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# 8-bit bianry Watch

1. How do I convert numbers to signed 8-bit binary?
Will the value be the same, if it was signed or unsigned?

For example, I've got the number 22 as 00010110, but that's in unsigned 8-bit binary, would it be the same for signed 8-bit binary?
2. 'Unsigned can hold a larger positive value, and no negative value. Unsigned uses the leading bit as a part of the value, while the signed version uses the left-most-bit to identify if the number is positive or negative. Signed integers can hold both positive and negative numbers.'

Do you study computing at A-level at all? In my Computing course we learn two ways to give a binary integer a sign; 2's compliment and sign and magnitude. I'm not sure if there are more standard ways (I'm not at uni yet!), but these are two methods I know that are used to represent negative and positive numbers in binary.

For an 8 bit byte, with 2's compliment...

-22

For an 8 bit byte, with sign and magnitude...

-22

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3. (Original post by Me123456789)
How do I convert numbers to signed 8-bit binary?
Will the value be the same, if it was signed or unsigned?

For example, I've got the number 22 as 00010110, but that's in unsigned 8-bit binary, would it be the same for signed 8-bit binary?
That would be the same since it is not negative. If it was a negative number we use the eighth bit as a sign. We set it to 1 for negative and 0 for positive. The number is then written normally. As you can imagine this reduces the number of numbers we can represent since we waste the eighth bit as a sign.
That would be the same since it is not negative. If it was a negative number we use the eighth bit as a sign. We set it to 1 for negative and 0 for positive. The number is then written normally. As you can imagine this reduces the number of numbers we can represent since we waste the eighth bit as a sign.
Thank you
5. (Original post by Me123456789)
Thank you
No problem. Absolutely love the Profile picture/avatar btw xD
6. (Original post by sophiebookley)
'Unsigned can hold a larger positive value, and no negative value. Unsigned uses the leading bit as a part of the value, while the signed version uses the left-most-bit to identify if the number is positive or negative. Signed integers can hold both positive and negative numbers.'

Do you study computing at A-level at all? In my Computing course we learn two ways to give a binary integer a sign; 2's compliment and sign and magnitude. I'm not sure if there are more standard ways (I'm not at uni yet!), but these are two methods I know that are used to represent negative and positive numbers in binary.
Thank you

I never did it at A-level, but I'm doing it at university now.
7. (Original post by Me123456789)
Thank you

I never did it at A-level, but I'm doing it at university now.
Oh wow! I hope you're enjoying it, hopefully I'll be in the same position in September!
8. (Original post by sophiebookley)
Oh wow! I hope you're enjoying it, hopefully I'll be in the same position in September!
It is quite good actually I did struggle with it though
Ooh, you're doing cs? Where are you going?

No problem. Absolutely love the Profile picture/avatar btw xD
]

I don't know if you do this in your A-level but do any of you know how to evaluate the following expression
R2C = M2C – D2C
9. (Original post by Me123456789)
It is quite good actually I did struggle with it though
Ooh, you're doing cs? Where are you going?

]

I don't know if you do this in your A-level but do any of you know how to evaluate the following expression
R2C = M2C – D2C
Afraid not, what topic is this?
Afraid not, what topic is this?
I got it now

It was data representation, two's complement
11. (Original post by Me123456789)
I got it now

It was data representation, two's complement
o.0 we do two's complement but I've never seen R2C and all that :/ ? I've only seen it in relation to Binary?
o.0 we do two's complement but I've never seen R2C and all that :/ ? I've only seen it in relation to Binary?
Yeah it's still about the 8-bit binary stuff but I had to use two's complement
If that makes sense...
13. (Original post by Me123456789)
Yeah it's still about the 8-bit binary stuff but I had to use two's complement
If that makes sense...
o.0
So what exactly does this mean?
R2C = M2C – D2C
Sorry I'm very curious XD

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