Block I/O Commands

Block I/O commands are designed for indexed ports. Byte-indexed access 
requires both index and data port values. Word and Dword block I/O is 
implemented as autoincrement block I/O, which causes no explicit 
modification to the index register. Word and Dword block I/O assumes that 
the hardware either implements autoincrementing or that the values being 
written specify both index and data. The startindex  field is used as the 
index of the first PMI register in the set and as the first indexed port 
value.  If the hardware's autoincrementing feature needs to be programmed 
explicitly, it should be done prior to calling the block I/O and should be 
left enabled upon completion of the mode set. See "Save and Restore 
State", and [TrapRegs] in PMI Sections. 

BINB( count, startindex, indexport, dataport );
BOUTB( count,startindex, indexport, dataport );

<startindex>  ::= <constant>
<count>  ::= <constant>
<indexport>  ::= <pio variable>  |  <constant>
<dataport>  ::= <pio variable>  |  <constant>
<port>  ::= <pio variable>  |  <constant>

For example: 

r0 = 0x11; r1 = 0x12; r2 = 0x13;
boutb(0x03, 0x00, seq_address, seq_data);   //seq_address and seq_data
                                            //already declared.