mirror of
https://github.com/jtauber/applepy.git
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Merge branch 'master' into disk
This commit is contained in:
James Tauber
commit
81cc4f546b
13
applepy.py
13
applepy.py
@ -109,6 +109,10 @@ class Display:
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self.flash_time = time.time()
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self.flash_on = False
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self.flash_chars = [[0] * 0x400] * 2
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self.page = 1
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self.text = True
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self.colour = False
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self.chargen = []
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for c in self.characters:
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@ -488,6 +492,10 @@ class Apple2:
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args.extend([
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"--ram", options.ram,
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])
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if options.pc is not None:
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args.extend([
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"--pc", str(options.pc),
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])
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self.core = subprocess.Popen(args)
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rs, _, _ = select.select([listener], [], [], 2)
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@ -544,6 +552,7 @@ def usage():
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print >>sys.stderr, " -c, --cassette Cassette wav file to load"
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print >>sys.stderr, " -R, --rom ROM file to use (default A2ROM.BIN)"
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print >>sys.stderr, " -r, --ram RAM file to load (default none)"
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print >>sys.stderr, " -p, --pc Initial PC value"
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print >>sys.stderr, " -q, --quiet Quiet mode, no sounds (default sounds)"
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sys.exit(1)
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@ -554,6 +563,7 @@ def get_options():
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self.cassette = None
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self.rom = "A2ROM.BIN"
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self.ram = None
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self.pc = None
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self.quiet = False
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options = Options()
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@ -569,6 +579,9 @@ def get_options():
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elif sys.argv[a] in ("-r", "--ram"):
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a += 1
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options.ram = sys.argv[a]
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elif sys.argv[a] in ("-p", "--pc"):
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a += 1
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options.pc = int(sys.argv[a])
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elif sys.argv[a] in ("-q", "--quiet"):
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options.quiet = True
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else:
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157
control.py
Normal file
157
control.py
Normal file
@ -0,0 +1,157 @@
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import json
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import readline
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import sys
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import urllib
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URL_PREFIX = "http://localhost:6502"
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def get(url):
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return json.loads(urllib.urlopen(URL_PREFIX + url).read())
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def post(url, data=None):
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return urllib.urlopen(URL_PREFIX + url, json.dumps(data) if data is not None else "")
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def value(s):
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if s.startswith("$"):
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return int(s[1:], 16)
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if s.startswith("0x"):
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return int(s[2:], 16)
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return int(s)
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def format_disassemble(dis):
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r = "%04X- " % dis["address"]
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for i in range(3):
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if i < len(dis["bytes"]):
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r += "%02X " % dis["bytes"][i]
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else:
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r += " "
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r += " %s" % dis["mnemonic"]
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if "operand" in dis:
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r += " %-10s" % dis["operand"]
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if "memory" in dis:
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r += "[%04X] = %0*X" % tuple(dis["memory"])
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return r
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def cmd_disassemble(a):
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"""Disassemble"""
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if len(a) > 1:
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addr = value(a[1])
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else:
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status = get("/status")
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addr = status["program_counter"]
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disasm = get("/disassemble/%d" % addr)
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for d in disasm:
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print format_disassemble(d)
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def cmd_dump(a):
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"""Dump memory"""
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start = value(a[1])
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if len(a) > 2:
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end = value(a[2])
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else:
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end = start + 15
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data = get("/memory/%d-%d" % (start, end))
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addr = start & ~0xF
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while addr <= end:
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s = "%04X-" % addr
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for i in range(16):
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if start <= addr + i <= end:
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s += " %02X" % data[addr + i - start]
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else:
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s += " "
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s += " "
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for i in range(16):
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if start <= addr + i <= end:
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c = data[addr + i - start]
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# adjust for apple character set
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c &= 0x3f
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if c < 0x20:
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c += 0x40
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if 0x20 <= c < 0x7f:
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s += chr(c)
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else:
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s += "."
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else:
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s += " "
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print s
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addr += 16
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def cmd_help(a):
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"""Help commands"""
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if len(a) > 1:
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f = Commands.get(a[1])
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if f is not None:
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print f.__doc__
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else:
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print "Unknown command:", a[1]
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else:
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print "Commands:"
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for c in sorted(Commands):
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print " ", c
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def cmd_peek(a):
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"""Peek memory location"""
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addr = value(a[1])
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dump = get("/memory/%d" % addr)
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print "%04X: %02X" % (addr, dump[0])
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def cmd_poke(a):
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"""Poke memory location"""
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addr = value(a[1])
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val = value(a[2])
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post("/memory/%d" % addr, [val])
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def cmd_status(a):
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"""CPU status"""
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status = get("/status")
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print "A=%02X X=%02X Y=%02X S=%02X PC=%04X F=%c%c0%c%c%c%c%c" % (
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status["accumulator"],
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status["x_index"],
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status["y_index"],
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status["stack_pointer"],
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status["program_counter"],
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"N" if status["sign_flag"] else "n",
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"V" if status["overflow_flag"] else "v",
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"B" if status["break_flag"] else "b",
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"D" if status["decimal_mode_flag"] else "d",
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"I" if status["interrupt_disable_flag"] else "i",
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"Z" if status["zero_flag"] else "z",
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"C" if status["carry_flag"] else "c",
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)
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disasm = get("/disassemble/%d" % status["program_counter"])
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print format_disassemble(disasm[0])
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def cmd_quit(a):
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"""Quit"""
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sys.exit(0)
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def cmd_reset(a):
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"""Reset"""
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post("/reset")
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Commands = {
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"disassemble": cmd_disassemble,
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"dump": cmd_dump,
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"help": cmd_help,
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"peek": cmd_peek,
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"poke": cmd_poke,
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"status": cmd_status,
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"quit": cmd_quit,
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"reset": cmd_reset,
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}
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def main():
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print "ApplePy control console"
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while True:
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s = raw_input("6502> ")
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a = s.strip().split()
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f = Commands.get(a[0])
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if f is not None:
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f(a)
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else:
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print "Unknown command:", s
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if __name__ == "__main__":
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main()
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590
cpu6502.py
590
cpu6502.py
@ -3,6 +3,10 @@
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# originally written 2001, updated 2011
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import BaseHTTPServer
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import json
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import re
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import select
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import socket
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import struct
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import sys
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@ -116,214 +120,384 @@ class Disassemble:
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self.setup_ops()
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def setup_ops(self):
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self.ops = [None] * 0x100
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self.ops[0x00] = ("BRK", )
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self.ops[0x01] = ("ORA", self.indirect_x_mode)
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self.ops[0x05] = ("ORA", self.zero_page_mode)
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self.ops[0x06] = ("ASL", self.zero_page_mode)
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self.ops[0x08] = ("PHP", )
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self.ops[0x09] = ("ORA", self.immediate_mode)
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self.ops[0x0A] = ("ASL", )
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self.ops[0x0D] = ("ORA", self.absolute_mode)
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self.ops[0x0E] = ("ASL", self.absolute_mode)
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self.ops[0x10] = ("BPL", self.relative_mode)
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self.ops[0x11] = ("ORA", self.indirect_y_mode)
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self.ops[0x15] = ("ORA", self.zero_page_x_mode)
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self.ops[0x16] = ("ASL", self.zero_page_x_mode)
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self.ops[0x18] = ("CLC", )
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self.ops[0x19] = ("ORA", self.absolute_y_mode)
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self.ops[0x1D] = ("ORA", self.absolute_x_mode)
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self.ops[0x1E] = ("ASL", self.absolute_x_mode)
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self.ops[0x20] = ("JSR", self.absolute_mode)
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self.ops[0x21] = ("AND", self.indirect_x_mode)
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self.ops[0x24] = ("BIT", self.zero_page_mode)
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self.ops[0x25] = ("AND", self.zero_page_mode)
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self.ops[0x26] = ("ROL", self.zero_page_mode)
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self.ops[0x28] = ("PLP", )
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self.ops[0x29] = ("AND", self.immediate_mode)
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self.ops[0x2A] = ("ROL", )
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self.ops[0x2C] = ("BIT", self.absolute_mode)
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self.ops[0x2D] = ("AND", self.absolute_mode)
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self.ops[0x2E] = ("ROL", self.absolute_mode)
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self.ops[0x30] = ("BMI", self.relative_mode)
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self.ops[0x31] = ("AND", self.indirect_y_mode)
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self.ops[0x35] = ("AND", self.zero_page_x_mode)
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self.ops[0x36] = ("ROL", self.zero_page_x_mode)
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self.ops[0x38] = ("SEC", )
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self.ops[0x39] = ("AND", self.absolute_y_mode)
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self.ops[0x3D] = ("AND", self.absolute_x_mode)
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self.ops[0x3E] = ("ROL", self.absolute_x_mode)
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self.ops[0x40] = ("RTI", )
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self.ops[0x41] = ("EOR", self.indirect_x_mode)
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self.ops[0x45] = ("EOR", self.zero_page_mode)
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self.ops[0x46] = ("LSR", self.zero_page_mode)
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self.ops[0x48] = ("PHA", )
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self.ops[0x49] = ("EOR", self.immediate_mode)
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self.ops[0x4A] = ("LSR", )
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self.ops[0x4C] = ("JMP", self.absolute_mode)
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self.ops[0x4D] = ("EOR", self.absolute_mode)
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self.ops[0x4E] = ("LSR", self.absolute_mode)
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self.ops[0x50] = ("BVC", self.relative_mode)
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self.ops[0x51] = ("EOR", self.indirect_y_mode)
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self.ops[0x55] = ("EOR", self.zero_page_x_mode)
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self.ops[0x56] = ("LSR", self.zero_page_x_mode)
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self.ops[0x58] = ("CLI", )
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||||
self.ops[0x59] = ("EOR", self.absolute_y_mode)
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||||
self.ops[0x5D] = ("EOR", self.absolute_x_mode)
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self.ops[0x5E] = ("LSR", self.absolute_x_mode)
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||||
self.ops[0x60] = ("RTS", )
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||||
self.ops[0x61] = ("ADC", self.indirect_x_mode)
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self.ops[0x65] = ("ADC", self.zero_page_mode)
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||||
self.ops[0x66] = ("ROR", self.zero_page_mode)
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||||
self.ops[0x68] = ("PLA", )
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||||
self.ops[0x69] = ("ADC", self.immediate_mode)
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||||
self.ops[0x6A] = ("ROR", )
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||||
self.ops[0x6C] = ("JMP", self.indirect_mode)
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||||
self.ops[0x6D] = ("ADC", self.absolute_mode)
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||||
self.ops[0x6E] = ("ROR", self.absolute_mode)
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||||
self.ops[0x70] = ("BVS", self.relative_mode)
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||||
self.ops[0x71] = ("ADC", self.indirect_y_mode)
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||||
self.ops[0x75] = ("ADC", self.zero_page_x_mode)
|
||||
self.ops[0x76] = ("ROR", self.zero_page_x_mode)
|
||||
self.ops[0x78] = ("SEI", )
|
||||
self.ops[0x79] = ("ADC", self.absolute_y_mode)
|
||||
self.ops[0x7D] = ("ADC", self.absolute_x_mode)
|
||||
self.ops[0x7E] = ("ROR", self.absolute_x_mode)
|
||||
self.ops[0x81] = ("STA", self.indirect_x_mode)
|
||||
self.ops[0x84] = ("STY", self.zero_page_mode)
|
||||
self.ops[0x85] = ("STA", self.zero_page_mode)
|
||||
self.ops[0x86] = ("STX", self.zero_page_mode)
|
||||
self.ops[0x88] = ("DEY", )
|
||||
self.ops[0x8A] = ("TXA", )
|
||||
self.ops[0x8C] = ("STY", self.absolute_mode)
|
||||
self.ops[0x8D] = ("STA", self.absolute_mode)
|
||||
self.ops[0x8E] = ("STX", self.absolute_mode)
|
||||
self.ops[0x90] = ("BCC", self.relative_mode)
|
||||
self.ops[0x91] = ("STA", self.indirect_y_mode)
|
||||
self.ops[0x94] = ("STY", self.zero_page_x_mode)
|
||||
self.ops[0x95] = ("STA", self.zero_page_x_mode)
|
||||
self.ops[0x96] = ("STX", self.zero_page_y_mode)
|
||||
self.ops[0x98] = ("TYA", )
|
||||
self.ops[0x99] = ("STA", self.absolute_y_mode)
|
||||
self.ops[0x9A] = ("TXS", )
|
||||
self.ops[0x9D] = ("STA", self.absolute_x_mode)
|
||||
self.ops[0xA0] = ("LDY", self.immediate_mode)
|
||||
self.ops[0xA1] = ("LDA", self.indirect_x_mode)
|
||||
self.ops[0xA2] = ("LDX", self.immediate_mode)
|
||||
self.ops[0xA4] = ("LDY", self.zero_page_mode)
|
||||
self.ops[0xA5] = ("LDA", self.zero_page_mode)
|
||||
self.ops[0xA6] = ("LDX", self.zero_page_mode)
|
||||
self.ops[0xA8] = ("TAY", )
|
||||
self.ops[0xA9] = ("LDA", self.immediate_mode)
|
||||
self.ops[0xAA] = ("TAX", )
|
||||
self.ops[0xAC] = ("LDY", self.absolute_mode)
|
||||
self.ops[0xAD] = ("LDA", self.absolute_mode)
|
||||
self.ops[0xAE] = ("LDX", self.absolute_mode)
|
||||
self.ops[0xB0] = ("BCS", self.relative_mode)
|
||||
self.ops[0xB1] = ("LDA", self.indirect_y_mode)
|
||||
self.ops[0xB4] = ("LDY", self.zero_page_x_mode)
|
||||
self.ops[0xB5] = ("LDA", self.zero_page_x_mode)
|
||||
self.ops[0xB6] = ("LDX", self.zero_page_y_mode)
|
||||
self.ops[0xB8] = ("CLV", )
|
||||
self.ops[0xB9] = ("LDA", self.absolute_y_mode)
|
||||
self.ops[0xBA] = ("TSX", )
|
||||
self.ops[0xBC] = ("LDY", self.absolute_x_mode)
|
||||
self.ops[0xBD] = ("LDA", self.absolute_x_mode)
|
||||
self.ops[0xBE] = ("LDX", self.absolute_y_mode)
|
||||
self.ops[0xC0] = ("CPY", self.immediate_mode)
|
||||
self.ops[0xC1] = ("CMP", self.indirect_x_mode)
|
||||
self.ops[0xC4] = ("CPY", self.zero_page_mode)
|
||||
self.ops[0xC5] = ("CMP", self.zero_page_mode)
|
||||
self.ops[0xC6] = ("DEC", self.zero_page_mode)
|
||||
self.ops[0xC8] = ("INY", )
|
||||
self.ops[0xC9] = ("CMP", self.immediate_mode)
|
||||
self.ops[0xCA] = ("DEX", )
|
||||
self.ops[0xCC] = ("CPY", self.absolute_mode)
|
||||
self.ops[0xCD] = ("CMP", self.absolute_mode)
|
||||
self.ops[0xCE] = ("DEC", self.absolute_mode)
|
||||
self.ops[0xD0] = ("BNE", self.relative_mode)
|
||||
self.ops[0xD1] = ("CMP", self.indirect_y_mode)
|
||||
self.ops[0xD5] = ("CMP", self.zero_page_x_mode)
|
||||
self.ops[0xD6] = ("DEC", self.zero_page_x_mode)
|
||||
self.ops[0xD8] = ("CLD", )
|
||||
self.ops[0xD9] = ("CMP", self.absolute_y_mode)
|
||||
self.ops[0xDD] = ("CMP", self.absolute_x_mode)
|
||||
self.ops[0xDE] = ("DEC", self.absolute_x_mode)
|
||||
self.ops[0xE0] = ("CPX", self.immediate_mode)
|
||||
self.ops[0xE1] = ("SBC", self.indirect_x_mode)
|
||||
self.ops[0xE4] = ("CPX", self.zero_page_mode)
|
||||
self.ops[0xE5] = ("SBC", self.zero_page_mode)
|
||||
self.ops[0xE6] = ("INC", self.zero_page_mode)
|
||||
self.ops[0xE8] = ("INX", )
|
||||
self.ops[0xE9] = ("SBC", self.immediate_mode)
|
||||
self.ops[0xEA] = ("NOP", )
|
||||
self.ops[0xEC] = ("CPX", self.absolute_mode)
|
||||
self.ops[0xED] = ("SBC", self.absolute_mode)
|
||||
self.ops[0xEE] = ("INC", self.absolute_mode)
|
||||
self.ops[0xF0] = ("BEQ", self.relative_mode)
|
||||
self.ops[0xF1] = ("SBC", self.indirect_y_mode)
|
||||
self.ops[0xF5] = ("SBC", self.zero_page_x_mode)
|
||||
self.ops[0xF6] = ("INC", self.zero_page_x_mode)
|
||||
self.ops[0xF8] = ("SED", )
|
||||
self.ops[0xF9] = ("SBC", self.absolute_y_mode)
|
||||
self.ops[0xFD] = ("SBC", self.absolute_x_mode)
|
||||
self.ops[0xFE] = ("INC", self.absolute_x_mode)
|
||||
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)
|
||||
self.ops[0x06] = (2, "ASL", self.zero_page_mode)
|
||||
self.ops[0x08] = (1, "PHP", )
|
||||
self.ops[0x09] = (2, "ORA", self.immediate_mode)
|
||||
self.ops[0x0A] = (1, "ASL", )
|
||||
self.ops[0x0D] = (3, "ORA", self.absolute_mode)
|
||||
self.ops[0x0E] = (3, "ASL", self.absolute_mode)
|
||||
self.ops[0x10] = (2, "BPL", self.relative_mode)
|
||||
self.ops[0x11] = (2, "ORA", self.indirect_y_mode)
|
||||
self.ops[0x15] = (2, "ORA", self.zero_page_x_mode)
|
||||
self.ops[0x16] = (2, "ASL", self.zero_page_x_mode)
|
||||
self.ops[0x18] = (1, "CLC", )
|
||||
self.ops[0x19] = (3, "ORA", self.absolute_y_mode)
|
||||
self.ops[0x1D] = (3, "ORA", self.absolute_x_mode)
|
||||
self.ops[0x1E] = (3, "ASL", self.absolute_x_mode)
|
||||
self.ops[0x20] = (3, "JSR", self.absolute_mode)
|
||||
self.ops[0x21] = (2, "AND", self.indirect_x_mode)
|
||||
self.ops[0x24] = (2, "BIT", self.zero_page_mode)
|
||||
self.ops[0x25] = (2, "AND", self.zero_page_mode)
|
||||
self.ops[0x26] = (2, "ROL", self.zero_page_mode)
|
||||
self.ops[0x28] = (1, "PLP", )
|
||||
self.ops[0x29] = (2, "AND", self.immediate_mode)
|
||||
self.ops[0x2A] = (1, "ROL", )
|
||||
self.ops[0x2C] = (3, "BIT", self.absolute_mode)
|
||||
self.ops[0x2D] = (3, "AND", self.absolute_mode)
|
||||
self.ops[0x2E] = (3, "ROL", self.absolute_mode)
|
||||
self.ops[0x30] = (2, "BMI", self.relative_mode)
|
||||
self.ops[0x31] = (2, "AND", self.indirect_y_mode)
|
||||
self.ops[0x35] = (2, "AND", self.zero_page_x_mode)
|
||||
self.ops[0x36] = (2, "ROL", self.zero_page_x_mode)
|
||||
self.ops[0x38] = (1, "SEC", )
|
||||
self.ops[0x39] = (3, "AND", self.absolute_y_mode)
|
||||
self.ops[0x3D] = (3, "AND", self.absolute_x_mode)
|
||||
self.ops[0x3E] = (3, "ROL", self.absolute_x_mode)
|
||||
self.ops[0x40] = (1, "RTI", )
|
||||
self.ops[0x41] = (2, "EOR", self.indirect_x_mode)
|
||||
self.ops[0x45] = (2, "EOR", self.zero_page_mode)
|
||||
self.ops[0x46] = (2, "LSR", self.zero_page_mode)
|
||||
self.ops[0x48] = (1, "PHA", )
|
||||
self.ops[0x49] = (2, "EOR", self.immediate_mode)
|
||||
self.ops[0x4A] = (1, "LSR", )
|
||||
self.ops[0x4C] = (3, "JMP", self.absolute_mode)
|
||||
self.ops[0x4D] = (3, "EOR", self.absolute_mode)
|
||||
self.ops[0x4E] = (3, "LSR", self.absolute_mode)
|
||||
self.ops[0x50] = (2, "BVC", self.relative_mode)
|
||||
self.ops[0x51] = (2, "EOR", self.indirect_y_mode)
|
||||
self.ops[0x55] = (2, "EOR", self.zero_page_x_mode)
|
||||
self.ops[0x56] = (2, "LSR", self.zero_page_x_mode)
|
||||
self.ops[0x58] = (1, "CLI", )
|
||||
self.ops[0x59] = (3, "EOR", self.absolute_y_mode)
|
||||
self.ops[0x5D] = (3, "EOR", self.absolute_x_mode)
|
||||
self.ops[0x5E] = (3, "LSR", self.absolute_x_mode)
|
||||
self.ops[0x60] = (1, "RTS", )
|
||||
self.ops[0x61] = (2, "ADC", self.indirect_x_mode)
|
||||
self.ops[0x65] = (2, "ADC", self.zero_page_mode)
|
||||
self.ops[0x66] = (2, "ROR", self.zero_page_mode)
|
||||
self.ops[0x68] = (1, "PLA", )
|
||||
self.ops[0x69] = (2, "ADC", self.immediate_mode)
|
||||
self.ops[0x6A] = (1, "ROR", )
|
||||
self.ops[0x6C] = (3, "JMP", self.indirect_mode)
|
||||
self.ops[0x6D] = (3, "ADC", self.absolute_mode)
|
||||
self.ops[0x6E] = (3, "ROR", self.absolute_mode)
|
||||
self.ops[0x70] = (2, "BVS", self.relative_mode)
|
||||
self.ops[0x71] = (2, "ADC", self.indirect_y_mode)
|
||||
self.ops[0x75] = (2, "ADC", self.zero_page_x_mode)
|
||||
self.ops[0x76] = (2, "ROR", self.zero_page_x_mode)
|
||||
self.ops[0x78] = (1, "SEI", )
|
||||
self.ops[0x79] = (3, "ADC", self.absolute_y_mode)
|
||||
self.ops[0x7D] = (3, "ADC", self.absolute_x_mode)
|
||||
self.ops[0x7E] = (3, "ROR", self.absolute_x_mode)
|
||||
self.ops[0x81] = (2, "STA", self.indirect_x_mode)
|
||||
self.ops[0x84] = (2, "STY", self.zero_page_mode)
|
||||
self.ops[0x85] = (2, "STA", self.zero_page_mode)
|
||||
self.ops[0x86] = (2, "STX", self.zero_page_mode)
|
||||
self.ops[0x88] = (1, "DEY", )
|
||||
self.ops[0x8A] = (1, "TXA", )
|
||||
self.ops[0x8C] = (3, "STY", self.absolute_mode)
|
||||
self.ops[0x8D] = (3, "STA", self.absolute_mode)
|
||||
self.ops[0x8E] = (3, "STX", self.absolute_mode)
|
||||
self.ops[0x90] = (2, "BCC", self.relative_mode)
|
||||
self.ops[0x91] = (2, "STA", self.indirect_y_mode)
|
||||
self.ops[0x94] = (2, "STY", self.zero_page_x_mode)
|
||||
self.ops[0x95] = (2, "STA", self.zero_page_x_mode)
|
||||
self.ops[0x96] = (2, "STX", self.zero_page_y_mode)
|
||||
self.ops[0x98] = (1, "TYA", )
|
||||
self.ops[0x99] = (3, "STA", self.absolute_y_mode)
|
||||
self.ops[0x9A] = (1, "TXS", )
|
||||
self.ops[0x9D] = (3, "STA", self.absolute_x_mode)
|
||||
self.ops[0xA0] = (2, "LDY", self.immediate_mode)
|
||||
self.ops[0xA1] = (2, "LDA", self.indirect_x_mode)
|
||||
self.ops[0xA2] = (2, "LDX", self.immediate_mode)
|
||||
self.ops[0xA4] = (2, "LDY", self.zero_page_mode)
|
||||
self.ops[0xA5] = (2, "LDA", self.zero_page_mode)
|
||||
self.ops[0xA6] = (2, "LDX", self.zero_page_mode)
|
||||
self.ops[0xA8] = (1, "TAY", )
|
||||
self.ops[0xA9] = (2, "LDA", self.immediate_mode)
|
||||
self.ops[0xAA] = (1, "TAX", )
|
||||
self.ops[0xAC] = (3, "LDY", self.absolute_mode)
|
||||
self.ops[0xAD] = (3, "LDA", self.absolute_mode)
|
||||
self.ops[0xAE] = (3, "LDX", self.absolute_mode)
|
||||
self.ops[0xB0] = (2, "BCS", self.relative_mode)
|
||||
self.ops[0xB1] = (2, "LDA", self.indirect_y_mode)
|
||||
self.ops[0xB4] = (2, "LDY", self.zero_page_x_mode)
|
||||
self.ops[0xB5] = (2, "LDA", self.zero_page_x_mode)
|
||||
self.ops[0xB6] = (2, "LDX", self.zero_page_y_mode)
|
||||
self.ops[0xB8] = (1, "CLV", )
|
||||
self.ops[0xB9] = (3, "LDA", self.absolute_y_mode)
|
||||
self.ops[0xBA] = (1, "TSX", )
|
||||
self.ops[0xBC] = (3, "LDY", self.absolute_x_mode)
|
||||
self.ops[0xBD] = (3, "LDA", self.absolute_x_mode)
|
||||
self.ops[0xBE] = (3, "LDX", self.absolute_y_mode)
|
||||
self.ops[0xC0] = (2, "CPY", self.immediate_mode)
|
||||
self.ops[0xC1] = (2, "CMP", self.indirect_x_mode)
|
||||
self.ops[0xC4] = (2, "CPY", self.zero_page_mode)
|
||||
self.ops[0xC5] = (2, "CMP", self.zero_page_mode)
|
||||
self.ops[0xC6] = (2, "DEC", self.zero_page_mode)
|
||||
self.ops[0xC8] = (1, "INY", )
|
||||
self.ops[0xC9] = (2, "CMP", self.immediate_mode)
|
||||
self.ops[0xCA] = (1, "DEX", )
|
||||
self.ops[0xCC] = (3, "CPY", self.absolute_mode)
|
||||
self.ops[0xCD] = (3, "CMP", self.absolute_mode)
|
||||
self.ops[0xCE] = (3, "DEC", self.absolute_mode)
|
||||
self.ops[0xD0] = (2, "BNE", self.relative_mode)
|
||||
self.ops[0xD1] = (2, "CMP", self.indirect_y_mode)
|
||||
self.ops[0xD5] = (2, "CMP", self.zero_page_x_mode)
|
||||
self.ops[0xD6] = (2, "DEC", self.zero_page_x_mode)
|
||||
self.ops[0xD8] = (1, "CLD", )
|
||||
self.ops[0xD9] = (3, "CMP", self.absolute_y_mode)
|
||||
self.ops[0xDD] = (3, "CMP", self.absolute_x_mode)
|
||||
self.ops[0xDE] = (3, "DEC", self.absolute_x_mode)
|
||||
self.ops[0xE0] = (2, "CPX", self.immediate_mode)
|
||||
self.ops[0xE1] = (2, "SBC", self.indirect_x_mode)
|
||||
self.ops[0xE4] = (2, "CPX", self.zero_page_mode)
|
||||
self.ops[0xE5] = (2, "SBC", self.zero_page_mode)
|
||||
self.ops[0xE6] = (2, "INC", self.zero_page_mode)
|
||||
self.ops[0xE8] = (1, "INX", )
|
||||
self.ops[0xE9] = (2, "SBC", self.immediate_mode)
|
||||
self.ops[0xEA] = (1, "NOP", )
|
||||
self.ops[0xEC] = (3, "CPX", self.absolute_mode)
|
||||
self.ops[0xED] = (3, "SBC", self.absolute_mode)
|
||||
self.ops[0xEE] = (3, "INC", self.absolute_mode)
|
||||
self.ops[0xF0] = (2, "BEQ", self.relative_mode)
|
||||
self.ops[0xF1] = (2, "SBC", self.indirect_y_mode)
|
||||
self.ops[0xF5] = (2, "SBC", self.zero_page_x_mode)
|
||||
self.ops[0xF6] = (2, "INC", self.zero_page_x_mode)
|
||||
self.ops[0xF8] = (1, "SED", )
|
||||
self.ops[0xF9] = (3, "SBC", self.absolute_y_mode)
|
||||
self.ops[0xFD] = (3, "SBC", self.absolute_x_mode)
|
||||
self.ops[0xFE] = (3, "INC", self.absolute_x_mode)
|
||||
|
||||
def absolute_mode(self, pc):
|
||||
a = self.memory.read_word(pc + 1)
|
||||
return "$%04X [%04X] = %02X" % (a, a, self.memory.read_word(a))
|
||||
a = self.cpu.read_word(pc + 1)
|
||||
return {
|
||||
"operand": "$%04X" % a,
|
||||
"memory": [a, 2, self.cpu.read_word(a)],
|
||||
}
|
||||
|
||||
def absolute_x_mode(self, pc):
|
||||
a = self.memory.read_word(pc + 1)
|
||||
a = self.cpu.read_word(pc + 1)
|
||||
e = a + self.cpu.x_index
|
||||
return "$%04X,X [%04X] = %02X" % (a, e, self.memory.read_byte(e))
|
||||
return {
|
||||
"operand": "$%04X,X" % a,
|
||||
"memory": [e, 1, self.cpu.read_byte(e)],
|
||||
}
|
||||
|
||||
def absolute_y_mode(self, pc):
|
||||
a = self.memory.read_word(pc + 1)
|
||||
a = self.cpu.read_word(pc + 1)
|
||||
e = a + self.cpu.y_index
|
||||
return "$%04X,Y [%04X] = %02X" % (a, e, self.memory.read_byte(e))
|
||||
return {
|
||||
"operand": "$%04X,Y" % a,
|
||||
"memory": [e, 1, self.cpu.read_byte(e)],
|
||||
}
|
||||
|
||||
def immediate_mode(self, pc):
|
||||
return "#$%02X" % (self.memory.read_byte(pc + 1))
|
||||
return {
|
||||
"operand": "#$%02X" % (self.cpu.read_byte(pc + 1)),
|
||||
}
|
||||
|
||||
def indirect_mode(self, pc):
|
||||
a = self.memory.read_word(pc + 1)
|
||||
return "($%04X) [%04X] = %02X" % (a, a, self.memory.read_word(a))
|
||||
a = self.cpu.read_word(pc + 1)
|
||||
return {
|
||||
"operand": "($%04X)" % a,
|
||||
"memory": [a, 2, self.cpu.read_word(a)],
|
||||
}
|
||||
|
||||
def indirect_x_mode(self, pc):
|
||||
z = self.memory.read_byte(pc + 1)
|
||||
a = self.memory.read_word((z + self.cpu.x_index) % 0x100)
|
||||
return "($%02X,X) [%04X] = %02X" % (z, a, self.memory.read_byte(a))
|
||||
z = self.cpu.read_byte(pc + 1)
|
||||
a = self.cpu.read_word((z + self.cpu.x_index) % 0x100)
|
||||
return {
|
||||
"operand": "($%02X,X)" % z,
|
||||
"memory": [a, 1, self.cpu.read_byte(a)],
|
||||
}
|
||||
|
||||
def indirect_y_mode(self, pc):
|
||||
z = self.memory.read_byte(pc + 1)
|
||||
a = self.memory.read_word(z) + self.cpu.y_index
|
||||
return "($%02X),Y [%04X] = %02X" % (z, a, self.memory.read_byte(a))
|
||||
z = self.cpu.read_byte(pc + 1)
|
||||
a = self.cpu.read_word(z) + self.cpu.y_index
|
||||
return {
|
||||
"operand": "($%02X),Y" % z,
|
||||
"memory": [a, 1, self.cpu.read_byte(a)],
|
||||
}
|
||||
|
||||
def relative_mode(self, pc):
|
||||
return "$%04X" % (pc + signed(self.memory.read_byte(pc + 1) + 2))
|
||||
return {
|
||||
"operand": "$%04X" % (pc + signed(self.cpu.read_byte(pc + 1) + 2)),
|
||||
}
|
||||
|
||||
def zero_page_mode(self, pc):
|
||||
a = self.memory.read_byte(pc + 1)
|
||||
return "$%02X [%04X] = %02X" % (a, a, self.memory.read_byte(a))
|
||||
a = self.cpu.read_byte(pc + 1)
|
||||
return {
|
||||
"operand": "$%02X" % a,
|
||||
"memory": [a, 1, self.cpu.read_byte(a)],
|
||||
}
|
||||
|
||||
def zero_page_x_mode(self, pc):
|
||||
z = self.memory.read_byte(pc + 1)
|
||||
z = self.cpu.read_byte(pc + 1)
|
||||
a = (z + self.cpu.x_index) % 0x100
|
||||
return "$%02X,X [%04X] = %02X" % (z, a, self.memory.read_byte(a))
|
||||
return {
|
||||
"operand": "$%02X,X" % z,
|
||||
"memory": [a, 1, self.cpu.read_byte(a)],
|
||||
}
|
||||
|
||||
def zero_page_y_mode(self, pc):
|
||||
z = self.memory.read_byte(pc + 1)
|
||||
z = self.cpu.read_byte(pc + 1)
|
||||
a = (z + self.cpu.y_index) % 0x100
|
||||
return "$%02X,Y [%04X] = %02X" % (z, a, self.memory.read_byte(a))
|
||||
return {
|
||||
"operand": "$%02X,Y" % z,
|
||||
"memory": [a, 1, self.cpu.read_byte(a)],
|
||||
}
|
||||
|
||||
def disasm(self, pc):
|
||||
op = self.memory.read_byte(pc)
|
||||
op = self.cpu.read_byte(pc)
|
||||
info = self.ops[op]
|
||||
s = "%02X %s" % (pc, info[0])
|
||||
if len(info) > 1:
|
||||
s += " " + info[1](pc)
|
||||
return s
|
||||
r = {
|
||||
"address": pc,
|
||||
"bytes": [self.cpu.read_byte(pc + i) for i in range(info[0])],
|
||||
"mnemonic": info[1],
|
||||
}
|
||||
if len(info) > 2:
|
||||
r.update(info[2](pc))
|
||||
return r, info[0]
|
||||
|
||||
|
||||
class ControlHandler(BaseHTTPServer.BaseHTTPRequestHandler):
|
||||
|
||||
def __init__(self, request, client_address, server, cpu):
|
||||
self.cpu = cpu
|
||||
self.disassemble = Disassemble(self.cpu, self.cpu.memory)
|
||||
|
||||
self.get_urls = {
|
||||
r"/disassemble/(\d+)$": self.get_disassemble,
|
||||
r"/memory/(\d+)(-(\d+))?$": self.get_memory,
|
||||
r"/memory/(\d+)(-(\d+))?/raw$": self.get_memory_raw,
|
||||
r"/status$": self.get_status,
|
||||
}
|
||||
|
||||
self.post_urls = {
|
||||
r"/memory/(\d+)(-(\d+))?$": self.post_memory,
|
||||
r"/memory/(\d+)(-(\d+))?/raw$": self.post_memory_raw,
|
||||
r"/quit$": self.post_quit,
|
||||
r"/reset$": self.post_reset,
|
||||
}
|
||||
|
||||
BaseHTTPServer.BaseHTTPRequestHandler.__init__(self, request, client_address, server)
|
||||
|
||||
def log_request(self, code, size=0):
|
||||
pass
|
||||
|
||||
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 response(self, s):
|
||||
self.send_response(200)
|
||||
self.send_header("Content-Length", str(len(s)))
|
||||
self.end_headers()
|
||||
self.wfile.write(s)
|
||||
|
||||
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_memory(self, m):
|
||||
addr = int(m.group(1))
|
||||
e = m.group(3)
|
||||
if e is not None:
|
||||
end = int(e)
|
||||
else:
|
||||
end = addr
|
||||
data = json.loads(self.rfile.read(int(self.headers["Content-Length"])))
|
||||
for i, a in enumerate(range(addr, end + 1)):
|
||||
self.cpu.write_byte(a, data[i])
|
||||
self.response("")
|
||||
|
||||
def post_memory_raw(self, m):
|
||||
addr = int(m.group(1))
|
||||
e = m.group(3)
|
||||
if e is not None:
|
||||
end = int(e)
|
||||
else:
|
||||
end = addr
|
||||
data = self.rfile.read(int(self.headers["Content-Length"]))
|
||||
for i, a in enumerate(range(addr, end + 1)):
|
||||
self.cpu.write_byte(a, data[i])
|
||||
self.response("")
|
||||
|
||||
def post_quit(self, m):
|
||||
self.cpu.quit = True
|
||||
self.response("")
|
||||
|
||||
def post_reset(self, m):
|
||||
self.cpu.reset()
|
||||
self.cpu.running = True
|
||||
self.response("")
|
||||
|
||||
|
||||
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:
|
||||
@ -331,9 +505,10 @@ class CPU:
|
||||
STACK_PAGE = 0x100
|
||||
RESET_VECTOR = 0xFFFC
|
||||
|
||||
def __init__(self, memory):
|
||||
def __init__(self, options, memory):
|
||||
self.memory = memory
|
||||
self.disassemble = Disassemble(self, memory)
|
||||
|
||||
self.control_server = BaseHTTPServer.HTTPServer(("127.0.0.1", 6502), ControlHandlerFactory(self))
|
||||
|
||||
self.accumulator = 0x00
|
||||
self.x_index = 0x00
|
||||
@ -353,6 +528,10 @@ class CPU:
|
||||
|
||||
self.setup_ops()
|
||||
self.reset()
|
||||
if options.pc is not None:
|
||||
self.program_counter = options.pc
|
||||
self.running = True
|
||||
self.quit = False
|
||||
|
||||
def setup_ops(self):
|
||||
self.ops = [None] * 0x100
|
||||
@ -515,17 +694,37 @@ class CPU:
|
||||
global bus
|
||||
bus = socket.socket()
|
||||
bus.connect(("127.0.0.1", bus_port))
|
||||
while True:
|
||||
self.cycles += 2 # all instructions take this as a minimum
|
||||
op = self.read_pc_byte()
|
||||
func = self.ops[op]
|
||||
if func is None:
|
||||
print "UNKNOWN OP"
|
||||
print hex(self.program_counter - 1)
|
||||
print hex(op)
|
||||
break
|
||||
else:
|
||||
self.ops[op]()
|
||||
|
||||
while not self.quit:
|
||||
|
||||
timeout = 0
|
||||
if not self.running:
|
||||
timeout = 1
|
||||
# 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_server:
|
||||
self.control_server._handle_request_noblock()
|
||||
else:
|
||||
pass
|
||||
|
||||
count = 1000
|
||||
while count > 0 and self.running:
|
||||
self.cycles += 2 # all instructions take this as a minimum
|
||||
op = self.read_pc_byte()
|
||||
func = self.ops[op]
|
||||
if func is None:
|
||||
print "UNKNOWN OP"
|
||||
print hex(self.program_counter - 1)
|
||||
print hex(op)
|
||||
break
|
||||
else:
|
||||
self.ops[op]()
|
||||
count -= 1
|
||||
|
||||
def test_run(self, start, end):
|
||||
self.program_counter = start
|
||||
@ -979,6 +1178,7 @@ def usage():
|
||||
print >>sys.stderr, "Usage: cpu6502.py [options]"
|
||||
print >>sys.stderr
|
||||
print >>sys.stderr, " -b, --bus Bus port number"
|
||||
print >>sys.stderr, " -p, --pc Initial PC value"
|
||||
print >>sys.stderr, " -R, --rom ROM file to use (default A2ROM.BIN)"
|
||||
print >>sys.stderr, " -r, --ram RAM file to load (default none)"
|
||||
sys.exit(1)
|
||||
@ -990,6 +1190,7 @@ def get_options():
|
||||
self.rom = "A2ROM.BIN"
|
||||
self.ram = None
|
||||
self.bus = None
|
||||
self.pc = None
|
||||
|
||||
options = Options()
|
||||
a = 1
|
||||
@ -998,6 +1199,9 @@ def get_options():
|
||||
if sys.argv[a] in ("-b", "--bus"):
|
||||
a += 1
|
||||
options.bus = int(sys.argv[a])
|
||||
elif sys.argv[a] in ("-p", "--pc"):
|
||||
a += 1
|
||||
options.pc = int(sys.argv[a])
|
||||
elif sys.argv[a] in ("-R", "--rom"):
|
||||
a += 1
|
||||
options.rom = sys.argv[a]
|
||||
@ -1022,5 +1226,5 @@ if __name__ == "__main__":
|
||||
|
||||
mem = Memory(options)
|
||||
|
||||
cpu = CPU(mem)
|
||||
cpu = CPU(options, mem)
|
||||
cpu.run(options.bus)
|
||||
|
||||
Loading…
Reference in New Issue
Block a user