blob: caf0b85a822772f84b2dedda74327ffd98882fa5 [file] [log] [blame]
#!/usr/bin/env python2
# HP Compaq 6715b ROM unpacker by roxfan
# compressed data begins like this:
# 0000010000: 01 00 14 01 70 00 00 00 | 60 00 00 00 00 00 02 00 O .Op . O
# 0000010010: 50 4F 53 54 FF B8 00 20 | 8E D8 66 B8 10 FF 20 00 POST.. ..f...
import struct, array, sys
def unpack1(cdata, ulen):
pos = 0
odata = ""
while ulen:
a = ord(cdata[pos])
# print "%x: %x" % (pos, a)
pos += 1
if a == 0xFF:
odata += cdata[pos:pos+8]
ulen -= 8
pos += 8
else:
mask = a | 0x100
while mask and ulen:
# print hex(mask), hex(pos)
b = mask & 1
mask >>= 1
if mask == 0:
break
if b:
odata += cdata[pos]
pos += 1
ulen -= 1
else:
delta = ord(cdata[pos])
pos += 1
delta |= ord(cdata[pos])<<8
pos += 1
count = (delta & 0xF) + 3
delta >>= 4
# print "d: %d, c: %d" % (delta, count)
opos = len(odata)-delta
while count:
odata += odata[opos]
opos += 1
count -= 1
ulen -= 1
return odata
f = open(sys.argv[1], "rb")
f.seek(0x10000)
while True:
flags, ulen, clen, dest = struct.unpack("<IIII", f.read(0x10))
comp = flags & 0xFF
if comp > 1:
break
hdrlen = (flags>>16) & 0xFF
unk = (flags>>24) & 0xFF
print "comp: %d, hdr len: 0x%X, unk: %d, ulen: 0x%X, clen: 0x%X, dest: 0x%X" % (comp, hdrlen, unk, ulen, clen,
dest)
extra = f.read(hdrlen-0x10).rstrip('\0')
print " %s" % extra
cdata = f.read(clen)
fname = "%04X_%s.bin" % (dest>>4, extra)
if comp == 1:
cdata = unpack1(cdata, ulen)
open(fname, "wb").write(cdata)