A83: Unsquish joke
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A83: Unsquish joke
Hehe, I just checked the source code of the unsquish program recently posted
here... Let's see what it does:
xor b
This does not, as the programmer probably intended, clear register b. Doh!
Result: ldir might trash op2-op6 and beyond them. It might trash the whole
memory actually.
Before the realtime unsquish engine (c00l coding term, eh?), which
effectively _insertmems one byte at a time, you find two of the three
commented lines in the whole program. They are incorrect (as they say hl
instead of de).
Finally, instead of shifting the accumulator 4 times to the right to obtain
the most significant bits, this piece of contemporary art is used:
add a, 16
ld c, -1
unsquishdata:
inc c
add a, -16
cp 16
jp nc, unsquishdata
ld b, a
ld a, c
I know this was hacked together rather quickly, but you still would expect
it to perform its task _somewhat_ more efficient.
No offense. =)
Linus
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| Linus Akesson | http://fly.to/linus.world |
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After I cook the vegetables, what do I do with the wheelchairs?
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