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Recent original .bin files showed up with a version[0] of 49152
= 0xC000, which won't pass our current sanity checks. Restrict
version[0] check to lower 14 bits, to make it pass again.

(This might require further investigation in the future, as it's
possible that this particular header field actually isn't related
to version data at all.)

Fixes #51.
Signed-off-by: Bernhard Nortmann <bernhard.nortmann@web.de>

Both the error output in function decompile_section() and the
definition of GPIO_BANK_MAX in script.h suffered from an "off
by one" logic. The bank numbering in the .bin is based on 1,
so it should be added to ('A' - 1) for human-readable output,
and the maximum number corresponding to 'N' is 14.

This became apparent when trying to translate a fex2bin-compiled
a80_optimus_board.bin back to its original .fex equivalent.
Signed-off-by: Bernhard Nortmann <bernhard.nortmann@web.de>

Move some lines so that the safeguards run (and exit, if needed)
before the normal output of header information.
Signed-off-by: Bernhard Nortmann <bernhard.nortmann@web.de>

When declaring 'signed' values for section count and version
information in the script_bin_head structure, testing them to be
below certain thresholds (SCRIPT_BIN_*_LIMIT) is insufficient;
as 'negative' values like in "fexc-bin: script.bin: version:
-404840454.-1074397186.-1073906177" would still pass.

Fix this by making these member fields unsigned.
Signed-off-by: Bernhard Nortmann <bernhard.nortmann@web.de>

Signed-off-by: Henrik Nordstrom <henrik@henriknordstrom.net>

Signed-off-by: Luc Verhaegen <libv@skynet.be>

needed for A31 support. closes issue #9
Signed-off-by: Alejandro Mery <amery@geeks.cl>