Inline ASM ???????

Well is it good to learn inline assemble like what are the advantages????...And yeah if u guys can explain alil bit about the language assembly ..like i have heard about asm 86x80 something like that alil explanation will help... and yeah some good books on it ...like assembly for C programmers ...

DaIn

Well is it good to learn inline assemble like what are the advantages????...And yeah if u guys can explain alil bit about the language assembly ..like i have heard about asm 86x80 something like that alil explanation will help... and yeah some good books on it ...like assembly for C programmers ...

I guess it's good to learn if you wanna speed up your programs, but from what I've seen, all inline assembly does is give you quick access to the hardware if your operating system allows it. I think it's half voodoo and half luck, if you look at an assembly program then you'll understand what I mean. I don't know of any good books, I've only seen two different ones at the bookstore but I can't remember the names, try amazon.

Cheers!

http://webster.cs.ucr.edu/AoA.html
This book is good I think.

There are limited actual uses for assembly. The real
reason why most be program in it is too learn about
hardware/compilers/operating systems and then you might
be able to get better performance than the compiler.

There are limited actual uses for assembly. The real
reason why most be program in it is too learn about
hardware/compilers/operating systems and then you might
be able to get better performance than the compiler.

Question - When writing an operating system, isn't it required that stuff like the boot loader has to be written in assembly? Or can it be written in optimized C and still work?

Cheers!

I've never programmed an os before But the boot loader
on intel systems must be programmed in assembly because
you have to fiddle with the bios interupts and the system
starts up in 16 bit. Once the boot up is done then there's
special intel instructions that you would use for task switching etc. If you look at the code for linux -- most of it's c.

Writing code is the easy part. Other than for performance, callbacks, and esoterics with the O/S, the other useful place to know assembly basics is when you're DEBUGGING.

Sometimes, it's important to know exactly what the CPU is getting, in order to be able to find a problem.