I am looking for a list over various APDU commands, supported by the mifare ultralight cards, I have tried to search for how to lock bytes, making them permanently readonly, but so far unable to find anything, is it even possible to set any of these blocks to readonly, or is there even a permanently reset card to 0 ?
thanks again
All the information you are looking for are in the document "NFC Forum Type 2 Tag Operation Specification 1.1"
Here is a copy:
http://apps4android.org/nfc-specifications/NFCForum-TS-Type-2-Tag_1.1.pdf
In general, if you are looking for technical details, try the NFC Forum specifications first. You'll find pretty much everything NFC related in them.