417 lines
7.9 KiB
Python
Executable file
417 lines
7.9 KiB
Python
Executable file
#!/usr/bin/env python3
|
|
|
|
# retro-extend is a tool to load additional code into an image file. It
|
|
# takes the name of an image file and one or more source files to load
|
|
# into the image. After completion the image file will be updated with
|
|
# the changes.
|
|
#
|
|
# Copyright (c) 2010 - 2020, Charles Childers
|
|
# Optimizations and process() rewrite by Greg Copeland
|
|
#
|
|
# Usage:
|
|
#
|
|
# retro-extend.py image filename [filenames]
|
|
|
|
|
|
import os, sys, math, time, struct
|
|
from struct import pack, unpack
|
|
|
|
ip = 0
|
|
stack = [] * 128
|
|
address = []
|
|
memory = []
|
|
Interpreter = 0
|
|
|
|
|
|
def rxDivMod(a, b):
|
|
x = abs(a)
|
|
y = abs(b)
|
|
q, r = divmod(x, y)
|
|
if a < 0 and b < 0:
|
|
r *= -1
|
|
elif a > 0 and b < 0:
|
|
q *= -1
|
|
elif a < 0 and b > 0:
|
|
r *= -1
|
|
q *= -1
|
|
return q, r
|
|
|
|
|
|
def findEntry(named):
|
|
header = memory[2]
|
|
Done = False
|
|
while header != 0 and not Done:
|
|
if named == extractString(header + 3):
|
|
Done = True
|
|
else:
|
|
header = memory[header]
|
|
return header
|
|
|
|
|
|
def rxGetInput():
|
|
return ord(sys.stdin.read(1))
|
|
|
|
|
|
def rxDisplayCharacter():
|
|
global stack
|
|
if stack[-1] > 0 and stack[-1] < 128:
|
|
if stack[-1] == 8:
|
|
sys.stdout.write(chr(stack.pop()))
|
|
sys.stdout.write(chr(32))
|
|
sys.stdout.write(chr(8))
|
|
else:
|
|
sys.stdout.write(chr(stack.pop()))
|
|
else:
|
|
sys.stdout.write("\033[2J\033[1;1H")
|
|
stack.pop()
|
|
sys.stdout.flush()
|
|
|
|
|
|
def i_no():
|
|
pass
|
|
|
|
|
|
def i_li():
|
|
global ip, memory, stack, address
|
|
ip += 1
|
|
stack.append(memory[ip])
|
|
|
|
|
|
def i_du():
|
|
global ip, memory, stack, address
|
|
stack.append(stack[-1])
|
|
|
|
|
|
def i_dr():
|
|
global ip, memory, stack, address
|
|
stack.pop()
|
|
|
|
|
|
def i_sw():
|
|
global ip, memory, stack, address
|
|
a = stack[-2]
|
|
stack[-2] = stack[-1]
|
|
stack[-1] = a
|
|
|
|
|
|
def i_pu():
|
|
global ip, memory, stack, address
|
|
address.append(stack.pop())
|
|
|
|
|
|
def i_po():
|
|
global ip, memory, stack, address
|
|
stack.append(address.pop())
|
|
|
|
|
|
def i_ju():
|
|
global ip, memory, stack, address
|
|
ip = stack.pop() - 1
|
|
|
|
|
|
def i_ca():
|
|
global ip, memory, stack, address
|
|
address.append(ip)
|
|
ip = stack.pop() - 1
|
|
|
|
|
|
def i_cc():
|
|
global ip, memory, stack, address
|
|
target = stack.pop()
|
|
if stack.pop() != 0:
|
|
address.append(ip)
|
|
ip = target - 1
|
|
|
|
|
|
def i_re():
|
|
global ip, memory, stack, address
|
|
ip = address.pop()
|
|
|
|
|
|
def i_eq():
|
|
global ip, memory, stack, address
|
|
a = stack.pop()
|
|
b = stack.pop()
|
|
if b == a:
|
|
stack.append(-1)
|
|
else:
|
|
stack.append(0)
|
|
|
|
|
|
def i_ne():
|
|
global ip, memory, stack, address
|
|
a = stack.pop()
|
|
b = stack.pop()
|
|
if b != a:
|
|
stack.append(-1)
|
|
else:
|
|
stack.append(0)
|
|
|
|
|
|
def i_lt():
|
|
global ip, memory, stack, address
|
|
a = stack.pop()
|
|
b = stack.pop()
|
|
if b < a:
|
|
stack.append(-1)
|
|
else:
|
|
stack.append(0)
|
|
|
|
|
|
def i_gt():
|
|
global ip, memory, stack, address
|
|
a = stack.pop()
|
|
b = stack.pop()
|
|
if b > a:
|
|
stack.append(-1)
|
|
else:
|
|
stack.append(0)
|
|
|
|
|
|
def i_fe():
|
|
global ip, memory, stack, address
|
|
if stack[-1] == -1:
|
|
stack[-1] = len(stack) - 1
|
|
elif stack[-1] == -2:
|
|
stack[-1] = len(address)
|
|
elif stack[-1] == -3:
|
|
stack[-1] = len(memory)
|
|
elif stack[-1] == -4:
|
|
stack[-1] = -2147483648
|
|
elif stack[-1] == -5:
|
|
stack[-1] = 2147483647
|
|
else:
|
|
stack[-1] = memory[stack[-1]]
|
|
|
|
|
|
def i_st():
|
|
global ip, memory, stack, address
|
|
mi = stack.pop()
|
|
memory[mi] = stack.pop()
|
|
|
|
|
|
def i_ad():
|
|
global ip, memory, stack, address
|
|
t = stack.pop()
|
|
stack[-1] += t
|
|
stack[-1] = unpack("=l", pack("=L", stack[-1] & 0xFFFFFFFF))[0]
|
|
|
|
|
|
def i_su():
|
|
global ip, memory, stack, address
|
|
t = stack.pop()
|
|
stack[-1] -= t
|
|
stack[-1] = unpack("=l", pack("=L", stack[-1] & 0xFFFFFFFF))[0]
|
|
|
|
|
|
def i_mu():
|
|
global ip, memory, stack, address
|
|
t = stack.pop()
|
|
stack[-1] *= t
|
|
stack[-1] = unpack("=l", pack("=L", stack[-1] & 0xFFFFFFFF))[0]
|
|
|
|
|
|
def i_di():
|
|
global ip, memory, stack, address
|
|
a = stack[-1]
|
|
b = stack[-2]
|
|
stack[-1], stack[-2] = rxDivMod(b, a)
|
|
stack[-1] = unpack("=l", pack("=L", stack[-1] & 0xFFFFFFFF))[0]
|
|
stack[-2] = unpack("=l", pack("=L", stack[-2] & 0xFFFFFFFF))[0]
|
|
|
|
|
|
def i_an():
|
|
global ip, memory, stack, address
|
|
t = stack.pop()
|
|
stack[-1] &= t
|
|
|
|
|
|
def i_or():
|
|
global ip, memory, stack, address
|
|
t = stack.pop()
|
|
stack[-1] |= t
|
|
|
|
|
|
def i_xo():
|
|
global ip, memory, stack, address
|
|
t = stack.pop()
|
|
stack[-1] ^= t
|
|
|
|
|
|
def i_sh():
|
|
global ip, memory, stack, address
|
|
t = stack.pop()
|
|
if t < 0:
|
|
stack[-1] <<= t * -1
|
|
else:
|
|
stack[-1] >>= t
|
|
|
|
|
|
def i_zr():
|
|
global ip, memory, stack, address
|
|
if stack[-1] == 0:
|
|
stack.pop()
|
|
ip = address.pop()
|
|
|
|
|
|
def i_ha():
|
|
global ip, memory, stack, address
|
|
ip = 9000000
|
|
|
|
|
|
def i_ie():
|
|
stack.push(1)
|
|
|
|
|
|
def i_iq():
|
|
stack.pop()
|
|
stack.push(0)
|
|
stack.push(0)
|
|
|
|
|
|
def i_ii():
|
|
stack.pop()
|
|
rxDisplayCharacter()
|
|
|
|
|
|
instructions = [
|
|
i_no,
|
|
i_li,
|
|
i_du,
|
|
i_dr,
|
|
i_sw,
|
|
i_pu,
|
|
i_po,
|
|
i_ju,
|
|
i_ca,
|
|
i_cc,
|
|
i_re,
|
|
i_eq,
|
|
i_ne,
|
|
i_lt,
|
|
i_gt,
|
|
i_fe,
|
|
i_st,
|
|
i_ad,
|
|
i_su,
|
|
i_mu,
|
|
i_di,
|
|
i_an,
|
|
i_or,
|
|
i_xo,
|
|
i_sh,
|
|
i_zr,
|
|
i_ha,
|
|
i_ie,
|
|
i_iq,
|
|
i_ii,
|
|
]
|
|
|
|
|
|
def validateOpcode(opcode):
|
|
I0 = opcode & 0xFF
|
|
I1 = (opcode >> 8) & 0xFF
|
|
I2 = (opcode >> 16) & 0xFF
|
|
I3 = (opcode >> 24) & 0xFF
|
|
if (
|
|
(I0 >= 0 and I0 <= 29)
|
|
and (I1 >= 0 and I1 <= 29)
|
|
and (I2 >= 0 and I2 <= 29)
|
|
and (I3 >= 0 and I3 <= 29)
|
|
):
|
|
return True
|
|
else:
|
|
return False
|
|
|
|
|
|
def extractString(at):
|
|
i = at
|
|
s = ""
|
|
while memory[i] != 0:
|
|
s = s + chr(memory[i])
|
|
i = i + 1
|
|
return s
|
|
|
|
|
|
def injectString(s, to):
|
|
global memory
|
|
i = to
|
|
for c in s:
|
|
memory[i] = ord(c)
|
|
i = i + 1
|
|
memory[i] = 0
|
|
|
|
|
|
def execute(word, output="console"):
|
|
global ip, memory, stack, address
|
|
ip = word
|
|
address.append(0)
|
|
notfound = memory[findEntry("err:notfound") + 1]
|
|
while ip < 100000 and len(address) > 0:
|
|
if ip == notfound:
|
|
print("ERROR: word not found!:", extractString(1024))
|
|
opcode = memory[ip]
|
|
if validateOpcode(opcode):
|
|
I0 = opcode & 0xFF
|
|
I1 = (opcode >> 8) & 0xFF
|
|
I2 = (opcode >> 16) & 0xFF
|
|
I3 = (opcode >> 24) & 0xFF
|
|
if I0 != 0:
|
|
instructions[I0]()
|
|
if I1 != 0:
|
|
instructions[I1]()
|
|
if I2 != 0:
|
|
instructions[I2]()
|
|
if I3 != 0:
|
|
instructions[I3]()
|
|
else:
|
|
print("Invalid Bytecode", opcode, ip)
|
|
ip = 2000000
|
|
ip = ip + 1
|
|
return
|
|
|
|
|
|
def load_image():
|
|
global memory
|
|
cells = int(os.path.getsize("ngaImage") / 4)
|
|
f = open("ngaImage", "rb")
|
|
memory = list(struct.unpack(cells * "i", f.read()))
|
|
f.close()
|
|
remaining = 1000000 - cells
|
|
memory.extend([0] * remaining)
|
|
|
|
|
|
def process(line):
|
|
for Token in line.split(" "):
|
|
if Token != "":
|
|
injectString(Token, 1024)
|
|
stack.append(1024)
|
|
execute(Interpreter)
|
|
|
|
|
|
def process_files():
|
|
for f in sys.argv[2:]:
|
|
print(f)
|
|
in_block = False
|
|
with open(f, "r") as source:
|
|
for line in source.readlines():
|
|
if line.rstrip() == "~~~":
|
|
in_block = not in_block
|
|
elif in_block:
|
|
process(line.strip())
|
|
|
|
|
|
def save_image():
|
|
print("Writing {0} cells to {1}".format(memory[3], sys.argv[1]))
|
|
with open(sys.argv[1], "wb") as file:
|
|
j = 0
|
|
while j < memory[3]:
|
|
file.write(struct.pack("i", memory[j]))
|
|
j = j + 1
|
|
|
|
|
|
if __name__ == "__main__":
|
|
load_image()
|
|
Interpreter = memory[findEntry("interpret") + 1]
|
|
process_files()
|
|
save_image()
|