ported to pygame and added bit-accurate characters
This commit is contained in:
James Tauber
parent
02714dff55
commit
9220ec85db
209
applepy.py
209
applepy.py
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@ -3,7 +3,8 @@
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# originally written 2001, updated 2011
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import curses
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import pygame
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def signed(x):
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if x > 0x7F:
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@ -11,6 +12,113 @@ def signed(x):
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return x
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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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def __init__(self):
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self.screen = pygame.display.set_mode((560, 432))
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pygame.display.set_caption("ApplePy")
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def update(self, 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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mode, ch = divmod(value, 0x40)
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if mode == 0: # inverse
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on = (0, 0, 0)
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off = (0, 200, 0)
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elif mode == 1: # flash
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on = (0, 0, 0)
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off = (0, 200, 0)
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else: # normal
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on = (0, 200, 0)
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off = (0, 0, 0)
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pixels = pygame.PixelArray(self.screen)
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for line in range(8):
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b = self.characters[ch][line]
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for i in range(5):
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x = 2 * (column * 7 + (5 - i))
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y = 2 * (row * 9 + line)
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bit = (b >> i) % 2
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pixels[x][y] = on if bit else off
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pixels[x + 1][y] = on if bit else off
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del pixels
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class RAM:
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def __init__(self, start, size):
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@ -63,7 +171,8 @@ class ROM:
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class Memory:
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def __init__(self):
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def __init__(self, display):
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self.display = display
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self.rom = ROM(0xD000, 0x3000)
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# available from http://www.easy68k.com/paulrsm/6502/index.html
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@ -93,33 +202,7 @@ class Memory:
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if address < 0xC000:
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self.ram.write_byte(address, value)
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if 0x400 <= address < 0x800:
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self.write_screen(address, value)
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def write_screen(self, 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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self.win.addch(row, column, c, attr)
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except curses.error:
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pass
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self.display.update(address, value)
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class Disassemble:
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@ -523,41 +606,13 @@ class CPU:
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def reset(self):
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self.program_counter = self.memory.read_word(self.RESET_VECTOR)
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def dump(self, win, op):
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win.move(10, 50)
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win.clrtoeol()
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win.addstr(10, 50, self.disassemble.disasm(self.program_counter - 1))
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win.addstr(14, 50, "BUFFER:" +
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" ".join("%02X" % self.memory.read_byte(m) for m in range(0x200, 0x210))
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)
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win.addstr(11, 50, "A=%02X X=%02X Y=%02X S=%02X V=%02X B=%02X D=%02X I=%02X Z=%02X C=%02X PC=%04X S=%02X" % (
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self.accumulator,
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self.x_index,
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self.y_index,
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self.sign_flag,
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self.overflow_flag,
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self.break_flag,
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self.decimal_mode_flag,
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self.interrupt_disable_flag,
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self.zero_flag,
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self.carry_flag,
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self.program_counter - 1,
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self.stack_pointer))
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win.addstr(12, 50, "STACK:" +
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" ".join("%02X" % self.memory.read_byte(self.STACK_PAGE + i) for i in range(255, self.stack_pointer, -1))
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)
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def run(self, win):
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self.memory.win = win
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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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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.read_pc_byte()
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# self.dump(win, op)
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func = self.ops[op]
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if func is None:
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curses.endwin()
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print "UNKNOWN OP"
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print hex(self.program_counter - 1)
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print hex(op)
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@ -565,18 +620,21 @@ class CPU:
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else:
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self.ops[op]()
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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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self.memory.softswitches.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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for event in pygame.event.get():
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if event.type == pygame.QUIT:
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quit = True
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if event.type == pygame.KEYDOWN:
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if event.unicode:
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key = ord(event.unicode)
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if key == 0x7F:
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key = 0x08
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self.memory.softswitches.kbd = 0x80 + key
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update_cycle += 1
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if update_cycle >= 1024:
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pygame.display.flip()
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update_cycle = 0
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####
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@ -959,7 +1017,8 @@ class CPU:
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if __name__ == "__main__":
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mem = Memory()
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display = Display()
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mem = Memory(display)
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cpu = CPU(mem)
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curses.wrapper(cpu.run)
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cpu.run()
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