diff --git a/build/dep_globals.sh b/build/dep_globals.sh
index 8477492..2ea636e 100644
--- a/build/dep_globals.sh
+++ b/build/dep_globals.sh
@@ -1,10 +1,11 @@
 #!/bin/bash
 
 # author        Oliver Blaser
-# date          04.05.2022
+# date          12.05.2022
 # copyright     MIT - Copyright (c) 2022 Oliver Blaser
 
 versionstr=$(head -n 1 dep_vstr.txt)
+prjDirName="rpihal"
 
 function ptintTitle()
 {
@@ -15,3 +16,27 @@ function ptintTitle()
         echo -e "\033[3$2m  --=====#   \033[9$2m$1\033[3$2m   #=====--\033[39m"
     fi
 }
+
+function writeReadmeFile()
+{
+    echo ""                                                                                              > $1
+    echo "                           \$\$                    \$\$\$"                                     >> $1
+    echo "                       \$\$  \$\$                    \$\$\$"                                   >> $1
+    echo "                       \$\$  \$\$                     \$\$"                                    >> $1
+    echo "                           \$\$                     \$\$"                                      >> $1
+    echo "\$\$ \$\$\$\$\$   \$\$ \$\$\$\$\$   \$\$\$  \$\$ \$\$\$\$\$     \$\$\$\$\$ \$\$  \$\$"         >> $1
+    echo "\$\$\$\$\$\$\$\$\$  \$\$\$\$\$\$\$\$\$  \$\$\$  \$\$\$\$\$\$\$\$\$   \$\$\$\$\$\$\$\$\$  \$\$" >> $1
+    echo "\$\$\$    \$\$\$ \$\$\$    \$\$\$  \$\$  \$\$\$    \$\$\$ \$\$\$    \$\$\$  \$\$"              >> $1
+    echo "\$\$         \$\$      \$\$  \$\$  \$\$      \$\$ \$\$      \$\$  \$\$"                        >> $1
+    echo "\$\$         \$\$      \$\$  \$\$  \$\$      \$\$ \$\$      \$\$  \$\$"                        >> $1
+    echo "\$\$         \$\$\$    \$\$\$  \$\$  \$\$      \$\$ \$\$\$    \$\$\$  \$\$"                    >> $1
+    echo "\$\$         \$\$\$\$\$\$\$\$\$  \$\$\$\$ \$\$      \$\$  \$\$\$\$\$\$\$\$\$ \$\$\$\$"         >> $1
+    echo "\$\$         \$\$  \$\$\$\$   \$\$\$\$ \$\$      \$\$   \$\$\$\$\$ \$\$ \$\$\$\$"              >> $1
+    echo "           \$\$"                                                                               >> $1
+    echo "           \$\$"                                                                               >> $1
+    echo "           \$\$              v$versionstr"                                                     >> $1
+    echo ""                                                                                              >> $1
+    echo ""                                                                                              >> $1
+    echo ""                                                                                              >> $1
+    echo "GitHub      https://github.com/oblaser/rpihal/"                                                >> $1
+}
diff --git a/build/dep_vstr.txt b/build/dep_vstr.txt
index 388bb06..d8cfec1 100644
--- a/build/dep_vstr.txt
+++ b/build/dep_vstr.txt
@@ -1 +1 @@
-0.1.0-alpha
+0.1.0-rc
diff --git a/build/pack_source.sh b/build/pack_source.sh
new file mode 100644
index 0000000..27dc253
--- /dev/null
+++ b/build/pack_source.sh
@@ -0,0 +1,29 @@
+#!/bin/bash
+
+# author        Oliver Blaser
+# date          12.05.2022
+# copyright     MIT - Copyright (c) 2022 Oliver Blaser
+
+source dep_globals.sh
+
+packedDir="./packed"
+outDirName="${prjDirName}_src"
+outDir="$packedDir/$outDirName"
+archive="$packedDir/${prjDirName}_src_v$versionstr.tar.gz"
+
+
+
+rm -rf $outDir
+
+mkdir -p $outDir/$prjDirName
+mkdir $outDir/$prjDirName/include
+mkdir $outDir/$prjDirName/src
+
+cp -r ../include/* $outDir/$prjDirName/include
+cp -r ../src/* $outDir/$prjDirName/src
+
+writeReadmeFile $outDir/$prjDirName/readme.txt
+cp ../license.txt $outDir/$prjDirName
+
+rm -f $archive
+tar -czf $archive -C $outDir $prjDirName
diff --git a/build/readme.md b/build/readme.md
index 79b3941..b728aa9 100644
--- a/build/readme.md
+++ b/build/readme.md
@@ -1,5 +1,7 @@
 # Build Scripts
 
+> `cmake` isn't set up yet, thus `build.sh` doesn't do something useful for now.
+
 The scripts must have this directory as working directory.
 
 `dep_*` files are dependencies of the scripts and should not be called directly.
@@ -20,5 +22,4 @@ Eexcept the `pack_*` scripts don't.
 ### files to edit on version update
 
 - `build/dep_vstr.txt`
-- ~~`build/dep_readme.txt`~~
-- `include/rpihal/defs.h.h`
+- `include/rpihal/defs.h`
diff --git a/include/rpihal/defs.h b/include/rpihal/defs.h
index 0ce5e2e..da3612e 100644
--- a/include/rpihal/defs.h
+++ b/include/rpihal/defs.h
@@ -15,7 +15,7 @@ extern "C" {
 #define RPIHAL_VERSION_MAJOR            0
 #define RPIHAL_VERSION_MINOR            1
 #define RPIHAL_VERSION_PATCH            0
-#define RPIHAL_VERSION_PRERELEASE       "alpha"
+#define RPIHAL_VERSION_PRERELEASE       "rc"
 
 #define RPIHAL_VERSION_ISPRERELEASE     1
 
diff --git a/readme.md b/readme.md
index 594b554..9264161 100644
--- a/readme.md
+++ b/readme.md
@@ -1,22 +1,26 @@
-# Raspberry Pi Hardware Abstraction Layer
+# raspihal
 
-Not completed. Grows as I need it.
+A Raspberry Pi Hardware Abstraction Layer for C/C++ projects.
 
+> Not completed. Grows as I need it.
 
 
-# GPIO Module
 
-> __CAUTION!__ Currently only supports models with the _~~BCM283x~~_ BCM2836 and BCM2837. Be aware of the different header pinouts on the various boards!
+## GPIO Module
 
-> __CAUTION!__ look for _DEVICE SPECIFIC_ or _DEVSPEC_ comments in code.
+> __CAUTION!__ Currently only supports models with the BCM2836, BCM2837 and BCM2837B0. _~~BCM283x. Be aware of the different header pinouts on the various boards!~~_
+>
+> Search for _DEVSPEC_ comments in code to find the critical portions.
 
-Supported Models:
-- 2B
-- 3A+
-- 3B
-- 3B+
+### Supported Models:
+`2B`
+`3A+`
+`3B`
+`3B+`
 
-## Links
+These all have the 40 pin header, which has the same pinout on all models listed above.
+
+### Links
 
 - https://elinux.org/RPi_GPIO_Code_Samples
 - https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#general-purpose-io-gpio
diff --git a/release-notes.md b/release-notes.md
index df2cc18..fcb39f3 100644
--- a/release-notes.md
+++ b/release-notes.md
@@ -2,7 +2,9 @@
 
 
 
-### v0.1.0
+### v0.1.0-rc
 
+New
  - init pin as IN, OUT or AF
  - read and write I/O pin
+ - Serial/UART library