i just started a computer architecture class. i feel really shaky on representing negative numbers in octal, hex and binary floating point. could you glance over my answers to see if i'm right? each question is worth a butt load of points, that's why im looking for someone to confirm the ones i'm iffy on. thanks a lot. i'm mostly not sure about doing negative numbers in hex or octal. i looked around online and some people just represented the absolute value of the number and then put a  sign infront of it. i didn't think that was correct, so i went in a twos compliment way about it.
3. Consider the following binary value: 1000 0000 0010 0110 0000 0110 1101 1001
What number (base 10) is represented if the value is assumed to represent a number stored in twos complement notation?
2144991527
Excess notation?
2492121
IEEE binary32 floatingpoint notation?
1.010011000000011011011001
4. How are values of 515 and 515 represented as ordinary binary numbers?
1000000011
0111111101
How are they represented as octal numbers?
1003
775
In hexadecimal numbers?
203
1FD
How are they represented in 16bit excess notation?
1000001000000011
0111110111111101
In 16bit twos complement notation?
0000001000000011
1111110111111101
5. How is the binary value 101101 x 2^(101101) represented in IEEE binary32 floatingpoint notation?
01010110100000000000000000101101
thanks a bunch
help with representing negative integers
Page 1 of 12 Replies  4546 Views  Last Post: 23 September 2012  08:28 PM
Replies To: help with representing negative integers
#2
Re: help with representing negative integers
Posted 23 September 2012  08:07 PM
If you've got time to ask us on the forum, then you've got time to try running things on a computer to see what the results are.
I say that not to be snarky, but to encourage to you to explore and experiment with a computer. Try putting in the values that you are coming up with see what happens. If you are on Windows, the built in Calculator has a pretty good Programmer mode that does various bases.
I say that not to be snarky, but to encourage to you to explore and experiment with a computer. Try putting in the values that you are coming up with see what happens. If you are on Windows, the built in Calculator has a pretty good Programmer mode that does various bases.
#3
Re: help with representing negative integers
Posted 23 September 2012  08:28 PM
Skydiver, on 24 September 2012  03:07 AM, said:
If you've got time to ask us on the forum, then you've got time to try running things on a computer to see what the results are.
I say that not to be snarky, but to encourage to you to explore and experiment with a computer. Try putting in the values that you are coming up with see what happens. If you are on Windows, the built in Calculator has a pretty good Programmer mode that does various bases.
I say that not to be snarky, but to encourage to you to explore and experiment with a computer. Try putting in the values that you are coming up with see what happens. If you are on Windows, the built in Calculator has a pretty good Programmer mode that does various bases.
oh cool, i've never seen the programmer mode for the calculator. thanks a bunch
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