944-959



     Get text record (line)            5       5   BASIC:
                                                   INPUT
                                                   #n,A
     Get binary record (buffer)        7       7   BASIC:
                                                   GET #n,A
     Put text record (line)            9       9
     Put binary record (buffer)       11       B   BASIC:
                                                   PUT #n,A
     Close                            12       C
     Dynamic (channel) status         13       D

     BASIC uses a special "put byte" vector in the IOCB to talk
     directly to the handler for the PRINT#n,A$ command.
     Disk File Management System Commands (BASIC XIO
     command):

     Rename                           32      20
     Erase (delete)                   33      21
     Protect (lock)                   35      23
     Unprotect (unlock)               36      24
     Point                            37      25
     Note                             38      26
     Format                          254      FE

     In addition, XIO supports the following commands:

     Get character                     7       7
     Put character                    11       B
     Draw line                        17      11   Display
                                                   handler
                                                   only.
     Fill area                        18      12   Display
                                                   handler
                                                   only.

     FILL is done in BASIC with XIO 18,#6,12,0,"S:" (see the BASIC
     Reference Manual for details).

     For the RS-232 (R:), XIO supports:

     Output partial block             32      20
     Control RTS,XMT,DTR              34      22
     Baud, stop bits, word size       36      24
     Translation mode                 38      26
     Concurrent mode                  40      28

     (see the 850 Interface Manual for details)

     CIO treats any command byte value greater than 13 ($D) as a
     special case, and transfers control over to the device handler for
     processing. For more information on IOCB use, read Bill