Add RT809F instructions

RT809F.md

@@ -0,0 +1,33 @@
+# RT809F Programmer
+
+In order to flash System76 EC's using ISP, you need to purchase an RT809F
+programmer, the PEB-1 "Program Extend Board", and the ITE Adapter. These can
+be found on www.ifix.net.cn.
+
+You can install the RT809F software found there as well. Then replace the
+contents of ITE.ini with the following:
+
+```
+[PinOut0]
+NoteBook=SYSTEM76 GALP3-C
+BoardNo=
+ChipMark=IT8587E
+JKBPins=24
+Invert=0
+AddBy=jackpot51
+KSO0=1
+KSO1=2
+KSO2=3
+KSO3=7
+KSO4=9
+KSO5=10
+KSO6=13
+KSO7=16
+KSO9=18
+KSI0=4
+KSI1=5
+KSI2=6
+KSI3=8
+KSI4=11
+KSI5=12
+```