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26
votes
3answers
3k views

Why might it be difficult to make a 64 bit version of a program?

In my short time programming, it has been trivial to compile any of my C++, Java, etc. for either a 32 or 64 bit machine so long as I have the full source for the program. But a lot of software is ...
1
vote
0answers
1k views

Accessing a 32-bit DLL from a 64-bit process

I'm aware that it's not possible to load a 32-bit DLL into a 64-bit process. The DLL in question is a ODBC driver which is no longer supported (although it works fine) and no 64-bit version of it ...
0
votes
7answers
437 views

Developing only for 64 bit servers a bad idea?

In an attempt to solve one problem I encountered another. I would like to have an easy and memorable way of creating unique error numbers, across projects and across developers. The scheme I came up ...
1
vote
2answers
137 views

Importance of uniformity of development architecture across the team

If some developers still use a 32 bit 'Windows XP' and others use a '64 bit Windows 7', would it be advisable for the entire team to work with 32 bit development tools even if their OS is 64 bit? Are ...
5
votes
1answer
643 views

Why do some software packages have an “amd64” suffix for 64-bit systems?

When downloading various software packages, and executables for Windows, I always see two different types of executables to download. One just says ...32-bit and the other always says ...amd64. I know ...
1
vote
2answers
503 views

Implementing base-10 floating point division

I'm implementing floating-point arithmetic, for a micro-controller which does not support floating point numbers, in either hardware or software. (Software being "written" in a sort of electrical ...
4
votes
3answers
11k views

Is there something special about the number 65535?

2¹⁶-1 & 2⁵ = 2⁵ (or? obviously ?) A developer asked me today what is bitwise 65535 & 32 i.e. 2¹⁶-1 & 2⁵ = ? I thought at first spontaneously 32 but it seemed to easy whereupon I thought ...
8
votes
3answers
298 views

Examples of limitations in IT due to different bit length by design [closed]

I am teaching the course "Introduction in Programming" for the first-year students and would like to find interesting examples where the datatype size in bits, chosen by design, led to certain known ...