Apple-2-Tools/applepy
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simplified screen address to col/row translation based on code from 2006

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James Tauber 2011-08-06 17:43:59 -04:00
parent 80f221b0f5
commit 55d700fc68
1 changed files with 6 additions and 25 deletions
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31
applepy.py
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@ -41,29 +41,11 @@ class Memory:
return self.read_byte(address) + (self.read_byte(address + 1) << 8) return self.read_byte(address) + (self.read_byte(address + 1) << 8)
def write_screen(self, address, value): def write_screen(self, address, value):
address_hi, address_lo = divmod(address, 0x100) base = address - 0x400
hi, lo = divmod(base, 0x80)
if address_lo < 0x28: row_group, column = divmod(lo, 0x28)
a = 0x01 row = hi + 8 * row_group
b = 0x00 assert row_group != 3 # @@@
elif address_lo < 0x50:
a = 0x09
b = 0x28
elif address_lo < 0x80:
a = 0x11
b = 0x50
elif address_lo < 0xA8:
a = 0x02
b = 0x80
elif address_lo < 0xD0:
a = 0x0A
b = 0xA8
else:
a = 0x12
b = 0xD0
x = address_lo - b
y = 2 * (address_hi - 0x04) + a
c = chr(0x20 + ((value + 0x20) % 0x40)) c = chr(0x20 + ((value + 0x20) % 0x40))
@ -76,8 +58,7 @@ class Memory:
else: else:
attr = curses.A_DIM attr = curses.A_DIM
if x < 0x28: self.win.addch(row, column, c, attr)
self.win.addch(y, x, c, attr)
class CPU: class CPU: