AppleIIFontShift

#!/Library/Frameworks/Python.framework/Versions/3.6/bin/python3

import sys,os,fileinput


def main(argv):
	for line in fileinput.input():
		bytes = line.lstrip(".byte ").rstrip('\n').split(',')
		
		print(".byte ", end="") 
		
		for i,byte in enumerate(bytes):
			hexValue = int(byte.lstrip('$'),16)
			hexFormat = "${:02x}"
			print(hexFormat.format((hexValue<<2)&255), end="")
			if i != len(bytes) - 1:
				print(",",end="")
		print("");
		
if __name__ == "__main__":
	main(sys.argv[1:])
	

run by cat Apple2BootFont.txt | ./Apple2FontShift.py