LENA Assembly code disassembler written in Python.

disassembler.py

hex = [
  '800000',
	'8884b0',
	'808806',
	'808806',
	'808806',
	'808806',
	'808806',
	'808806',
	'808806',
	'808806',
	'808806',
	'8e8000',
	'090000',
	'111000',
	'8f8000',
	'c00020',
	'800000',
	'8f8008',
	'c00040',
	'800000',
	'8f84b8',
	'87f806',
	'87f806',
	'87f806',
	'87f806',
	'87f806',
	'87f806',
	'87f806',
	'c00048',
	'800000',
	'8f8500',
	'87f806',
	'c00058',
	'800000',
	'8a0500',
	'822006',
	'878200',
	'87fa00',
	'87fa00',
	'8ff808',
	'c00050',
	'800000',
	'c00008',
	'800000',
	'800000',
	'800000',
	'800000',
	'800000',
	'800000',
	'976800',
	'800000',
	'8ee808',
	'a80260',
	'800e82',
	'800000',
	'a00228',
	'800000',
	'a00260'
]

for j in range(len(hex)):
	i = hex[j]
	
	global str
	tmp = int(i, 16)
	tmp = bin(tmp)
	tmp = tmp[2:]
	
	#print i
	for i in range(len(tmp), 24):
		tmp = '0' + tmp
	
	op = tmp[1:5]
	r1 = tmp[5:9]
	r2 = tmp[9:13]
	r3 = tmp[13:17]
	r4 = tmp[17:21]
	fn = tmp[21:]
	
	if (op == '0000') : 
		op = "R"
		r1 = 'R' + str(int(r1,2)) + ' '
		r2 = 'R' + str(int(r2,2)) + ' '
		r3 = 'R' + str(int(r3,2))
		r4 = ''
	elif (op == '0001'):
		op = "I"
		r1 = 'R' + str(int(r1,2)) + ' '
		r2 = 'R' + str(int(r2,2)) + ' '
		r3 = str(int(r3+r4,2))
		r4 = ''
	elif (op == '1000'):
		op = "DMA"
		r1 = ''
		r2 = ''
		r3 = ''
		fn = ''
		if (r4 == '0100') : r4 = 'read_active'
		elif (r4 == '0101') : r4 = 'read_base_addr'
		elif (r4 == '0110') : r4 = 'read_horizontal_incr'
		elif (r4 == '0111') : r4 = 'read_vertical_incr'
		elif (r4 == '1000') : r4 = 'write_active'
		elif (r4 == '1001') : r4 = 'write_base_addr'
		elif (r4 == '1010') : r4 = 'write_horizontal_incr'
		elif (r4 == '1011') : r4 = 'write_vertical_incr'
		elif (r4 == '0001') : r4 = 'start'
	elif (op == '0010') :
		op = "LW"
	elif (op == '0100') :
		op = "JUMP"	
		r1 = str(int(r1+r2+r3+r4,2))
		r2 = ''
		r3 = ''
		r4 = ''
		fn = ''
	elif (op == '0101') :
		print(int(r1+r2+r3+r4,2))
		op = "BRANCH"
		r1 = str(int(r1+r2+r3+r4,2))
		r2 = ''
		r3 = ''
		r4 = ''
		fn = ''

	if (fn == '000'): fn = 'add'
	elif (fn == '001'): fn = 'sub'
	elif (fn == '010'): fn = 'slt'
	elif (fn == '011'): fn = 'and'
	elif (fn == '100'): fn = 'or'
	elif (fn == '101'): fn = 'eq'
	elif (fn == '110'): fn = 'sll'
	elif (fn == '111'): fn = 'srl'
	
	#print (str(tmp) + ' {'+str(len(tmp))+'}')
	print(str(j) + ' - ' + tmp[0:1] + ' ' + op + ' ' + r1 + r2 + r3 + r4 + ' ' + fn)