diff --git a/pat80-io-devices/composite-pal-adapter/software/avr-assembly/README.md b/pat80-io-devices/composite-pal-adapter/software/avr-assembly/README.md
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+# Atmega Microcontroller
+## Build ASM code
+`avra filename.asm` (generates *filename.hex*)
+
+## Flash
+### Rom
+`minipro -w filename.hex -p ATMEGA1284`
+
+### Fuses
+Read fuses: `minipro -r -c config -p ATMEGA1284` (`-r -c config` means read configuration (fuses))
+Fuses must be written all together, so read the current values, edit the generated file and write it.
+The meaning of every bis is in the conf file.
+Write fuses: `minipro -w fuses.conf -c config -p ATMEGA1284`
\ No newline at end of file
diff --git a/pat80-io-devices/composite-pal-adapter/software/avr-assembly/fuses.conf b/pat80-io-devices/composite-pal-adapter/software/avr-assembly/fuses.conf
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+fuses_lo = 0x6F
+fuses_hi = 0x99
+fuses_ext = 0xff
+lock_byte = 0xff