Message Input And Output Devices; Tape (Option T Only); Tape Input - IBM 5100 Communications Manual

Message Input and Output Devices
You can use the keyboard and tape units to transmit data and the printer and/or
tape unit to record received data. All data transmitted and received is displayed on
the input line of the display screen. Commands and incomplete lines of data
displayed on the input line are not printed or written on tape. (An incomplete line
is a line not ended with a new-line character.)
TAPE (OPTION T ONLY)
You can use the tape unit for input or output if option T is selected. If the
auxiliary tape unit is installed on your 5100, you can use either tape unit for input
or output; however, you cannot use them simultaneously.
Tape cartridges used in communications are unlabeled (there is no automatic tape
labeling or checking) so you must use care to protect your existing tape files. The
SAFE feature on the tape cartridge prevents writing to an input file. Do not remove
an output tape from the tape unit before closing it with the
~CLOSE
command, or
data may be lost both on the cartridge removed and the next cartridge inserted.
Tape Input
When the tape is used for input, the tape supplies the messages to be transmitted.
The specified tape file must contain only character data records (file type 1, 2, or
3). For a description of these file types, see the 5100 APL Reference Manual or the
5100 BASIC Reference Manual. Use the
~OPEN
command to open the file and
define it as an input file. Then enter the
~TAPEIN
command to specify that the
input will be supplied from the tape. If a tape, printer, or received error (code 091)
occurs, the tape input operation is terminated and can be started by reentering the
~TAPEIN
command.
When the last record is read from the file, the tape is automatically closed and DONE
is displayed on the status line. To stop transmitting from the tape, hold down the
shift key and press the ATTN key. No data is lost and you can resume transmitting
by reentering the
~TAPEIN
command.
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