Hello!

A short generall question: Is it possible to compile a 32bit asm code into a object or so and include it in my 16bit borland c++ 3.1 dos compiler?

yes
and you can use 32bit instructions too, in 16 bit mode
for example db $66; stosb; means stosd
only a prefix is the difference
but in 32 bit mode, you have that prefix on the 16 bit instructions

my prob is that i have a asm code for my "vesa refresh rate tool" but it uses extended register which are not supported in borland c++ 3.1. inline asm

did i mention i am a asm noob?

well there is one more problem. It works with db 66h before instruction (i have been using it too under turbo pascal), but there are several problems:
1. don't forgat to check for 386+ processor
2. If you use constants (immediates), they must be extended to 32 bits:

16 bit code:
mov bx,3210h is ?? 10 32
mov ebx,76543210h is 66 ?? 10 32 54 76 (?? is same as in mov bx, i can't remember now)
so as you see, you also have to add two bytes of constant, so
you need
;mov ebx,765433210h
db 66h
mov bx,3210h
dw 7654h

you can also extend addressing to 32bit with 67h prefix but that is a little bigger problem.

havy stuff for me

okay.. lets say i want to do this:



how do i solve this if my compiler does not understand ecx?

The most common and troubles-free answers are:
1. Get new compiler... there are many free 32bit compilers.
2. Waste all these fake HLL compilers and use FASM for writing whole programs - beleave me this is not so awfully as it looks.
Actually the natural way of a programmer is:


Of course, there are exceptions - some of the programmers begin directly with compiled HLL, some of them never reach the FASM level...it is a matter of skills you know. Also, these days, the smartest one simply skip MASM level.

Regards.

i would if i could... but i have to go the hard way.

You can use FASM to assemble the VESA code, and link with your C project. A (IMHO better) solution would be getting the microsoft visual c++ 2003 toolkit (which is free), produce PE executables, and use a dos extender like WDOSX to have it run under dos.

no, i am bound to borland c++ 3.1

Another short question:

how can i print out the value of a register to dos screen?

John, every good man is deserving a chance.