dev-cpp-users

[Dev-C++] assembly code in c

[Ben M. <ili...@at...>]

Ok, so i have a dilemma. I want to link assembler code to my C program 
that will print a line pointed to by a char *. the function is defined 
in my program as: extern void print_string (char *); and the assembly 
code is:

_print_string proc near

    PUSH BP

    MOV BP,SP

    MOV AH,09h
    MOV DX,OFFSET [BP+4]
    INT 21h

    POP BP

    RETN

_print_string endp

can anyone tell me why this is failing? I am trying to get the address 
off of the stack and then use it to access the string. What is the 
appropriate way to do this?

Re: [Dev-C++] assembly code in c

[Per W. <pw...@ia...>]

Why do you assume that it should work?

The BIOS operations where defined for 16-bit MS-Dos. Dev-C++ generates
code for running in protected-mode.

Switch to a free edition of an old Borland C compiler if you want to write
16-bit applications that makes use of BIOS functions.

Or take a look at DJGPP, a gcc port with a DOS-extender, that will
simulate compatibility with 16-bit interfaces.

/pwm

On Wed, 16 Jul 2008, Ben Melikant wrote:

> Ok, so i have a dilemma. I want to link assembler code to my C program
> that will print a line pointed to by a char *. the function is defined
> in my program as: extern void print_string (char *); and the assembly
> code is:
>
> _print_string proc near
>
>     PUSH BP
>
>     MOV BP,SP
>
>     MOV AH,09h
>     MOV DX,OFFSET [BP+4]
>     INT 21h
>
>     POP BP
>
>     RETN
>
> _print_string endp
>
> can anyone tell me why this is failing? I am trying to get the address
> off of the stack and then use it to access the string. What is the
> appropriate way to do this?
>
>
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