50 lines
1.2 KiB
Python
50 lines
1.2 KiB
Python
|
from pathlib import Path
|
||
|
|
|
||
|
|
##
|
||
|
|
# See: http://www.westerndesigncenter.com/wdc/datasheets/Assembler_Linker.pdf
|
||
|
|
# page 37
|
||
|
|
#
|
||
|
|
# Initial byte 'Z' as signature.
|
||
|
|
#
|
||
|
|
# Then for each block:
|
||
|
|
# 3 byte address
|
||
|
|
# 3 byte length
|
||
|
|
# length bytes of data
|
||
|
|
#
|
||
|
|
# The final block has an address and length of 0.
|
||
|
|
#
|
||
|
|
|
||
|
|
class WdcBinFile:
|
||
|
|
"""Reads information from WDCTools BIN formated file"""
|
||
|
|
data = 0
|
||
|
|
handler = 0
|
||
|
|
|
||
|
|
def __init__(self):
|
||
|
|
pass
|
||
|
|
|
||
|
|
def open(self, filename):
|
||
|
|
self.data = Path(filename).read_bytes()
|
||
|
|
|
||
|
|
def close(self):
|
||
|
|
self.data = []
|
||
|
|
|
||
|
|
def set_handler(self, proc):
|
||
|
|
self.handler = proc
|
||
|
|
|
||
|
|
def read_blocks(self):
|
||
|
|
offset = 1
|
||
|
|
while offset < len(self.data):
|
||
|
|
(addr, block, offset) = self.__read_block(self.data, offset)
|
||
|
|
if addr > 0:
|
||
|
|
self.handler(addr, block)
|
||
|
|
|
||
|
|
def __read_block(self, data, offset):
|
||
|
|
addr = int.from_bytes(data[offset:offset+3], byteorder='little', signed=False)
|
||
|
|
size = int.from_bytes(data[offset+3:offset+6], byteorder='little', signed=False)
|
||
|
|
if addr == 0:
|
||
|
|
return (0, [], offset+6)
|
||
|
|
block = data[offset+6:offset+6+size]
|
||
|
|
return (addr, block, offset+6+size)
|
||
|
|
|
||
|
|
|