Rockwell Automation 6008-SI IBM PC I/O SCNNR 6008-SI - Manual (Page 48)

Chapter 5
Startup, Status, and Shutdown
5-5
start_6008
This function does a partial setup. Your program would call this function
rather than setup_6008 only when for some reason you want to
synchronize with the scanner but not set the baud rate and resistor and not
do an initial autoconfigure.
Calling sequence:
status = start_6008(
irq_l,segment
);
Arguments:
irq_l: same as under setup_6008 above.
segment: same as for setup_6008 above.
Returned values:
status: SC_OK 0(hex) if the sync proceeded without error,
SC_PENDING FF(hex) if the sync timed out, SC_NOT_OK 01(hex) if
the segment argument was illegal, SC_BAD_REQ 10(hex) if the
scanner had already been synchronized earlier in this execution,
SC_BAD_VERSN FE(hex) if the scanner firmware series didn’t match
the host, or a confirmation error status returned from the scanner.
If the returned status is anything but SC_OK, your program should
display the status value and the value of function fatal_6008, then abort
execution.