www.pudn.com > 8255_code_lib.rar > CHIPFN01.C

/*- 
 *  ---------------------------------------------------------------------- 
 *  File        :   CHIPFN01.C 
 *  Creator     :   Blake Miller 
 *  Version     :   01.00.00            February 1991 
 *  Language    :   Microsoft Quick C   Version 2.0 
 *  Purpose     :   Intel 8255 Compatible Digital IO Functions 
 *              :   80X86 OUT Instruction Function 
 *  ---------------------------------------------------------------------- 
 */ 
 
void chp_portwt (int d_port, unsigned char d_byte); 
 
/*- CHIP : Byte Put --------------------------** 
 *  Write a byte to one of the 80X86 ports. 
 *  Duplicates the library function outp() 
 */ 
void chp_portwt (int d_port, unsigned char d_byte) 
	{ 
	_asm    { 
		PUSH    AX 
		PUSH    DX 
 
		MOV     DX, d_port 
		MOV     AL, d_byte 
		OUT     DX, AL 
 
		POP     DX 
		POP     AX 
		} 
	} 
 
/*- 
 *  ---------------------------------------------------------------------- 
 *  END CHIPFN01.C Source File 
 *  ---------------------------------------------------------------------- 
 */