NAME

TD_CHANGENUM: return the current value of the disk-change counter.

FUNCTION

This command returns the current value of the disk-change counter (as used by the enhanced commands). The disk change counter is incremented each time a disk is inserted or removed from the trackdisk unit.

INPUTS

io_Device: preset by the call to OpenDevice()
io_Unit: preset by the call to OpenDevice()
io_Command: TD_CHANGENUM
io_Flags: 0 or IOF_QUICK

RESULT

io_Error: 0 for success, or an error code as defined in <devices/trackdisk.h>
io_Actual: if io_Error is 0, this contains the current value of the disk-change counter.