92 lines
1.9 KiB
Python
92 lines
1.9 KiB
Python
# ApplePy - an Apple ][ emulator in Python
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# James Tauber / http://jtauber.com/
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# originally written 2001, updated 2011
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import curses
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import struct
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import subprocess
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import sys
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kbd = 0
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def write_screen(win, address, value):
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base = address - 0x400
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hi, lo = divmod(base, 0x80)
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row_group, column = divmod(lo, 0x28)
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row = hi + 8 * row_group
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# skip if writing to row group 3
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if row_group == 3:
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return
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c = chr(0x20 + ((value + 0x20) % 0x40))
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if value < 0x40:
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attr = curses.A_DIM
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elif value < 0x80:
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attr = curses.A_REVERSE
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elif value < 0xA0:
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attr = curses.A_UNDERLINE
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else:
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attr = curses.A_DIM
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try:
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win.addch(row, column, c, attr)
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except curses.error:
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pass
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def read(addr, val):
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global kbd
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if addr == 0xC000:
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return kbd
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elif addr == 0xC010:
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kbd = kbd & 0x7F
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return 0x00
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def write(win, addr, val):
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if 0x400 <= addr <= 0x800:
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write_screen(win, addr, val)
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def run(win):
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global kbd
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p = subprocess.Popen(
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args=[sys.executable, "cpu6502.py"],
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stdin=subprocess.PIPE,
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stdout=subprocess.PIPE,
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)
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win.clear()
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curses.noecho()
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win.nodelay(True)
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while True:
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op = p.stdout.read(8)
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cycle, rw, addr, val = struct.unpack("<IBHB", op)
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if rw == 0:
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p.stdin.write(chr(read(addr, val)))
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p.stdin.flush()
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elif rw == 1:
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write(win, addr, val)
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else:
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break
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try:
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key = ord(win.getkey())
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if key == 0xA:
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key = 0xD
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elif key == 0x7F:
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key = 0x8
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# win.addstr(15, 50, hex(key))
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kbd = 0x80 | key
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except curses.error:
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pass
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except TypeError:
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pass
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if __name__ == "__main__":
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curses.wrapper(run)
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