key.asm

凌阳unsp

.define		P_IOA_DATA  	    0x7000
.define		P_IOA_DIR   	    0x7002 
.define		P_IOA_ATTRI	    	0x7003
.define		P_IOB_DATA  	    0x7005
.define		P_IOB_Dir   	    0x7007
.define		P_IOB_ATTRI			0x7008
.external ClearWatchDog
.external _main
.ram
.var first,last,keyword;

.code
//.public Scan_loop10;
.public _key_asm

_key_asm:
   call ClearWatchDog
/////////////////////////////////////
    r1=0xfff0;
		[P_IOA_DIR]=r1 ;
   r1=[pc]
    r1=0xff00;
		[P_IOA_ATTRI]=r1   ;        
	
	r1=0x0000;
		[P_IOA_DATA]=r1;
// Scan_loop10:  r3=0x0000;
//Scan_loop0:		
 
 // r2=[P_IOA_DATA];
  r1=0x00f0;
nop
nop
nop
nop
nop
nop
nop
   r1=[P_IOA_DATA];
   [first]=r1;
 /////////////////////////////// 
 
   ///////////////////////////////
   
   
   ///////////////////////////////
 
        nop
        nop
        nop
        retf;
 //aa_wait:
 //  jmp aa_wait; 
 
 
 //.public _bbbb

//_bbbb:.proc
 //   r1=_main
 //   pc=r1;
    


retf
//.endp