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Non-Form Messages
LDS Plus Reference Guide
E-SW-LDSPLUSRG-G
Non-Form Messages
A
non-form message
is a message that is intended for the Receive Buffer only.
Non-form messages are used to perform such tasks as:
•
setting the automatic transmit buffer length
•
changing the beep pattern of a DOS terminal
•
instructing an operator to carry out an action
•
or enabling barcode or aux input.
Rule: Always send non-form messages “forced” to ensure that the DOS
terminal accepts them.
You can send an outbound non-form message from the host computer to the DOS terminal either
forced or unforced. The host can receive non-form messages from the DOS terminal with or
without sequence numbers.
The form’s control character determines whether a message is a form or non-form message.
A
forced message
is a message that is copied into the DOS terminal receive buffer regardless of
the buffer's previous content. In other words, this message overwrites any previous message in the
receive buffer.
An
unforced message
is a message that is copied into the DOS terminal receive buffer only if the
receive buffer does not contain data (cleared).
The
receive buffer
is a conceptual buffer where all message text is put first upon receipt at the
DOS terminal.
Summary of Contents for 1280
Page 4: ......
Page 200: ...182 Expanded Functions LDS Plus Reference Guide E SW LDSPLUSRG G ...
Page 208: ...190 General Messages LDS Plus Reference Guide E SW LDSPLUSRG G ...
Page 238: ...220 Protocol Messages LDS Plus Reference Guide E SW LDSPLUSRG G ...
Page 246: ...228 The VX1 VX2 and VX4 Keyboards LDS Plus Reference Guide E SW LDSPLUSRG G ...
Page 260: ...242 Index LDS Plus Reference Guide E SW LDSPLUSRG G ...