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serial programming instructions are not very orthoganal, i.e., the "read fuse bits" instruction on an ATMega103 is an entirely different opcode and data format from the _same_ instruction for an ATMega163! Thus, it becomes impossible to have a single instruction encoding (varying the data) across the chip lines. This set of changes allows and requires instruction encodings to be defined on a per-part basis within the configuration file. Hopefully I've defined the encoding scheme in a general enough way so it is useful in describing the instruction formats for yet-to-be invented Atmel chips. I've tried hard to make it match very closely with the specification in Atmel's data sheets for their parts. It's a little more verbose than what I initially hoped for, but I've tried to keep it as concise as I could, while still remaining reasonably flexible. git-svn-id: svn://svn.savannah.nongnu.org/avrdude/trunk/avrdude@100 81a1dc3b-b13d-400b-aceb-764788c761c2