OpenEuphoria

Re: Compiler FREBASIC - OS Indepenent and Native Code

• Posted by Alexander Toresson <alexander.toresson at gmail.com> Jun 26, 2005
• 797 views

David Ragazzi wrote:
> 
> See the source code in ASM from main.bas.
> It prints on Screen "Hello, World!":
> 
> 
> 	.intel_syntax noprefix
> 	.arch i486
> 
> 	#'main.bas' compilation started at 08:30:58 (FreeBASIC v0.13b)
> 
> #entry point
> .section .text
> 	.balign 16
> 
> .globl fb_main_entry
> .globl fb_MAIN_entry
> fb_main_entry:
> fb_MAIN_entry:
> 	call	fb_moduleinit
> 	call	fb_modulemain
> 	ret
> 
> #user code
> fb_modulemain:
> 	push	ebp
> 	mov	ebp, esp
> 
> _t0001:
> push 1
> push 16
> lea eax, [_t0002]
> push eax
> call _fb_StrAllocTempDesc@8
> push eax
> push 0
> call _fb_PrintString@12
> 
> push 0
> call _fb_End@4
> 	mov	esp, ebp
> 	pop	ebp
> 	ret
> 
> #initialization
> fb_moduleinit:
> 	finit
> 	call	_fb_Init@0
> 	ret
> 
> 	#'main.bas' compilation took 2.131835191355069e-003 secs
> 
> #global initialized constants
> .section .data
> 	.balign 16
> 
> 	.balign 4
> _t0000:	.ascii	"\0"
> 	.balign 4
> _t0002:	.ascii	"Hello, World!!!\0"
> 
> 
> It dont use none Interruption of system, only BIOS..
> 
> FreeBasic is all!
> 
> 

1. You do not call the bios yourself in any way, you let freebasic do the job of
printing it, and that code is platform dependent, it's different for every
platform freebasic supports.

2. Even if you tried, you can't call the bios directly in most os's nowadays;
you have to use platform dependent system calls that do it for you.

3. I've never heard anyone call x86 assembly code for "platform independent"
before.

Regards, Alexander Toresson