mirror of
https://github.com/jtauber/applepy.git
synced 2024-11-26 01:49:16 +00:00
control channel is now HTTP/REST/JSON
This commit is contained in:
Greg Hewgill
parent
0604bd1515
commit
80e95d114b
246
cpu6502.py
246
cpu6502.py
@ -3,6 +3,9 @@
|
||||
# originally written 2001, updated 2011
|
||||
|
||||
|
||||
import BaseHTTPServer
|
||||
import json
|
||||
import re
|
||||
import select
|
||||
import socket
|
||||
import struct
|
||||
@ -117,7 +120,7 @@ class Disassemble:
|
||||
self.setup_ops()
|
||||
|
||||
def setup_ops(self):
|
||||
self.ops = [None] * 0x100
|
||||
self.ops = [(1, "???")] * 0x100
|
||||
self.ops[0x00] = (1, "BRK", )
|
||||
self.ops[0x01] = (2, "ORA", self.indirect_x_mode)
|
||||
self.ops[0x05] = (2, "ORA", self.zero_page_mode)
|
||||
@ -272,143 +275,205 @@ class Disassemble:
|
||||
|
||||
def absolute_mode(self, pc):
|
||||
a = self.cpu.read_word(pc + 1)
|
||||
return "$%04X [%04X] = %02X" % (a, a, self.cpu.read_word(a))
|
||||
return {
|
||||
"operand": "$%04X" % a,
|
||||
"memory": [a, 2, self.cpu.read_word(a)],
|
||||
}
|
||||
|
||||
def absolute_x_mode(self, pc):
|
||||
a = self.cpu.read_word(pc + 1)
|
||||
e = a + self.cpu.x_index
|
||||
return "$%04X,X [%04X] = %02X" % (a, e, self.cpu.read_byte(e))
|
||||
return {
|
||||
"operand": "$%04X,X" % a,
|
||||
"memory": [e, 1, self.cpu.read_byte(e)],
|
||||
}
|
||||
|
||||
def absolute_y_mode(self, pc):
|
||||
a = self.cpu.read_word(pc + 1)
|
||||
e = a + self.cpu.y_index
|
||||
return "$%04X,Y [%04X] = %02X" % (a, e, self.cpu.read_byte(e))
|
||||
return {
|
||||
"operand": "$%04X,Y" % a,
|
||||
"memory": [e, 1, self.cpu.read_byte(e)],
|
||||
}
|
||||
|
||||
def immediate_mode(self, pc):
|
||||
return "#$%02X" % (self.cpu.read_byte(pc + 1))
|
||||
return {
|
||||
"operand": "#$%02X" % (self.cpu.read_byte(pc + 1)),
|
||||
}
|
||||
|
||||
def indirect_mode(self, pc):
|
||||
a = self.cpu.read_word(pc + 1)
|
||||
return "($%04X) [%04X] = %02X" % (a, a, self.cpu.read_word(a))
|
||||
return {
|
||||
"operand": "($%04X)" % a,
|
||||
"memory": [a, 2, self.cpu.read_word(a)],
|
||||
}
|
||||
|
||||
def indirect_x_mode(self, pc):
|
||||
z = self.cpu.read_byte(pc + 1)
|
||||
a = self.cpu.read_word((z + self.cpu.x_index) % 0x100)
|
||||
return "($%02X,X) [%04X] = %02X" % (z, a, self.cpu.read_byte(a))
|
||||
return {
|
||||
"operand": "($%02X,X)" % z,
|
||||
"memory": [a, 1, self.cpu.read_byte(a)],
|
||||
}
|
||||
|
||||
def indirect_y_mode(self, pc):
|
||||
z = self.cpu.read_byte(pc + 1)
|
||||
a = self.cpu.read_word(z) + self.cpu.y_index
|
||||
return "($%02X),Y [%04X] = %02X" % (z, a, self.cpu.read_byte(a))
|
||||
return {
|
||||
"operand": "($%02X),Y" % z,
|
||||
"memory": [a, 1, self.cpu.read_byte(a)],
|
||||
}
|
||||
|
||||
def relative_mode(self, pc):
|
||||
return "$%04X" % (pc + signed(self.cpu.read_byte(pc + 1) + 2))
|
||||
return {
|
||||
"operand": "$%04X" % (pc + signed(self.cpu.read_byte(pc + 1) + 2)),
|
||||
}
|
||||
|
||||
def zero_page_mode(self, pc):
|
||||
a = self.cpu.read_byte(pc + 1)
|
||||
return "$%02X [%04X] = %02X" % (a, a, self.cpu.read_byte(a))
|
||||
return {
|
||||
"operand": "$%02X" % a,
|
||||
"memory": [a, 1, self.cpu.read_byte(a)],
|
||||
}
|
||||
|
||||
def zero_page_x_mode(self, pc):
|
||||
z = self.cpu.read_byte(pc + 1)
|
||||
a = (z + self.cpu.x_index) % 0x100
|
||||
return "$%02X,X [%04X] = %02X" % (z, a, self.cpu.read_byte(a))
|
||||
return {
|
||||
"operand": "$%02X,X" % z,
|
||||
"memory": [a, 1, self.cpu.read_byte(a)],
|
||||
}
|
||||
|
||||
def zero_page_y_mode(self, pc):
|
||||
z = self.cpu.read_byte(pc + 1)
|
||||
a = (z + self.cpu.y_index) % 0x100
|
||||
return "$%02X,Y [%04X] = %02X" % (z, a, self.cpu.read_byte(a))
|
||||
return {
|
||||
"operand": "$%02X,Y" % z,
|
||||
"memory": [a, 1, self.cpu.read_byte(a)],
|
||||
}
|
||||
|
||||
def disasm(self, pc):
|
||||
op = self.cpu.read_byte(pc)
|
||||
info = self.ops[op]
|
||||
s = "%04X " % (pc)
|
||||
for i in range(3):
|
||||
if i < info[0]:
|
||||
s += "%02X " % self.cpu.read_byte(pc + i)
|
||||
else:
|
||||
s += " "
|
||||
s += " %s" % (info[1])
|
||||
r = {
|
||||
"address": pc,
|
||||
"bytes": [self.cpu.read_byte(pc + i) for i in range(info[0])],
|
||||
"mnemonic": info[1],
|
||||
}
|
||||
if len(info) > 2:
|
||||
s += " " + info[2](pc)
|
||||
return s
|
||||
r.update(info[2](pc))
|
||||
return r, info[0]
|
||||
|
||||
|
||||
class ControlHandler:
|
||||
class ControlHandler(BaseHTTPServer.BaseHTTPRequestHandler):
|
||||
|
||||
def __init__(self, cpu, sock):
|
||||
def __init__(self, request, client_address, server, cpu):
|
||||
self.cpu = cpu
|
||||
self.sock = sock
|
||||
self.sock.send("ApplePy 6502 core\n")
|
||||
self.buffer = ""
|
||||
self.disassemble = Disassemble(self.cpu, self.cpu.memory)
|
||||
|
||||
def cmd_disassemble(self, args):
|
||||
addr = int(args[1])
|
||||
self.sock.send(self.disassemble.disasm(addr) + "\n")
|
||||
self.get_urls = {
|
||||
r"/disassemble/(\d+)$": self.get_disassemble,
|
||||
r"/memory/(\d+)(-(\d+))?$": self.get_memory,
|
||||
r"/memory/(\d+)(-(\d+))?/raw$": self.get_memory_raw,
|
||||
r"/status$": self.get_status,
|
||||
}
|
||||
|
||||
def cmd_dump(self, args):
|
||||
addr = int(args[1])
|
||||
length = int(args[2])
|
||||
self.sock.send(" ".join("%02X" % self.cpu.read_byte(x) for x in range(addr, addr + length)) + "\n")
|
||||
self.post_urls = {
|
||||
#r"/memory/(\d+)(-(\d+))?$": self.post_memory,
|
||||
#r"/memory/(\d+)(-(\d+))?/raw$": self.post_memory_raw,
|
||||
r"/quit$": self.post_quit,
|
||||
r"/reset$": self.post_reset,
|
||||
}
|
||||
|
||||
def cmd_help(self, args):
|
||||
self.sock.send("commands: %s\n" % ", ".join(sorted(x[4:] for x in dir(self) if x.startswith("cmd_"))))
|
||||
BaseHTTPServer.BaseHTTPRequestHandler.__init__(self, request, client_address, server)
|
||||
|
||||
def cmd_peek(self, args):
|
||||
addr = int(args[1])
|
||||
self.sock.send("%02X\n" % self.cpu.read_byte(addr))
|
||||
def log_request(self, code, size=0):
|
||||
pass
|
||||
|
||||
def cmd_poke(self, args):
|
||||
addr = int(args[1])
|
||||
val = int(args[2])
|
||||
self.cpu.write_byte(addr, val)
|
||||
self.sock.send("poked\n")
|
||||
def dispatch(self, urls):
|
||||
for r, f in urls.items():
|
||||
m = re.match(r, self.path)
|
||||
if m is not None:
|
||||
f(m)
|
||||
break
|
||||
else:
|
||||
self.send_response(404)
|
||||
self.end_headers()
|
||||
|
||||
def cmd_status(self, args):
|
||||
self.sock.send("A=%02X X=%02X Y=%02X S=%02X PC=%04X F=%c%c0%c%c%c%c%c\n" % (
|
||||
self.cpu.accumulator,
|
||||
self.cpu.x_index,
|
||||
self.cpu.y_index,
|
||||
self.cpu.stack_pointer,
|
||||
self.cpu.program_counter,
|
||||
"N" if self.cpu.sign_flag else "n",
|
||||
"V" if self.cpu.overflow_flag else "v",
|
||||
"B" if self.cpu.break_flag else "b",
|
||||
"D" if self.cpu.decimal_mode_flag else "d",
|
||||
"I" if self.cpu.interrupt_disable_flag else "i",
|
||||
"Z" if self.cpu.zero_flag else "z",
|
||||
"C" if self.cpu.carry_flag else "c",
|
||||
))
|
||||
def response(self, s):
|
||||
self.send_response(200)
|
||||
self.send_header("Content-Length", str(len(s)))
|
||||
self.end_headers()
|
||||
self.wfile.write(s)
|
||||
|
||||
def cmd_quit(self, args):
|
||||
def do_GET(self):
|
||||
self.dispatch(self.get_urls)
|
||||
|
||||
def do_POST(self):
|
||||
self.dispatch(self.post_urls)
|
||||
|
||||
def get_disassemble(self, m):
|
||||
addr = int(m.group(1))
|
||||
r = []
|
||||
n = 20
|
||||
while n > 0:
|
||||
dis, length = self.disassemble.disasm(addr)
|
||||
r.append(dis)
|
||||
addr += length
|
||||
n -= 1
|
||||
self.response(json.dumps(r))
|
||||
|
||||
def get_memory_raw(self, m):
|
||||
addr = int(m.group(1))
|
||||
e = m.group(3)
|
||||
if e is not None:
|
||||
end = int(e)
|
||||
else:
|
||||
end = addr
|
||||
self.response("".join([chr(self.cpu.read_byte(x)) for x in range(addr, end + 1)]))
|
||||
|
||||
def get_memory(self, m):
|
||||
addr = int(m.group(1))
|
||||
e = m.group(3)
|
||||
if e is not None:
|
||||
end = int(e)
|
||||
else:
|
||||
end = addr
|
||||
self.response(json.dumps(list(map(self.cpu.read_byte, range(addr, end + 1)))))
|
||||
|
||||
def get_status(self, m):
|
||||
self.response(json.dumps(dict((x, getattr(self.cpu, x)) for x in (
|
||||
"accumulator",
|
||||
"x_index",
|
||||
"y_index",
|
||||
"stack_pointer",
|
||||
"program_counter",
|
||||
"sign_flag",
|
||||
"overflow_flag",
|
||||
"break_flag",
|
||||
"decimal_mode_flag",
|
||||
"interrupt_disable_flag",
|
||||
"zero_flag",
|
||||
"carry_flag",
|
||||
))))
|
||||
|
||||
def post_quit(self, m):
|
||||
self.cpu.quit = True
|
||||
self.sock.send("quitting\n")
|
||||
self.response("")
|
||||
|
||||
def cmd_reset(self, args):
|
||||
def post_reset(self, m):
|
||||
self.cpu.reset()
|
||||
self.cpu.running = True
|
||||
self.sock.send("resetting\n")
|
||||
self.response("")
|
||||
|
||||
def fileno(self):
|
||||
return self.sock.fileno()
|
||||
|
||||
def handle_read(self):
|
||||
buf = self.sock.recv(1024)
|
||||
if not buf:
|
||||
self.cpu.control.remove(self)
|
||||
return
|
||||
self.buffer += buf
|
||||
while True:
|
||||
i = self.buffer.find("\n")
|
||||
if i < 0:
|
||||
break
|
||||
s = self.buffer[:i].strip()
|
||||
self.buffer = self.buffer[i+1:]
|
||||
a = s.split()
|
||||
try:
|
||||
getattr(self, "cmd_" + a[0])(a)
|
||||
except AttributeError:
|
||||
self.sock.send("unknown command\n")
|
||||
class ControlHandlerFactory:
|
||||
|
||||
def __init__(self, cpu):
|
||||
self.cpu = cpu
|
||||
|
||||
def __call__(self, request, client_address, server):
|
||||
return ControlHandler(request, client_address, server, self.cpu)
|
||||
|
||||
|
||||
class CPU:
|
||||
@ -419,11 +484,7 @@ class CPU:
|
||||
def __init__(self, memory):
|
||||
self.memory = memory
|
||||
|
||||
self.control_listener = socket.socket()
|
||||
self.control_listener.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, True)
|
||||
self.control_listener.bind(("127.0.0.1", 6502))
|
||||
self.control_listener.listen(1)
|
||||
self.control = []
|
||||
self.control_server = BaseHTTPServer.HTTPServer(("127.0.0.1", 6502), ControlHandlerFactory(self))
|
||||
|
||||
self.accumulator = 0x00
|
||||
self.x_index = 0x00
|
||||
@ -613,14 +674,17 @@ class CPU:
|
||||
timeout = 0
|
||||
if not self.running:
|
||||
timeout = 1
|
||||
sockets = [self.control_listener] + self.control
|
||||
# Currently this handler blocks from the moment
|
||||
# a connection is accepted until the response
|
||||
# is sent. TODO: use an async HTTP server that
|
||||
# handles input data asynchronously.
|
||||
sockets = [self.control_server]
|
||||
rs, _, _ = select.select(sockets, [], [], timeout)
|
||||
for s in rs:
|
||||
if s is self.control_listener:
|
||||
cs, _ = self.control_listener.accept()
|
||||
self.control.append(ControlHandler(self, cs))
|
||||
if s is self.control_server:
|
||||
self.control_server._handle_request_noblock()
|
||||
else:
|
||||
s.handle_read()
|
||||
pass
|
||||
|
||||
count = 1000
|
||||
while count > 0 and self.running:
|
||||
|
||||
Loading…
Reference in New Issue
Block a user