OUTx Commands

OUTx commands perform an I/O output from the source into the destination. 
 Width can be byte, word, or doubleword. The syntax is as follows: 

OUTB( destination, source);
OUTW( destination, source);
OUTDW( destination, source);

<destination>  ::= <pio variable>  |  <constant>
<source>  ::= {<constant>  |  <register>}

For example: 

outb(seq_address,r1);              //seq_address must have been declared.
outw(0x3c4,0x5520);