$this->{DATA}{DEVICE} = "lp0";

##</code><code>##

Data port:    ff  11111111
Control port: ff  11111111
Status port:  ff  11111111
set  bit 0 to 0
read bit 0:   1
set  bit 0 to 1
read bit 0:   1
set  bit 0 to 0
read bit 0:   1
set  bit 2 to 1
read bit 2:   1
Bit 0: 1
Data port:    ff  11111111
set data      'a' (0x61 01100001)
Data port:    ff  11111111
set control    4  (bit 2)
Control port: ff  11111111
Status port:  ff  11111111