[TechSyndrome]

For example:



As you can see, I have '1' (circled in red), left over. Because my aim is to get 8-bits for a two's complement question, do I just discard this? I just want to make sure that I am doing this the correct way. Would appreciate any help on this.

This post has been edited by TechSyndrome: 29 July 2012 - 08:26 AM

[sepp2k]

Yes, when performing arithmetic on fixed-width n-bit integers, you discard any bits that carry over to the n+1st bit.

In effect this means that arithmetic with n-bit (unsigned) integers is equivalent to regular arithmetic modulo 2ⁿ.

[TechSyndrome]

sepp2k, on 29 July 2012 - 08:56 AM, said:

Yes, when performing arithmetic on fixed-width n-bit integers, you discard any bits that carry over to the n+1st bit.

In effect this means that arithmetic with n-bit (unsigned) integers is equivalent to regular arithmetic modulo 2ⁿ.

Thank you. Appreciate it.

[cfoley]

Yup, that's right. The Z80 chip also has a carry flag which would be set in those circumstances. I assume modern processors have an equivalent.