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Mar 10th, 2008, 6:56 PM
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#1 |
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Hobbyist Programmer
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Location: Sydney - Australia
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Flag Question
Another question from me. Although I am a noob at assembly, I love learning it.
 My questions are:
Thanks in advance guys.
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SYNTAX ERROR ... |
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Mar 10th, 2008, 7:12 PM
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#2 |
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Expert Programmer
Join Date: Sep 2004
Location: Ontario, Canada
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Re: Flag Question
Flags are just a collection of bits that tell you different things about the current state of the processor. For example, if you do a byte addition and the result is greater than 255, then the carry flag will be set. The zero flag is also popular, to signify that the result of a computation is zero. The sign flag tells you if a number is interpreted as signed or unsigned. Most CPU's have atleast those three.
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Johnny was a chemist's son but Johnny is no more, for what Johnny thought was H2O was H2SO4 |
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Mar 10th, 2008, 8:06 PM
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#3 |
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Hobbyist Programmer
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Re: Flag Question
flags can be single bit registers, or memory mapped registers.
they are used in conditional operations. branch on negative/zero/positive
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i dont know much about programming but i try to help |
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