diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..a7e55de
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+examples/**/*.bin
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..f5e543c
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,6 @@
+examples: profile
+
+.PHONY: profile
+
+profile:
+	bash examples/compile.sh examples/profile
diff --git a/asm/asm.go b/asm/asm.go
index fa0521c..88c6d95 100644
--- a/asm/asm.go
+++ b/asm/asm.go
@@ -93,8 +93,13 @@ func parseTwoSym(b *bytes.Buffer, arg Arg) (int, error) {
 		selector = strconv.FormatUint(uint64(*arg.Size), 10)
 		sym = *arg.Selector
 	} else if arg.Selector != nil {
-		sym = *arg.Sym
-		selector = *arg.Selector
+		if *arg.Sym == "*" {
+			sym = *arg.Selector
+			selector = *arg.Sym
+		} else {
+			sym = *arg.Sym
+			selector = *arg.Selector
+		}
 	}
 
 	n, err := writeSym(b, selector)
@@ -255,7 +260,7 @@ var (
 		{"Comment", `(?:#)[^\n]*`},
 		{"Ident", `^[A-Z]+`},
 		{"Size", `[0-9]+`},
-		{"Sym", `[a-zA-Z_][a-zA-Z0-9_]*`},
+		{"Sym", `[a-zA-Z_\*][a-zA-Z0-9_]*`},
 		{"Whitespace", `[ \t]+`},
 		{"EOL", `[\n\r]+`},
 		{"Quote", `["']`},
@@ -297,6 +302,9 @@ func writeDisplay(w *bytes.Buffer, s string) (int, error) {
 	return w.WriteString(s)
 }
 func writeSize(w *bytes.Buffer, n uint32) (int, error) {
+	if n == 0 {
+		return w.Write([]byte{0x01, 0x00})
+	}
 	bn := [4]byte{}
 	sz := numSize(n)
 	if sz > 4 {
diff --git a/cache/cache.go b/cache/cache.go
index d6fe1a2..a4cfb53 100644
--- a/cache/cache.go
+++ b/cache/cache.go
@@ -51,9 +51,12 @@ func(ca *Cache) Add(key string, value string, sizeLimit uint16) error {
 		}
 		return fmt.Errorf("key %v already defined in frame %v", key, checkFrame)
 	}
-	sz := ca.checkCapacity(value)
-	if sz == 0 {
-		return fmt.Errorf("Cache capacity exceeded %v of %v", ca.CacheUseSize + sz, ca.CacheSize)
+	var sz uint32
+	if len(value) > 0 {
+		sz = ca.checkCapacity(value)
+		if sz == 0 {
+			return fmt.Errorf("Cache capacity exceeded %v of %v", ca.CacheUseSize + sz, ca.CacheSize)
+		}
 	}
 	log.Printf("add key %s value size %v limit %v", key, sz, sizeLimit)
 	ca.Cache[len(ca.Cache)-1][key] = value
diff --git a/dev/interactive/main.go b/dev/interactive/main.go
index 9274c0a..1b85bb8 100644
--- a/dev/interactive/main.go
+++ b/dev/interactive/main.go
@@ -13,9 +13,11 @@ func main() {
 	var dir string
 	var root string
 	var size uint
+	//var sessionId string
 	flag.StringVar(&dir, "d", ".", "resource dir to read from")
 	flag.UintVar(&size, "s", 0, "max size of output")
 	flag.StringVar(&root, "root", "root", "entry point symbol")
+	//flag.StringVar(&sessionId, "session-id", "default", "session id")
 	flag.Parse()
 	fmt.Fprintf(os.Stderr, "starting session at symbol '%s' using resource dir: %s\n", root, dir)
 
diff --git a/engine/engine.go b/engine/engine.go
index 61a12cf..9efd98f 100644
--- a/engine/engine.go
+++ b/engine/engine.go
@@ -37,13 +37,13 @@ func NewEngine(cfg Config, st *state.State, rs resource.Resource, ca cache.Memor
 	if cfg.OutputSize > 0 {
 		szr = render.NewSizer(cfg.OutputSize)
 	}
+	ctx = context.WithValue(ctx, "sessionId", cfg.SessionId)
 	engine := Engine{
 		st: st,
 		rs: rs,
 		ca: ca,
 		vm: vm.NewVm(st, rs, ca, szr),
 	}
-	//if cfg.Root != "" {
 	if st.Moves == 0 {
 		engine.Init(cfg.Root, ctx)
 	}
diff --git a/examples/compile.bash b/examples/compile.bash
new file mode 100644
index 0000000..c77eeb2
--- /dev/null
+++ b/examples/compile.bash
@@ -0,0 +1,5 @@
+for f in $(ls $1); do
+	b=$(basename $f)
+	b=${b%.*}
+	go run ./dev/asm $1/$b.vis > $1/$b.bin
+done
diff --git a/examples/profile/entry_name b/examples/profile/entry_name
new file mode 100644
index 0000000..220fc22
--- /dev/null
+++ b/examples/profile/entry_name
@@ -0,0 +1,2 @@
+Name is currently: {{.myname}}
+Enter new name.
diff --git a/examples/profile/entry_name.vis b/examples/profile/entry_name.vis
new file mode 100644
index 0000000..f12a8a8
--- /dev/null
+++ b/examples/profile/entry_name.vis
@@ -0,0 +1,6 @@
+LOAD myname 32
+MAP myname
+MOUT 0 "abort"
+HALT
+INCMP 0 _
+INCMP * entry_name_save 
diff --git a/examples/profile/entry_name_save b/examples/profile/entry_name_save
new file mode 100644
index 0000000..e69de29
diff --git a/examples/profile/entry_name_save.vis b/examples/profile/entry_name_save.vis
new file mode 100644
index 0000000..9a28f13
--- /dev/null
+++ b/examples/profile/entry_name_save.vis
@@ -0,0 +1,3 @@
+LOAD entry_name_save 0
+RELOAD myname
+MOVE _
diff --git a/examples/profile/main.go b/examples/profile/main.go
new file mode 100644
index 0000000..8bfce79
--- /dev/null
+++ b/examples/profile/main.go
@@ -0,0 +1,58 @@
+package main
+
+import (
+	"context"
+	"flag"
+	"fmt"
+	"io/ioutil"
+	"os"
+	"path"
+
+	testdataloader "github.com/peteole/testdata-loader"
+
+	"git.defalsify.org/vise/cache"
+	"git.defalsify.org/vise/engine"
+	"git.defalsify.org/vise/resource"
+	"git.defalsify.org/vise/state"
+)
+
+var (
+	baseDir = testdataloader.GetBasePath()
+	scriptDir = path.Join(baseDir, "examples", "profile")
+)
+
+func nameSave(sym string, input []byte, ctx context.Context) (resource.Result, error) {
+	fp := path.Join(scriptDir, "myname.txt")
+	err := ioutil.WriteFile(fp, input, 0600)
+	return resource.Result{}, err
+}
+
+func main() {
+	var dir string
+	var root string
+	var size uint
+	var sessionId string
+	flag.UintVar(&size, "s", 0, "max size of output")
+	flag.StringVar(&root, "root", "root", "entry point symbol")
+	flag.StringVar(&sessionId, "session-id", "default", "session id")
+	flag.Parse()
+	fmt.Fprintf(os.Stderr, "starting session at symbol '%s' using resource dir: %s\n", root, dir)
+
+	st := state.NewState(0)
+	rs := resource.NewFsResource(scriptDir)
+	rs.AddLocalFunc("entry_name_save", nameSave)
+	ca := cache.NewCache()
+	cfg := engine.Config{
+		Root: "root",
+		SessionId: sessionId,
+		OutputSize: uint32(size),
+	}
+	ctx := context.Background()
+	en := engine.NewEngine(cfg, &st, &rs, ca, ctx)
+
+	err := engine.Loop(&en, os.Stdin, os.Stdout, ctx)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "loop exited with error: %v", err)
+		os.Exit(1)
+	}
+}
diff --git a/examples/profile/myname.txt b/examples/profile/myname.txt
new file mode 100644
index 0000000..c01de2b
--- /dev/null
+++ b/examples/profile/myname.txt
@@ -0,0 +1 @@
+inky
\ No newline at end of file
diff --git a/examples/profile/root b/examples/profile/root
new file mode 100644
index 0000000..1f4a867
--- /dev/null
+++ b/examples/profile/root
@@ -0,0 +1 @@
+Please input profile data
diff --git a/examples/profile/root.vis b/examples/profile/root.vis
new file mode 100644
index 0000000..b77977b
--- /dev/null
+++ b/examples/profile/root.vis
@@ -0,0 +1,3 @@
+DOWN entry_name 0 "name"
+DOWN entry_email 1 "email"
+DOWN entry_sex 2 "sex"
diff --git a/testdata/foo.fst b/testdata/foo.vis
similarity index 100%
rename from testdata/foo.fst
rename to testdata/foo.vis
diff --git a/vm/runner.go b/vm/runner.go
index d7e165a..db62bda 100644
--- a/vm/runner.go
+++ b/vm/runner.go
@@ -264,7 +264,7 @@ func(vm *Vm) RunMove(b []byte, ctx context.Context) ([]byte, error) {
 	if err != nil {
 		return b, err
 	}
-	log.Printf("loaded additional code: %x", code)
+	log.Printf("loaded code for %s: %x", sym, code)
 	b = append(b, code...)
 	vm.Reset()
 	return b, nil