From:	hackeroc3 AT aol DOT com (HackerOC3)
Newsgroups:	comp.os.msdos.djgpp
Subject:	Get_Scan_Code
Date:	30 Mar 1998 01:56:30 GMT
Lines:	30
Message-ID:	<1998033001563000.UAA06101@ladder01.news.aol.com>
NNTP-Posting-Host:	ladder01.news.aol.com
Organization:	AOL http://www.aol.com
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

does anyone have code to get a scan code?  I have this microsoft c code:

unsigned char Get_Scan_Code(void)
{
// get the scan code of a key press, since we have to look at status bits
// let's use the inline assembler


// is a key ready?

asm
    {
    mov ah,01h          ; //function 1: is a key ready?
    int 16h             ; //call the interrupt
    jz empty            ; //there was no key so exit
    mov ah,00h          ; //function 0: get the scan code please
    int 16h             ; //call the interrupt
    mov al,ah           ; //result was in ah so put into al
    xor ah,ah           ; //zero out ah
    jmp done            ; //data's in ax...let's blaze!

empty:
     xor ax,ax          ; //clear out ax i.e. 0 means no key
done:

    } // end asm

// since data is in ax it will be returned properly

} // end Get_Scan_Code

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