495 lines
19 KiB
Python
Executable File
495 lines
19 KiB
Python
Executable File
#!/usr/bin/env python
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# 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 numpy
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import pygame
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import select
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import socket
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import struct
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import subprocess
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import sys
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import time
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import wave
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class Display:
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characters = [
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[0b00000, 0b01110, 0b10001, 0b10101, 0b10111, 0b10110, 0b10000, 0b01111],
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[0b00000, 0b00100, 0b01010, 0b10001, 0b10001, 0b11111, 0b10001, 0b10001],
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[0b00000, 0b11110, 0b10001, 0b10001, 0b11110, 0b10001, 0b10001, 0b11110],
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[0b00000, 0b01110, 0b10001, 0b10000, 0b10000, 0b10000, 0b10001, 0b01110],
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[0b00000, 0b11110, 0b10001, 0b10001, 0b10001, 0b10001, 0b10001, 0b11110],
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[0b00000, 0b11111, 0b10000, 0b10000, 0b11110, 0b10000, 0b10000, 0b11111],
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[0b00000, 0b11111, 0b10000, 0b10000, 0b11110, 0b10000, 0b10000, 0b10000],
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[0b00000, 0b01111, 0b10000, 0b10000, 0b10000, 0b10011, 0b10001, 0b01111],
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[0b00000, 0b10001, 0b10001, 0b10001, 0b11111, 0b10001, 0b10001, 0b10001],
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[0b00000, 0b01110, 0b00100, 0b00100, 0b00100, 0b00100, 0b00100, 0b01110],
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[0b00000, 0b00001, 0b00001, 0b00001, 0b00001, 0b00001, 0b10001, 0b01110],
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[0b00000, 0b10001, 0b10010, 0b10100, 0b11000, 0b10100, 0b10010, 0b10001],
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[0b00000, 0b10000, 0b10000, 0b10000, 0b10000, 0b10000, 0b10000, 0b11111],
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[0b00000, 0b10001, 0b11011, 0b10101, 0b10101, 0b10001, 0b10001, 0b10001],
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[0b00000, 0b10001, 0b10001, 0b11001, 0b10101, 0b10011, 0b10001, 0b10001],
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[0b00000, 0b01110, 0b10001, 0b10001, 0b10001, 0b10001, 0b10001, 0b01110],
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[0b00000, 0b11110, 0b10001, 0b10001, 0b11110, 0b10000, 0b10000, 0b10000],
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[0b00000, 0b01110, 0b10001, 0b10001, 0b10001, 0b10101, 0b10010, 0b01101],
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[0b00000, 0b11110, 0b10001, 0b10001, 0b11110, 0b10100, 0b10010, 0b10001],
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[0b00000, 0b01110, 0b10001, 0b10000, 0b01110, 0b00001, 0b10001, 0b01110],
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[0b00000, 0b11111, 0b00100, 0b00100, 0b00100, 0b00100, 0b00100, 0b00100],
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[0b00000, 0b10001, 0b10001, 0b10001, 0b10001, 0b10001, 0b10001, 0b01110],
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[0b00000, 0b10001, 0b10001, 0b10001, 0b10001, 0b10001, 0b01010, 0b00100],
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[0b00000, 0b10001, 0b10001, 0b10001, 0b10101, 0b10101, 0b11011, 0b10001],
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[0b00000, 0b10001, 0b10001, 0b01010, 0b00100, 0b01010, 0b10001, 0b10001],
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[0b00000, 0b10001, 0b10001, 0b01010, 0b00100, 0b00100, 0b00100, 0b00100],
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[0b00000, 0b11111, 0b00001, 0b00010, 0b00100, 0b01000, 0b10000, 0b11111],
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[0b00000, 0b11111, 0b11000, 0b11000, 0b11000, 0b11000, 0b11000, 0b11111],
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[0b00000, 0b00000, 0b10000, 0b01000, 0b00100, 0b00010, 0b00001, 0b00000],
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[0b00000, 0b11111, 0b00011, 0b00011, 0b00011, 0b00011, 0b00011, 0b11111],
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[0b00000, 0b00000, 0b00000, 0b00100, 0b01010, 0b10001, 0b00000, 0b00000],
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[0b00000, 0b00000, 0b00000, 0b00000, 0b00000, 0b00000, 0b00000, 0b11111],
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[0b00000, 0b00000, 0b00000, 0b00000, 0b00000, 0b00000, 0b00000, 0b00000],
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[0b00000, 0b00100, 0b00100, 0b00100, 0b00100, 0b00100, 0b00000, 0b00100],
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[0b00000, 0b01010, 0b01010, 0b00000, 0b00000, 0b00000, 0b00000, 0b00000],
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[0b00000, 0b01010, 0b01010, 0b11111, 0b01010, 0b11111, 0b01010, 0b01010],
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[0b00000, 0b00100, 0b01111, 0b10100, 0b01110, 0b00101, 0b11110, 0b00100],
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[0b00000, 0b11000, 0b11001, 0b00010, 0b00100, 0b01000, 0b10011, 0b00011],
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[0b00000, 0b01000, 0b10100, 0b10100, 0b01000, 0b10101, 0b10010, 0b01101],
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[0b00000, 0b00100, 0b00100, 0b00000, 0b00000, 0b00000, 0b00000, 0b00000],
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[0b00000, 0b00100, 0b01000, 0b10000, 0b10000, 0b10000, 0b01000, 0b00100],
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[0b00000, 0b00100, 0b00010, 0b00001, 0b00001, 0b00001, 0b00010, 0b00100],
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[0b00000, 0b00100, 0b10101, 0b01110, 0b00100, 0b01110, 0b10101, 0b00100],
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[0b00000, 0b00000, 0b00100, 0b00100, 0b11111, 0b00100, 0b00100, 0b00000],
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[0b00000, 0b00000, 0b00000, 0b00000, 0b00000, 0b00100, 0b00100, 0b01000],
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[0b00000, 0b00000, 0b00000, 0b00000, 0b11111, 0b00000, 0b00000, 0b00000],
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[0b00000, 0b00000, 0b00000, 0b00000, 0b00000, 0b00000, 0b00000, 0b00100],
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[0b00000, 0b00000, 0b00001, 0b00010, 0b00100, 0b01000, 0b10000, 0b00000],
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[0b00000, 0b01110, 0b10001, 0b10011, 0b10101, 0b11001, 0b10001, 0b01110],
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[0b00000, 0b00100, 0b01100, 0b00100, 0b00100, 0b00100, 0b00100, 0b01110],
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[0b00000, 0b01110, 0b10001, 0b00001, 0b00110, 0b01000, 0b10000, 0b11111],
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[0b00000, 0b11111, 0b00001, 0b00010, 0b00110, 0b00001, 0b10001, 0b01110],
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[0b00000, 0b00010, 0b00110, 0b01010, 0b10010, 0b11111, 0b00010, 0b00010],
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[0b00000, 0b11111, 0b10000, 0b11110, 0b00001, 0b00001, 0b10001, 0b01110],
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[0b00000, 0b00111, 0b01000, 0b10000, 0b11110, 0b10001, 0b10001, 0b01110],
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[0b00000, 0b11111, 0b00001, 0b00010, 0b00100, 0b01000, 0b01000, 0b01000],
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[0b00000, 0b01110, 0b10001, 0b10001, 0b01110, 0b10001, 0b10001, 0b01110],
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[0b00000, 0b01110, 0b10001, 0b10001, 0b01111, 0b00001, 0b00010, 0b11100],
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[0b00000, 0b00000, 0b00000, 0b00100, 0b00000, 0b00100, 0b00000, 0b00000],
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[0b00000, 0b00000, 0b00000, 0b00100, 0b00000, 0b00100, 0b00100, 0b01000],
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[0b00000, 0b00010, 0b00100, 0b01000, 0b10000, 0b01000, 0b00100, 0b00010],
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[0b00000, 0b00000, 0b00000, 0b11111, 0b00000, 0b11111, 0b00000, 0b00000],
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[0b00000, 0b01000, 0b00100, 0b00010, 0b00001, 0b00010, 0b00100, 0b01000],
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[0b00000, 0b01110, 0b10001, 0b00010, 0b00100, 0b00100, 0b00000, 0b00100]
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]
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lores_colours = [
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(0, 0, 0), # black
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(208, 0, 48), # magenta / dark red
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(0, 0, 128), # dark blue
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(255, 0, 255), # purple / violet
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(0, 128, 0), # dark green
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(128, 128, 128), # gray 1
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(0, 0, 255), # medium blue / blue
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(96, 160, 255), # light blue
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(128, 80, 0), # brown / dark orange
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(255, 128, 0), # orange
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(192, 192, 192), # gray 2
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(255, 144, 128), # pink / light red
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(0, 255, 0), # light green / green
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(255, 255, 0), # yellow / light orange
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(64, 255, 144), # aquamarine / light green
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(255, 255, 255), # white
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]
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def __init__(self):
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self.screen = pygame.display.set_mode((560, 384))
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pygame.display.set_caption("ApplePy")
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self.mix = False
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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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chars = [[pygame.Surface((14, 16)), pygame.Surface((14, 16))],
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[pygame.Surface((14, 16)), pygame.Surface((14, 16))]]
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for colour in (0, 1):
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hue = (255, 255, 255) if colour else (0, 200, 0)
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for inv in (0, 1):
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pixels = pygame.PixelArray(chars[colour][inv])
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off = hue if inv else (0, 0, 0)
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on = (0, 0, 0) if inv else hue
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for row in range(8):
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b = c[row] << 1
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for col in range(7):
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bit = (b >> (6 - col)) & 1
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pixels[2 * col][2 * row] = on if bit else off
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pixels[2 * col + 1][2 * row] = on if bit else off
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del pixels
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self.chargen.append(chars)
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def txtclr(self):
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self.text = False
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def txtset(self):
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self.text = True
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self.colour = False
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def mixclr(self):
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self.mix = False
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def mixset(self):
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self.mix = True
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self.colour = True
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def lowscr(self):
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self.page = 1
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def hiscr(self):
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self.page = 2
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def lores(self):
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self.high_res = False
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def hires(self):
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self.high_res = True
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def update(self, address, value):
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if self.page == 1:
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start_text = 0x400
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start_hires = 0x2000
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elif self.page == 2:
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start_text = 0x800
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start_hires = 0x4000
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else:
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return
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if start_text <= address <= start_text + 0x3FF:
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base = address - start_text
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self.flash_chars[self.page - 1][base] = value
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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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if row_group == 3:
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return
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if self.text or not self.mix or not row < 20:
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mode, ch = divmod(value, 0x40)
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if mode == 0:
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inv = True
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elif mode == 1:
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inv = self.flash_on
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else:
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inv = False
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self.screen.blit(self.chargen[ch][self.colour][inv], (2 * (column * 7), 2 * (row * 8)))
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else:
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pixels = pygame.PixelArray(self.screen)
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if not self.high_res:
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lower, upper = divmod(value, 0x10)
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for dx in range(14):
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for dy in range(8):
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x = column * 14 + dx
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y = row * 16 + dy
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pixels[x][y] = self.lores_colours[upper]
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for dy in range(8, 16):
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x = column * 14 + dx
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y = row * 16 + dy
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pixels[x][y] = self.lores_colours[lower]
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del pixels
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elif start_hires <= address <= start_hires + 0x1FFF:
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if self.high_res:
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base = address - start_hires
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row8, b = divmod(base, 0x400)
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hi, lo = divmod(b, 0x80)
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row_group, column = divmod(lo, 0x28)
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row = 8 * (hi + 8 * row_group) + row8
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if self.mix and row >= 160:
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return
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if row < 192 and column < 40:
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pixels = pygame.PixelArray(self.screen)
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msb = value // 0x80
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for b in range(7):
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c = value & (1 << b)
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xx = (column * 7 + b)
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x = 2 * xx
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y = 2 * row
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if msb:
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if xx % 2:
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pixels[x][y] = (0, 0, 0)
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# orange
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pixels[x][y] = (255, 192, 0) if c else (0, 0, 0) # @@@
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pixels[x + 1][y] = (255, 192, 0) if c else (0, 0, 0)
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else:
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# blue
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pixels[x][y] = (0, 192, 255) if c else (0, 0, 0)
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pixels[x + 1][y] = (0, 0, 0)
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pixels[x + 1][y] = (0, 192, 255) if c else (0, 0, 0) # @@@
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else:
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if xx % 2:
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pixels[x][y] = (0, 0, 0)
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# green
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pixels[x][y] = (0, 255, 0) if c else (0, 0, 0) # @@@
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pixels[x + 1][y] = (0, 255, 0) if c else (0, 0, 0)
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else:
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# violet
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pixels[x][y] = (255, 0, 255) if c else (0, 0, 0)
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pixels[x + 1][y] = (0, 0, 0)
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pixels[x + 1][y] = (255, 0, 255) if c else (0, 0, 0) # @@@
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pixels[x][y + 1] = (0, 0, 0)
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pixels[x + 1][y + 1] = (0, 0, 0)
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del pixels
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def flash(self):
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if time.time() - self.flash_time >= 0.5:
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self.flash_on = not self.flash_on
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for offset, char in enumerate(self.flash_chars[self.page - 1]):
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if (char & 0xC0) == 0x40:
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self.update(0x400 + offset, char)
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self.flash_time = time.time()
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class Speaker:
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CPU_CYCLES_PER_SAMPLE = 60
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CHECK_INTERVAL = 1000
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def __init__(self):
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pygame.mixer.pre_init(11025, -16, 1)
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pygame.init()
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self.reset()
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def toggle(self, cycle):
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if self.last_toggle is not None:
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l = (cycle - self.last_toggle) / Speaker.CPU_CYCLES_PER_SAMPLE
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self.buffer.extend([0, 26000] if self.polarity else [0, -2600])
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self.buffer.extend((l - 2) * [16384] if self.polarity else [-16384])
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self.polarity = not self.polarity
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self.last_toggle = cycle
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def reset(self):
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self.last_toggle = None
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self.buffer = []
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self.polarity = False
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def play(self):
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sample_array = numpy.int16(self.buffer)
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sound = pygame.sndarray.make_sound(sample_array)
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sound.play()
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self.reset()
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def update(self, cycle):
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if self.buffer and (cycle - self.last_toggle) > self.CHECK_INTERVAL:
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self.play()
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class Cassette:
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def __init__(self, fn):
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wav = wave.open(fn, "r")
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self.raw = wav.readframes(wav.getnframes())
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self.start_cycle = 0
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self.start_offset = 0
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for i, b in enumerate(self.raw):
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if ord(b) > 0xA0:
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self.start_offset = i
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break
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def read_byte(self, cycle):
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if self.start_cycle == 0:
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self.start_cycle = cycle
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offset = self.start_offset + (cycle - self.start_cycle) * 22000 / 1000000
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return ord(self.raw[offset]) if offset < len(self.raw) else 0x80
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class SoftSwitches:
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def __init__(self, display, speaker, cassette):
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self.kbd = 0x00
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self.display = display
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self.speaker = speaker
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self.cassette = cassette
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def read_byte(self, cycle, address):
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assert 0xC000 <= address <= 0xCFFF
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if address == 0xC000:
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return self.kbd
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elif address == 0xC010:
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self.kbd = self.kbd & 0x7F
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elif address == 0xC030:
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if self.speaker:
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self.speaker.toggle(cycle)
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elif address == 0xC050:
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self.display.txtclr()
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elif address == 0xC051:
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self.display.txtset()
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elif address == 0xC052:
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self.display.mixclr()
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elif address == 0xC053:
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self.display.mixset()
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elif address == 0xC054:
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self.display.lowscr()
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elif address == 0xC055:
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self.display.hiscr()
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elif address == 0xC056:
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self.display.lores()
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elif address == 0xC057:
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self.display.hires()
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elif address == 0xC060:
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if self.cassette:
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return self.cassette.read_byte(cycle)
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else:
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pass # print "%04X" % address
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return 0x00
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class Apple2:
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def __init__(self, options, display, speaker, cassette):
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self.display = display
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self.speaker = speaker
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self.softswitches = SoftSwitches(display, speaker, cassette)
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listener = socket.socket()
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listener.bind(("127.0.0.1", 0))
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listener.listen(0)
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args = [
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sys.executable,
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"cpu6502.py",
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"--bus", str(listener.getsockname()[1]),
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"--rom", options.rom,
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]
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if options.ram:
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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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if not rs:
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print >>sys.stderr, "CPU module did not start"
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sys.exit(1)
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self.cpu, _ = listener.accept()
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def run(self):
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update_cycle = 0
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quit = False
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while not quit:
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op = self.cpu.recv(8)
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if len(op) == 0:
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break
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cycle, rw, addr, val = struct.unpack("<IBHB", op)
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if rw == 0:
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self.cpu.send(chr(self.softswitches.read_byte(cycle, addr)))
|
|
elif rw == 1:
|
|
self.display.update(addr, val)
|
|
else:
|
|
break
|
|
|
|
for event in pygame.event.get():
|
|
if event.type == pygame.QUIT:
|
|
quit = True
|
|
|
|
if event.type == pygame.KEYDOWN:
|
|
key = ord(event.unicode) if event.unicode else 0
|
|
if event.key == pygame.K_LEFT:
|
|
key = 0x08
|
|
if event.key == pygame.K_RIGHT:
|
|
key = 0x15
|
|
if key:
|
|
if key == 0x7F:
|
|
key = 0x08
|
|
self.softswitches.kbd = 0x80 + (key & 0x7F)
|
|
|
|
update_cycle += 1
|
|
if update_cycle >= 1024:
|
|
self.display.flash()
|
|
pygame.display.flip()
|
|
if self.speaker:
|
|
self.speaker.update(cycle)
|
|
update_cycle = 0
|
|
|
|
|
|
def usage():
|
|
print >>sys.stderr, "ApplePy - an Apple ][ emulator in Python"
|
|
print >>sys.stderr, "James Tauber / http://jtauber.com/"
|
|
print >>sys.stderr
|
|
print >>sys.stderr, "Usage: applepy.py [options]"
|
|
print >>sys.stderr
|
|
print >>sys.stderr, " -c, --cassette Cassette wav file to load"
|
|
print >>sys.stderr, " -R, --rom ROM file to use (default A2ROM.BIN)"
|
|
print >>sys.stderr, " -r, --ram RAM file to load (default none)"
|
|
print >>sys.stderr, " -p, --pc Initial PC value"
|
|
print >>sys.stderr, " -q, --quiet Quiet mode, no sounds (default sounds)"
|
|
sys.exit(1)
|
|
|
|
|
|
def get_options():
|
|
class Options:
|
|
def __init__(self):
|
|
self.cassette = None
|
|
self.rom = "A2ROM.BIN"
|
|
self.ram = None
|
|
self.pc = None
|
|
self.quiet = False
|
|
|
|
options = Options()
|
|
a = 1
|
|
while a < len(sys.argv):
|
|
if sys.argv[a].startswith("-"):
|
|
if sys.argv[a] in ("-c", "--cassette"):
|
|
a += 1
|
|
options.cassette = sys.argv[a]
|
|
elif sys.argv[a] in ("-R", "--rom"):
|
|
a += 1
|
|
options.rom = sys.argv[a]
|
|
elif sys.argv[a] in ("-r", "--ram"):
|
|
a += 1
|
|
options.ram = sys.argv[a]
|
|
elif sys.argv[a] in ("-p", "--pc"):
|
|
a += 1
|
|
options.pc = int(sys.argv[a])
|
|
elif sys.argv[a] in ("-q", "--quiet"):
|
|
options.quiet = True
|
|
else:
|
|
usage()
|
|
else:
|
|
usage()
|
|
a += 1
|
|
|
|
return options
|
|
|
|
|
|
if __name__ == "__main__":
|
|
options = get_options()
|
|
display = Display()
|
|
speaker = None if options.quiet else Speaker()
|
|
cassette = Cassette(options.cassette) if options.cassette else None
|
|
|
|
apple = Apple2(options, display, speaker, cassette)
|
|
apple.run()
|