Serial Device, 265
  additional information, 284
  alternative I/O modes, 270
  break command, 279
  break conditions, 272
  buffered characters, 267
  closing, 268
  commands and functions, 266
  device characteristics, 265
  device interface, 266
  EOF mode, 272
  error codes, 279
  high speed operation, 271
  io_TermArray, 272
  multiple ports, 280
  NULL-terminated write, 268
  opening, 267
  parameters, 275
  querying the device, 278
  quick I/O, 271
  reading, 267
  separate tasks, 273
  serial flags, 276
  setting parameters, 275
  status bits, 278
  terminating the read, 272
  using BeginIO(), 271
  writing, 268