diff --git a/fRAMdump.go b/fRAMdump.go
new file mode 100644
index 0000000..602770d
--- /dev/null
+++ b/fRAMdump.go
@@ -0,0 +1,198 @@
+package main
+
+// build using
+// GOOS=linux GOARCH=arm64 go build fRAMdump.go
+
+import (
+	"bytes"
+	"compress/zlib"
+	"encoding/binary"
+	"fmt"
+	i2c "github.com/d2r2/go-i2c"
+	logger "github.com/d2r2/go-logger"
+	"hash/crc32"
+	"io/ioutil"
+	"log"
+	"os"
+	"strings"
+	"unicode"
+)
+
+func HexString(data []byte) string {
+	var buf bytes.Buffer
+	for i := 0; i < len(data)-1; i++ {
+		buf.WriteString(fmt.Sprintf("%02X ", data[i]))
+	}
+	buf.WriteString(fmt.Sprintf("%02X", data[len(data)-1]))
+	return buf.String()
+}
+
+func pstr(s []uint8) string {
+	return strings.Map(func(r rune) rune {
+		if unicode.IsPrint(r) {
+			return r
+		}
+		return '∿'
+	}, string(s))
+
+}
+
+func HexStringHdrN(data []byte, hdr string, N int) string {
+	var buf bytes.Buffer
+	NN := len(data)
+	for i := 0; i < len(data); {
+		t := NN
+		if t > N {
+			t = N
+		}
+		NN -= t
+		buf.WriteString(hdr)
+		for j := 0; j < t-1; j++ {
+			buf.WriteString(fmt.Sprintf("%02X ", data[i+j]))
+		}
+		buf.WriteString(fmt.Sprintf("%02X", data[i+t-1]))
+		if t < N {
+			for j := t; j < N; j++ {
+				buf.WriteString("   ")
+			}
+		}
+		buf.WriteString("    ")
+		buf.WriteString(pstr(data[i : i+t]))
+		buf.WriteString("\n")
+		i += t
+	}
+	return buf.String()
+}
+
+func dumpSystemSetup(data []uint8) {
+	crc1 := binary.LittleEndian.Uint32(data)
+	l := binary.LittleEndian.Uint32(data[4:])
+	crc2 := crc32.ChecksumIEEE(data[8 : 8+int(l)])
+	if crc1 != crc2 {
+		fmt.Printf("system setup crc error %x %x\n", crc1, crc2)
+		return
+	}
+	i := 8
+	fmt.Printf("System setup:\n")
+	fmt.Printf("\tLanguage: %x\n", data[i+1])
+	fmt.Printf("\tLoadLast: %x\n", data[i+2])
+	fmt.Printf("\tPowerStatus: %x\n", data[i+3])
+	fmt.Printf("\tGPIB: %x\n", data[i+4])
+	fmt.Printf("\tCycle count: %x\n", binary.LittleEndian.Uint64(data[i+5:]))
+	fmt.Printf("\tLive count: %d\n", binary.LittleEndian.Uint32(data[i+13:]))
+	fmt.Printf("\tKeep Imp: %x\n", data[i+17])
+	fmt.Printf("\tIPmode: %x\n\n", data[i+18])
+}
+
+func dumpMemFile(data []uint8) {
+	h1 := binary.LittleEndian.Uint32(data)
+	h2 := binary.LittleEndian.Uint32(data[4:])
+	if 0 != h1+h2 {
+		fmt.Printf("mem file header error %x %x\n", h1, h2)
+		return
+	}
+	for i := 8; i < len(data); {
+		id := binary.LittleEndian.Uint32(data[i:])
+		idn := binary.LittleEndian.Uint32(data[i+0x4:])
+		l := binary.LittleEndian.Uint32(data[i+0x8:])
+		ln := binary.LittleEndian.Uint32(data[i+0xC:])
+		if 0 != id+idn {
+			fmt.Printf("mem file id error %x %x\n", id, idn)
+			return
+		}
+		if 0 != l+ln {
+			fmt.Printf("mem file size error %x %x\n", l, ln)
+			return
+		}
+		if 0 == l {
+			return
+		}
+		i += 0x10
+		crc1 := binary.LittleEndian.Uint32(data[i:])
+		i += 0x4
+		crc2 := crc32.ChecksumIEEE(data[i : i+int(l)])
+		if crc1 != crc2 {
+			fmt.Printf("mem file crc error %x %x\n", crc1, crc2)
+			return
+		}
+		if l < 32 {
+			fmt.Printf("id:%04x data[%02x]:%v\n\n", id, l, HexString(data[i:i+int(l)]))
+		} else {
+			fmt.Printf("id:%04x data[%02x]:\n%v\n", id, l, HexStringHdrN(data[i:i+int(l)], "\t", 32))
+		}
+		i += int(l)
+	}
+}
+
+func dumpBinSetup(data []uint8) {
+	crc1 := binary.LittleEndian.Uint32(data)
+	l := binary.LittleEndian.Uint32(data[4:])
+	crc2 := crc32.ChecksumIEEE(data[8 : 8+int(l)])
+	if crc1 != crc2 {
+		fmt.Printf("setup data crc error %x %x\n", crc1, crc2)
+		return
+	}
+	l += 8
+	for i := 8; i < int(l); {
+		id := data[i]
+		i++
+		uncomp := data[i]
+		i++
+		x1 := data[i]
+		i++
+		x2 := data[i]
+		i++
+		dlen := int(binary.LittleEndian.Uint16(data[i:]))
+		i += 2
+		clen := int(binary.LittleEndian.Uint16(data[i:]))
+		i += 2
+		alen := int(binary.LittleEndian.Uint16(data[i:]))
+		i += 2
+		x3 := binary.LittleEndian.Uint16(data[i:])
+		i += 2
+		bd := data[i : i+clen]
+		if uncomp == 0 {
+			zr, err := zlib.NewReader(bytes.NewReader(bd))
+			if err != nil {
+				fmt.Printf("zlib error %v\n", err)
+				return
+			}
+			bd = make([]uint8, dlen)
+			n, err := zr.Read(bd)
+			if n != dlen {
+				i += alen
+				fmt.Printf("read %x %v\n", n, err)
+				continue
+			}
+			zr.Close()
+		}
+		fmt.Printf("ID:%02X,%02X,%02X,%X dlen:%3x clen:%3x alen:%3x\n%v\n", id, x1, x2, x3, dlen, clen, alen, HexStringHdrN(bd, "\t", 32))
+		i += alen
+	}
+
+}
+
+func main() {
+	logger.ChangePackageLogLevel("i2c", logger.InfoLevel)
+	i2c, err := i2c.NewI2C(0x50, 4)
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer i2c.Close()
+	fmt.Printf("i2c ready\n")
+	_, err = i2c.WriteBytes([]byte{0x00, 0x00})
+	if err != nil {
+		log.Fatal(err)
+	}
+	buf := make([]uint8, 0x2000)
+	n, err := i2c.ReadBytes(buf)
+	if err != nil {
+		log.Fatal(err)
+	}
+	fmt.Printf("data[%x] %v\n", n, HexString(buf[:16]))
+	ioutil.WriteFile("fram.bin", buf, os.ModePerm)
+
+	dumpSystemSetup(buf[0:0x100])
+	dumpMemFile(buf[0x100:0x800])
+	dumpBinSetup(buf[0x800:])
+}