diff --git a/internal/pkg/asm.go b/internal/pkg/asm.go
index 86fc1e4a..73c63040 100644
--- a/internal/pkg/asm.go
+++ b/internal/pkg/asm.go
@@ -6,9 +6,71 @@ import (
 	"io"
 	"strconv"
 	"strings"
+	"unique"
 )
 
-type asmOutLine struct {
+type AsmMessage struct {
+	data AsmData
+	sig  AsmSig
+}
+type AsmGenerator struct {
+	i   uintptr
+	as  chan AsmMessage
+	lbl []uintptr
+}
+type AsmSig int
+
+const (
+	AsmSigEnd AsmSig = iota
+	AsmSigLbl
+	AsmSigHead
+	AsmSigVal
+)
+
+// GenerateAll collects all asm sent to this generator and outputs formatted data to the given [io.Writer].
+func (g *AsmGenerator) GenerateAll(w io.Writer) error {
+	for a := <-g.as; a.sig != AsmSigEnd; a = <-g.as {
+		switch a.sig {
+		case AsmSigLbl:
+
+			break
+		case AsmSigHead:
+
+			break
+		case AsmSigVal:
+			_, err := w.Write([]byte(a.data.Line(g)))
+			if err != nil {
+				return err
+			}
+			break
+		default:
+			panic("invalid asm signal")
+		}
+	}
+	return nil
+}
+
+type AsmFormatter struct {
+	// if false, generate labels. if true, bare idents will be shown.
+	Real bool
+	// if true, header data and the dependencies list will be shown.
+	ShowHeader bool
+	// if true, don't generate raw byte data (only generate raw assembly).
+	Raw bool
+}
+type AsmData interface {
+	Line(*AsmGenerator) string
+	Offset(int)
+}
+
+type AsmDataNone struct{}
+
+func (a AsmDataNone) Line(*AsmGenerator) string {
+	return ""
+}
+func (a AsmDataNone) Offset(int) {}
+
+type AsmLine struct {
 	pos       int
 	word      int
 	kindData  int64
@@ -18,7 +80,22 @@ type asmOutLine struct {
 	value     string
 }
 
-var spacingLine = asmOutLine{
+func (l AsmLine) Line(gen *AsmGenerator) string {
+	return ""
+}
+func (l AsmLine) Offset(offset int) {
+	l.pos += offset
+}
+
+type AsmHeaderLine struct {
+	pos      int
+	kind     string
+	kindData int64
+	label    string
+	id       unique.Handle[ID]
+}
+
+var spacingLine = AsmLine{
 	pos:       -1,
 	kindData:  -1,
 	valueData: nil,
@@ -28,7 +105,7 @@ var spacingLine = asmOutLine{
 }
 
 func Disassemble(r io.Reader, real bool, showHeader bool, force bool, raw bool) (s string, err error) {
-	var lines []asmOutLine
+	var lines []AsmLine
 	sb := new(strings.Builder)
 	header := true
 	pos := new(int)
@@ -46,10 +123,10 @@ func Disassemble(r io.Reader, real bool, showHeader bool, force bool, raw bool)
 				break
 			}
 			if showHeader {
-				lines = append(lines, asmOutLine{p, 8, int64(kind), bsize, 0, "head  " + intToKind(kind), ""})
+				lines = append(lines, AsmLine{p, 8, int64(kind), bsize, 0, "head  " + intToKind(kind), ""})
 			}
 			for i := 0; uint64(i) < size; i++ {
-				var did Checksum
+				var did ID
 				var dkind uint64
 				p := *pos
 				if _, dkind, err = nextUint64(r, pos); err != nil {
@@ -59,7 +136,7 @@ func Disassemble(r io.Reader, real bool, showHeader bool, force bool, raw bool)
 					break
 				}
 				if showHeader {
-					lines = append(lines, asmOutLine{p, 8, int64(dkind), nil, 1, intToKind(dkind), Encode(did)})
+					lines = append(lines, AsmLine{p, 8, int64(dkind), nil, 1, intToKind(dkind), Encode(did)})
 				}
 			}
 			header = false
@@ -82,9 +159,9 @@ func Disassemble(r io.Reader, real bool, showHeader bool, force bool, raw bool)
 				if _, sum, err = nextIdent(r, pos); err != nil {
 					break
 				}
-				lines = append(lines, asmOutLine{p, 4, int64(kind), ba, 1, "end ", Encode(sum)})
+				lines = append(lines, AsmLine{p, 4, int64(kind), ba, 1, "end ", Encode(sum)})
 			} else {
-				lines = append(lines, asmOutLine{p, 4, int64(kind), []byte{0, 0, 0, 0}, 1, "end ", ""})
+				lines = append(lines, AsmLine{p, 4, int64(kind), []byte{0, 0, 0, 0}, 1, "end ", ""})
 			}
 			lines = append(lines, spacingLine)
 			header = true
@@ -96,12 +173,12 @@ func Disassemble(r io.Reader, real bool, showHeader bool, force bool, raw bool)
 			if a, _, err = nextUint32(r, pos); err != nil {
 				break
 			}
-			var sum Checksum
-			if _, sum, err = nextIdent(r, pos); err != nil {
+			var id ID
+			if _, id, err = nextIdent(r, pos); err != nil {
 				break
 			}
 
-			lines = append(lines, asmOutLine{p, 4, int64(kind), a, 1, "id  ", Encode(sum)})
+			lines = append(lines, AsmLine{p, 4, int64(kind), a, 1, "id  ", Encode(id)})
 			continue
 		case IRKindUint32:
 			var i uint32
@@ -109,7 +186,7 @@ func Disassemble(r io.Reader, real bool, showHeader bool, force bool, raw bool)
 			if bi, i, err = nextUint32(r, pos); err != nil {
 				break
 			}
-			lines = append(lines, asmOutLine{p, 4, int64(kind), bi, 1, "int ", strconv.FormatUint(uint64(i), 10)})
+			lines = append(lines, AsmLine{p, 4, int64(kind), bi, 1, "int ", strconv.FormatUint(uint64(i), 10)})
 		case IRKindString:
 			var l uint32
 			var bl []byte
@@ -123,14 +200,14 @@ func Disassemble(r io.Reader, real bool, showHeader bool, force bool, raw bool)
 			}
 			*pos = *pos + n
 
-			lines = append(lines, asmOutLine{p, 4, int64(kind), bl, 1, "str ", strconv.Quote(string(s[:l]))})
+			lines = append(lines, AsmLine{p, 4, int64(kind), bl, 1, "str ", strconv.Quote(string(s[:l]))})
 			continue
 		default:
 			var bi []byte
 			if bi, _, err = nextUint32(r, pos); err != nil {
 				break
 			}
-			lines = append(lines, asmOutLine{p, 4, int64(kind), bi, 1, "????", ""})
+			lines = append(lines, AsmLine{p, 4, int64(kind), bi, 1, "????", ""})
 		}
 	}
 	if err != io.EOF {
@@ -182,14 +259,14 @@ func nextUint64(r io.Reader, pos *int) ([]byte, uint64, error) {
 	*pos = p
 	return i, binary.LittleEndian.Uint64(i), nil
 }
-func nextIdent(r io.Reader, pos *int) ([]byte, Checksum, error) {
+func nextIdent(r io.Reader, pos *int) ([]byte, ID, error) {
 	i := make([]byte, 48)
 	if _, err := r.Read(i); err != nil {
-		return i, Checksum{}, err
+		return i, ID{}, err
 	}
 	p := *pos + 48
 	*pos = p
-	return i, Checksum(i), nil
+	return i, ID(i), nil
 }
 func intToKind(i uint64) string {
 	switch Kind(i) {