Справочное Руководство для LXE 1280
24
The Compose and Receive Buffers
LDS Plus Reference Guide
E-SW-LDSPLUSRG-G
The Compose and Receive Buffers
You can enter data from the keyboard, barcode scanner, or optional RS-232 device. When you
enter data, it is important to know which buffer the DOS computer is displaying—compose or
receive.
enter data, it is important to know which buffer the DOS computer is displaying—compose or
receive.
What are Buffers?
• The compose and receive buffers are the interface between data and the display.
• The cursor is visible when the compose buffer contents are displayed.
• The compose buffer is used for all data entry.
• The receive buffer is the first location in the DOS computer to receive a message
• The cursor is visible when the compose buffer contents are displayed.
• The compose buffer is used for all data entry.
• The receive buffer is the first location in the DOS computer to receive a message
from the host computer. The receive buffer transfers the message to the next location
in the computer.
in the computer.
• When the receive buffer is empty, the display is blank except for a lowercase “e”
(for empty).
• Press [Alt] [R] to toggle the display between the compose buffer and the receive
buffer.
Buffer Keypresses
The following keys and key sequences directly affect the buffers.
Use the [Alt] [R] key sequence to switch between the receive and the compose buffers.
Keypress Function
[Alt] [1]
Reload the form buffer.
[Alt] [2]
Load a stored form.
[Alt] [3]
Allow input from barcode port.
[Alt] [4]
Allows input from an external device attached to the optional RS-232 port.
[Alt] [5]
Sends the contents of the receive or compose buffer (whichever is presently
being viewed) to an external device attached to the optional RS-232 port.
being viewed) to an external device attached to the optional RS-232 port.
[Del]
or
[BackSpace]
or
[BackSpace]
Clears the current field or clears the current form.
Function
[F1 – F40]
[F1 – F40]
The Function [F1 – F40] keys clear the display and compose buffer to a three
character header: XX). Any previous message in the compose buffer is lost.
The number of the function key that you press appears on the display in the
XX position. This behavior happens if FKeyXmitMode is N and FKeyAsChar
is N.
character header: XX). Any previous message in the compose buffer is lost.
The number of the function key that you press appears on the display in the
XX position. This behavior happens if FKeyXmitMode is N and FKeyAsChar
is N.
F1 - F10
[F1 - F10]
F11 - F20
[Alt] [F1 - F10]
F21 - F30
[Shift] [F1 - F10]
F31 - F40
[Ctrl] [F1 - F10]