	rm -f cbmfiles/test.log
 	VICE=xplus4 emulator/run-in-vice.sh v4th-c16- \
-	  "include run-std-tests.fth\n1234567890\n"
+	  "include run-std-tests.fth\n1234567890"
 	petscii2ascii cbmfiles/test.log $@
 
 test-v4th-x16.log: cbmfiles/v4th-x16 emulator/sdcard.img
 	rm -f cbmfiles/test.log
 	emulator/run-in-x16emu.sh v4th-x16 \
-	  "include run-std-tests.fth\n1234567890\n"
+	  "include run-std-tests.fth\n1234567890"
 	mcopy -i emulator/sdcard.img ::TEST.LOG cbmfiles/test.log
 	petscii2ascii cbmfiles/test.log $@
 
+test-v4th-x16-39.log: $(test_files_petscii) emulator/run-in-vice.sh
+
 test-v4th-x16-39.log: cbmfiles/v4th-x16 emulator/sdcard.img
 	rm -f cbmfiles/test.log
 	emulator/run-in-x16-39.sh v4th-x16 \
-	  "include run-std-tests.fth\n1234567890\n"
+	  "include run-std-tests.fth\n1234567890"
 	mcopy -i emulator/sdcard.img ::TEST.LOG cbmfiles/test.log
 	petscii2ascii cbmfiles/test.log $@
 
 test-v4th-x16-39.golden: test-v4th-x16.golden
 	cp $< $@
 
+test-v4th-x16-41.log: $(test_files_petscii) emulator/run-in-vice.sh
+
+test-v4th-x16-41.log: cbmfiles/v4th-x16 emulator/sdcard.img
+	rm -f cbmfiles/test.log
+	emulator/run-in-x16-41.sh v4th-x16 \
+	  "include run-std-tests.fth\n1234567890"
+	mcopy -i emulator/sdcard.img ::TEST.LOG cbmfiles/test.log
+	petscii2ascii cbmfiles/test.log $@
+
+test-v4th-x16-41.golden: test-v4th-x16.golden
+	cp $< $@
+
 test-%.result: test-%.log test-%.golden tests/evaluate-test.sh
 	rm -f $@
 	tests/evaluate-test.sh $(basename $@)
 
-disks/scratch.d64: disks/empty.d64
-	cp $< $@
-
 emulator/sdcard.img: emulator/sdcard.sfdisk
 	rm -f $@ $@.tmp
 	dd if=/dev/zero of=$@.tmp count=64 bs=1M
diff --git a/6502/C64/cbmfiles/v4th-c16+ b/6502/C64/cbmfiles/v4th-c16+
index 899c199..1bfb30e 100644
Binary files a/6502/C64/cbmfiles/v4th-c16+ and b/6502/C64/cbmfiles/v4th-c16+ differ
diff --git a/6502/C64/cbmfiles/v4th-c16- b/6502/C64/cbmfiles/v4th-c16-
index 3f1e332..a2a959f 100644
Binary files a/6502/C64/cbmfiles/v4th-c16- and b/6502/C64/cbmfiles/v4th-c16- differ
diff --git a/6502/C64/cbmfiles/v4th-c64 b/6502/C64/cbmfiles/v4th-c64
index 04c7397..53df832 100644
Binary files a/6502/C64/cbmfiles/v4th-c64 and b/6502/C64/cbmfiles/v4th-c64 differ
diff --git a/6502/C64/cbmfiles/v4th-x16 b/6502/C64/cbmfiles/v4th-x16
index ee12471..9e36648 100644
Binary files a/6502/C64/cbmfiles/v4th-x16 and b/6502/C64/cbmfiles/v4th-x16 differ
diff --git a/6502/C64/cbmfiles/v4thblk-c16+ b/6502/C64/cbmfiles/v4thblk-c16+
index 9502879..a8e27c4 100644
Binary files a/6502/C64/cbmfiles/v4thblk-c16+ and b/6502/C64/cbmfiles/v4thblk-c16+ differ
diff --git a/6502/C64/cbmfiles/v4thblk-c16- b/6502/C64/cbmfiles/v4thblk-c16-
index e1eab28..1c3fd42 100644
Binary files a/6502/C64/cbmfiles/v4thblk-c16- and b/6502/C64/cbmfiles/v4thblk-c16- differ
diff --git a/6502/C64/cbmfiles/v4thblk-c64 b/6502/C64/cbmfiles/v4thblk-c64
index 20a14e7..2a7cb92 100644
Binary files a/6502/C64/cbmfiles/v4thblk-c64 and b/6502/C64/cbmfiles/v4thblk-c64 differ
diff --git a/6502/C64/emulator/build-devenv.sh b/6502/C64/emulator/build-devenv.sh
index cd034ab..8ef1831 100755
--- a/6502/C64/emulator/build-devenv.sh
+++ b/6502/C64/emulator/build-devenv.sh
@@ -11,7 +11,7 @@ rm -f "${basedir}/cbmfiles/devenv"
 # 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\n47 load\n1 drive 26 load\n3 drive 10 load\n\
-savesystem devenv\ndos s0:notdone\n"
+savesystem devenv\ndos s0:notdone"
 
 DISK9=vforth4_1 DISK10=vforth4_3 DISK11=file-words \
   "${emulatordir}/run-in-vice.sh" "c64-volksforth83" "${keybuf}"
diff --git a/6502/C64/emulator/build-tcbase.sh b/6502/C64/emulator/build-tcbase.sh
index 3e65753..3e4814b 100755
--- a/6502/C64/emulator/build-tcbase.sh
+++ b/6502/C64/emulator/build-tcbase.sh
@@ -11,7 +11,7 @@ rm -f "${basedir}/cbmfiles/tcbase"
 
 keybuf="3 drive 20 load\n3 drive 10 load\nsave\n\
 2 drive 4 load\ninclude tc-base.fth\n\
-savesystem tcbase\ndos s0:notdone\n"
+savesystem tcbase\ndos s0:notdone"
 
 DISK10=tc38q DISK11=file-words "${emulatordir}/run-in-vice.sh" \
   "v4th-c64-4tc" "${keybuf}"
diff --git a/6502/C64/emulator/build-testbase.sh b/6502/C64/emulator/build-testbase.sh
index 7e5c59e..002318a 100755
--- a/6502/C64/emulator/build-testbase.sh
+++ b/6502/C64/emulator/build-testbase.sh
@@ -15,7 +15,7 @@ rm -f "${basedir}/cbmfiles/${target}"
 # load include and dos from file-words.d64 block 10.
 # savesystem and then scratch file notdone to exit emulator.
 keybuf="3 drive 20 load\n3 drive 10 load\n\
-savesystem ${target}\ndos s0:notdone\n"
+savesystem ${target}\ndos s0:notdone"
 
 DISK11=file-words "${emulatordir}/run-in-vice.sh" \
   "${source}" "${keybuf}"
diff --git a/6502/C64/emulator/build-vf.sh b/6502/C64/emulator/build-vf.sh
index f7fed6c..3f29a5f 100755
--- a/6502/C64/emulator/build-vf.sh
+++ b/6502/C64/emulator/build-vf.sh
@@ -18,7 +18,7 @@ nosave="${2}"
 test -z "${nosave}" && rm -f "${basedir}/cbmfiles/${target}"
 rm -f "${basedir}/cbmfiles/${logfile}"
 
-keybuf="include ${source}\nsave-target ${target}\ndos s0:notdone\n"
+keybuf="include ${source}\nsave-target ${target}\ndos s0:notdone"
 test -n "${nosave}" && keybuf="include ${source}\n"
 
 DISK10=tc38q "${emulatordir}/run-in-vice.sh" \
diff --git a/6502/C64/emulator/run-in-vice.sh b/6502/C64/emulator/run-in-vice.sh
index 683ce36..77febe7 100755
--- a/6502/C64/emulator/run-in-vice.sh
+++ b/6502/C64/emulator/run-in-vice.sh
@@ -8,20 +8,26 @@ test -n "$DISK11" || DISK11=empty
 emulatordir="$(realpath --relative-to="$PWD" "$(dirname "${BASH_SOURCE[0]}")")"
 basedir="$(realpath --relative-to="$PWD" "${emulatordir}/..")"
 
+executable="${1}"
+keybuf="${2}"
+
 autostart=""
-if [ -n "$1" ]
+if [ -n "${executable}" ]
 then
-  autostart="-autostart ${emulatordir}/${1}.T64"
+  autostart="-autostart ${emulatordir}/${executable}.T64"
 fi
 
-keybuf=""
 warp=""
-if [ -n "$2" ]
+if [ -n "${keybuf}" ]
 then
-  keybuf="${2}"
+  # keybuf="${2}"
   # The following could also just be a cp.
   ascii2petscii "${emulatordir}/notdone" "${basedir}/cbmfiles/notdone"
   warp="-warp"
+  # Magic env variable KEEPEMU: Only if not set, send in the final CR.
+  if [ -z "${KEEPEMU}" ]; then
+    keybuf="${keybuf}\n"
+  fi
 fi
 
 "$VICE" \
diff --git a/6502/C64/emulator/run-in-x16-41.sh b/6502/C64/emulator/run-in-x16-41.sh
new file mode 100755
index 0000000..89487d4
--- /dev/null
+++ b/6502/C64/emulator/run-in-x16-41.sh
@@ -0,0 +1,9 @@
+#!/bin/bash
+
+set -e
+
+emulatordir="$(realpath --relative-to="$PWD" "$(dirname "${BASH_SOURCE[0]}")")"
+
+export PATH="${HOME}/x16-r41:${PATH}"
+echo "PATH = ${PATH}"
+"${emulatordir}/run-in-x16emu.sh" "$@"
diff --git a/6502/C64/emulator/run-in-x16emu.sh b/6502/C64/emulator/run-in-x16emu.sh
index ab94f63..ea7f15d 100755
--- a/6502/C64/emulator/run-in-x16emu.sh
+++ b/6502/C64/emulator/run-in-x16emu.sh
@@ -1,6 +1,9 @@
 #!/bin/bash
 set -e
 
+executable="${1}"
+keybuf="${2}"
+
 emulatordir="$(realpath --relative-to="$PWD" "$(dirname "${BASH_SOURCE[0]}")")"
 basedir="$(realpath --relative-to="$PWD" "${emulatordir}/..")"
 cbmfilesdir="${basedir}/cbmfiles"
@@ -16,20 +19,27 @@ do
 done
 
 autostart=""
-if [ -n "$1" ]
+if [ -n "${executable}" ]
 then
-  autostart="-prg ${cbmfilesdir}/${1} -run"
+  autostart="-prg ${cbmfilesdir}/${executable} -run"
 fi
 
 script=""
 warp=""
 scale=""
 debug=""
-if [ -n "$2" ]
+if [ -n "${keybuf}" ]
 then
   test -d tmp || mkdir tmp
   rm -f "${x16script}".*
-  echo "load\"${1}\"\nrun\n${2}" | sed 's/\\n/\n/g' > "${x16script}".ascii
+  # Magic env variable KEEPEMU: If set, remove the final CR.
+  if [ -n "${KEEPEMU}" ]; then
+    tr_remove='\n'
+  else
+    tr_remove=''
+  fi
+  echo "load\"${executable}\"\nrun\n${keybuf}" | tr -d "${tr_remove}" \
+      | sed 's/\\n/\n/g' > "${x16script}".ascii
   ascii2petscii "${x16script}.ascii" "${x16script}.petscii"
   script="-bas ${x16script}.petscii"
   autostart=""
diff --git a/6502/C64/src/vf-cbm-file.fth b/6502/C64/src/vf-cbm-file.fth
index 4d8bfff..3a4ab7b 100644
--- a/6502/C64/src/vf-cbm-file.fth
+++ b/6502/C64/src/vf-cbm-file.fth
@@ -21,10 +21,14 @@
    dup 0= swap #cr = or IF 0 exit THEN
    i/o-status? IF 1 exit THEN  -1 ;
 
+| : i/o-status?abort  i/o-status? 3 and IF c64cr
+   fload-dev @ dos-error abort THEN ;
+
 | : freadline ( -- eof )
  fload-dev @ fload-2nd @ busin
+ i/o-status?abort
  tib /tib bounds
- DO bus@ dup eolf? under
+ DO bus@ i/o-status?abort dup eolf? under
      IF I c! ELSE drop THEN
  dup 0<
    IF drop ELSE I + tib - #tib ! UNLOOP
@@ -38,9 +42,6 @@
 
 \   fload-open  fload-close    30jun20pz
 
-| : i/o-status?abort  i/o-status? IF cr
-   fload-dev @ dos-error abort THEN ;
-
   defer on-fload  ' noop is on-fload
 | : fload-open ( addr c -- )
  on-fload  fload-dev @
diff --git a/6502/C64/src/vf-head-c16.fth b/6502/C64/src/vf-head-c16.fth
index 2a0927b..012ecb2 100644
--- a/6502/C64/src/vf-head-c16.fth
+++ b/6502/C64/src/vf-head-c16.fth
@@ -28,5 +28,5 @@ here dup origin!
 $100 allot
 
 Create logo
- (C16+ ," volksFORTH-83 3.9.3-C16+ " )
- (C16- ," volksFORTH-83 3.9.3-C16- " )
+ (C16+ ," volksFORTH-83 3.9.4-C16+ " )
+ (C16- ," volksFORTH-83 3.9.4-C16- " )
diff --git a/6502/C64/src/vf-head-c64.fth b/6502/C64/src/vf-head-c64.fth
index 83b23d9..7e4d7f0 100644
--- a/6502/C64/src/vf-head-c64.fth
+++ b/6502/C64/src/vf-head-c64.fth
@@ -28,4 +28,4 @@ here dup origin!
 $100 allot
 
 Create logo
-  ," volksFORTH-83 3.9.3-C64  "
+  ," volksFORTH-83 3.9.4-C64  "
diff --git a/6502/C64/src/vf-head-x16.fth b/6502/C64/src/vf-head-x16.fth
index 4d411d6..4671b87 100644
--- a/6502/C64/src/vf-head-x16.fth
+++ b/6502/C64/src/vf-head-x16.fth
@@ -27,4 +27,4 @@ here dup origin!
 $100 allot
 
 Create logo
-  ," volksFORTH-83 3.9.3-X16  "
+  ," volksFORTH-83 3.9.4-X16  "
diff --git a/6502/C64/src/vf-lbls-cbm.fth b/6502/C64/src/vf-lbls-cbm.fth
index d1a5480..1a2b77d 100644
--- a/6502/C64/src/vf-lbls-cbm.fth
+++ b/6502/C64/src/vf-lbls-cbm.fth
@@ -18,6 +18,7 @@ $FF84 >label IOINIT
 $FFB1 >label LISTEN
 $FFC0 >label OPEN
 $FFF0 >label PLOT
+$FFB7 >label READST
 $FF8A >label RESTOR
 $FF93 >label SECOND
 $FFE1 >label STOP
diff --git a/6502/C64/src/vf-sys-c16.fth b/6502/C64/src/vf-sys-c16.fth
index 3dd8d44..31c6b44 100644
--- a/6502/C64/src/vf-sys-c16.fth
+++ b/6502/C64/src/vf-sys-c16.fth
@@ -9,13 +9,10 @@ include vf-lbls-cbm.fth
 0ff4c >label ConOut
   090 >label IOStatus
   09a >label MsgFlg
-  099 >label OutDev
-  098 >label  InDev
+  0ae >label CurDev
 0ff19 >label BrdCol
 0ff15 >label BkgCol
  053b >label PenCol
-  09d >label PrgEnd  \ aka eal; seems unused
-  0b2 >label IOBeg   \ aka stal; seems unused
   0cb >label CurFlg
   0cf >label InsCnt
  0540 >label KeyRep
diff --git a/6502/C64/src/vf-sys-c64.fth b/6502/C64/src/vf-sys-c64.fth
index 9eb05de..707573a 100644
--- a/6502/C64/src/vf-sys-c64.fth
+++ b/6502/C64/src/vf-sys-c64.fth
@@ -9,13 +9,9 @@ include vf-lbls-cbm.fth
 0E716 >label ConOut
   090 >label IOStatus
   09d >label MsgFlg
-  09a >label OutDev
-  099 >label  InDev
 0d020 >label BrdCol
 0d021 >label BkgCol
  0286 >label PenCol
-  0ae >label PrgEnd  \ aka eal; seems unused
-  0c1 >label IOBeg   \ aka stal; seems unused
   0d4 >label CurFlg
   0d8 >label InsCnt
  028a >label KeyRep
diff --git a/6502/C64/src/vf-sys-cbm.fth b/6502/C64/src/vf-sys-cbm.fth
index 260a63e..0b21057 100644
--- a/6502/C64/src/vf-sys-cbm.fth
+++ b/6502/C64/src/vf-sys-cbm.fth
@@ -100,7 +100,7 @@ Output: display   [ here output ! ]
 87 fthpage
 
 Code i/o-status?  ( -- n )
-  IOStatus lda  Push0A jmp  end-code
+  READST jsr  Push0A jmp  end-code
 
 \ b/blk drive >drive drvinit  clv14:2x87
 
@@ -131,7 +131,12 @@ Variable (drv    0 (drv !
 
 Variable i/o  0 i/o !  \ Semaphore
 
-Code busoff  ( --)   CLRCHN jsr
+Label LsnDev 0 c,
+Label TlkDev 0 c,
+
+Code busoff  ( --)
+ LsnDev lda  0<> ?[ LsnDev stx  UNLSN jsr ]?
+ TlkDev lda  0<> ?[ TlkDev stx  UNTLK jsr ]?
 Label unlocki/o  1 # ldy  0 # ldx
  ;c:  i/o unlock ;
 
@@ -146,10 +151,14 @@ Label nodevice     0 # ldx  1 # ldy
 \ ?device                     clv12jul87
 
 Label (?dev
- IOStatus stx (C16 $ae sta ( ) LISTEN jsr
-        \ because of error in OS
+ IOStatus stx  \ because IOStatus isn't cleared by LISTEN or TALK
+ \ It's unclear in which situation or use case the following
+ \ workaround for a C16 OS error is needed. The v4th tests pass
+ \ even with the following line removed.
+ (C16 CurDev sta ( )  \ current device number - because of error in OS
+ LISTEN jsr
  60 # lda  SECOND jsr  UNLSN jsr
- IOStatus lda  0<> ?[ pla pla nodevice jmp ]?
+ READST jsr  0<> ?[ pla pla nodevice jmp ]?
  rts    end-code
 
  Code (?device  ( dev --)
@@ -164,7 +173,7 @@ Label (?dev
  N 2+ lda  (?dev jsr
  N 2+ lda  LISTEN jsr
  N lda  60 # ora SECOND jsr
- N 2+ ldx  OutDev stx
+ N 2+ ldx  LsnDev stx
  xyNext jmp  end-code
 
 
@@ -188,8 +197,7 @@ Label (?dev
  N 2+ lda  TALK jsr
  N lda  60 # ora (C16 $ad sta ( )
  TKSA jsr
-\ because of error in old C16 OS
- N 2+ ldx  InDev stx
+ N 2+ ldx  TlkDev stx
  xyNext jmp end-code
 
 : busin  ( dev 2nd -- )
diff --git a/6502/C64/src/vf-sys-x16.fth b/6502/C64/src/vf-sys-x16.fth
index 084887c..e6d9244 100644
--- a/6502/C64/src/vf-sys-x16.fth
+++ b/6502/C64/src/vf-sys-x16.fth
@@ -6,27 +6,18 @@ include vf-lbls-cbm.fth
 \ X16 labels
 
 0ffd2 >label ConOut
- 0286 >label IOStatus
+0febd >label KbdbufPeek
+ 0289 >label IOStatus
  028c >label MsgFlg
- 028b >label OutDev
- 028a >label  InDev
 09f2c >label BrdCol
  0266 >label BkgCol
  0284 >label PenCol
-   8a >label PrgEnd  \ aka eal; seems unused
- 0292 >label IOBeg   \ aka stal; seems unused
  0381 >label CurFlg  \ aka qtsw
  0385 >label InsCnt  \ aka insrt
 
-\ TODO(issues/33): Remove the R?mBank38 labels.
-09f60 >label RomBank38
-09f61 >label RamBank38
 1 >label RomBank
 0 >label RamBank
 
-0a000 >label KeyD  \ keyboard buffer
-0a00a >label Ndx   \ #keys in keyboard buffer
-
   037B >label blnsw  \ C64: $cc
 \   037C >label blnct  \ C64: $cd
 \   037D >label gdbln  \ C64: $ce
@@ -46,33 +37,12 @@ include vf-lbls-cbm.fth
 \ X16 c64key? getkey
 
 Code c64key? ( -- flag)
- RamBank ldx
-\ TODO(issues/33): Remove the lines accessing RamBank38.
- RamBank38 ldy
- 0 # lda  RamBank sta
- RamBank38 sta
- Ndx lda
- 0<> ?[  0FF # lda  ]? pha
- RamBank stx
- RamBank38 sty
+ KbdbufPeek jsr
+ txa  pha
  Push jmp  end-code
 
 Code getkey  ( -- 8b)
- RamBank lda  N sta
-\ TODO(issues/33): Remove the lines accessing RamBank38.
- RamBank38 lda  N 1+ sta
- 0 # lda  RamBank sta
- RamBank38 sta
- Ndx lda  0<>
- ?[  sei  KeyD ldy
-  [[  KeyD 1+ ,X lda  KeyD ,X sta  inx
-      Ndx cpx  0= ?]
-  Ndx dec
-  N lda  RamBank sta
-  N 1+ lda  RamBank38 sta
-  tya  cli  0A0 # cmp
-  0= ?[  bl # lda  ]?
- ]?
+ GETIN jsr
  Push0A jmp   end-code
 
 
@@ -124,8 +94,6 @@ Label restore   pha txa pha tya pha cld
 Label first-init
  sei cld
  RomBank lda  $f8 # and  RomBank sta \ map in KERNAL ROM
-\ TODO(issues/33): Remove this line accessing RomBank38.
- RomBank38 lda  $f8 # and  RomBank38 sta \ map in KERNAL ROM for R38
  IOINIT jsr  CINT jsr  RESTOR jsr  \ init. and set I/O-Vectors
  ink-pot    lda BrdCol sta \ border
  ink-pot 1+ lda BkgCol sta \ backgrnd
diff --git a/6502/C64/src/x16tmpheap.fth b/6502/C64/src/x16tmpheap.fth
index ac650f7..07b9a90 100644
--- a/6502/C64/src/x16tmpheap.fth
+++ b/6502/C64/src/x16tmpheap.fth
@@ -13,11 +13,10 @@ User tmpheap[
 User tmpheap>
 User ]tmpheap
 
-\ $9f61 is the X16 RAM bank select register. This will change to $0001
-\ in the next X16 board version.
+\ $0000 is the X16 RAM bank select register.
 \ 1 is the RAM bank selected for the tmpheap. RAM bank 0 is used by the
 \ X16 KERNAL. The banked RAM lives from $a000 to $bfff.
- 1 $9f61 c!  $a000 tmpheap[ !  $c000 dup ]tmpheap ! tmpheap> !
+ 1 $0000 c!  $a000 tmpheap[ !  $c000 dup ]tmpheap ! tmpheap> !
 
 : tmp-hallot  ( size -- addr )
     tmpheap> @ swap -
diff --git a/VERSIONS.ORG b/VERSIONS.ORG
new file mode 100644
index 0000000..8e59731
--- /dev/null
+++ b/VERSIONS.ORG
@@ -0,0 +1,37 @@
+#+Title: VolksForth versions
+
+* C64/C16/Plus4/CommanderX16
+
+*3.9.4*
+
+ * X16 version adapted to Kernal/Emulator version R41
+ * Some reduction in use of and dependence on Kernal variables in RAM
+
+*3.9.3*
+
+ * X16 version adapted to work with both versions R38 and R39 of
+ Kernal and Emulator, and thus with prototype boards #1 and #2
+ * Some code cleanup around moving word headers to the heap
+ and related tmpheap cleanup
+ * load, thru, +load, +thru were removed from the v4th versions
+ like the x16 version that don't have block/buffer disk access.
+
+*3.9.2*
+
+ * X16: Zero page area used by v4th moved from $30-$5b to $50-$7b,
+ inclusive, so that it now doesn't collide with the ROM version of X16Edit
+ * Initial prepartion for and implementation of tmpheap
+ * Some minor cleanups and bug fixes.
+
+*3.91*
+
+ * X16: Initial version
+
+*3.90*
+
+ * Built-in INCLUDE stream file interface
+ * Separate versions with and without BLOCK words
+ * C16-32k version resurrected and fixed
+ * An adapted subset of the ANS test suite is made to pass
+ * Makefile setup for build and test
+ * Build sources moved from BLOCK disk images to stream sources