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  Discount, Burberry Smet T-shirts, COOGI G-star BBC jeans wholesale         


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Date: May 3, 2008 04:55

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  very sex girls pics         


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Date: May 3, 2008 04:35

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  You get good spells and you get bad spells whoever you are.-easy way to learn english         


Author: worldforever.suji
Date: May 3, 2008 02:40

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2 Comments
  Why 'pop' and not 'pull' the complementary action to 'push' for a stack         


Author: James Harris
Date: May 3, 2008 00:35

As in the subject field, since we "push" data on to a stack why did
the word "pop" come to be used for getting data back rather than
"pull." I found a previous entry on this NG about the original machine
that used the terms but, whether it is correct or not, it doesn't
cover /why/ 'pop' is used.

<http://groups.google.co.uk/group/alt.folklore.computers/browse_frm/
thread/93fd578be8dfb8dc/9f25d614f939509b?hl=en&lnk=gst&q=stack
+pop#9f25d614f939509b>

IIRC Chuck Peddle's 6502 assembler language specified Push and Pull
for the machine stack but that's the only time I have come across Pull
being used for a stack. Maybe there are others. At any rate why do we
use Pop???

In fact, here's a link to the 6502 instruction set

<http://e-tradition.net/bytes/6502/6502_instruction_set.html>

showing the commands such as

PHA - Push accumulator
PLA - Pull accumulator

--
103 Comments