Intermec CV30 Intermec Terminal Emulator (ITE) Programmer's Reference Manual - Page 36

Clear Unit Alternate, Restore Screen, Results, Clear Unit, Description, Restrictions, Format

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Chapter 1 - About 3270 and 5250 Programming Results: When the computer receives the Clear Unit command: • The presentation screen size is set to 24 rows by 80 columns. • The keyboard locks. The Input Inhibited annunciator is turned on. The error state (or system request state) is cleared. The shift, alternate, function, and insert modes are cleared. • Format table is cleared, default header assumed as this is not format level 0. • The MDT bit is cleared. • All function keys are set up to return data. • The display is cleared by writing nulls to the display buffer. • A normal attribute is written byte to row 1, column 1 of the display. • Cursor is placed at row 1, column 2; making the insert cursor address. • AID requests and pending Read Input Fields, Read MDT Fields commands are cleared. Note: Operated-selected reverse image and the Message Waiting annunciator are not affected by this command. Description: Restrictions: Format: Clear Unit Alternate The host system issues this command to clear the display screen and the format table. This command sets the presentation screen size to 27 rows by 132 columns. If the host system issues this command to a computer without 132-column support, the computer rejects the command with a negative response of "10030101." The Clear Unit Alternate command is formatted as follows: ESC Hex 04 Clear Unit Alternate Hex 20 Parameter Hex 00 Note: The parameter byte must contain Hex 00. Any other value causes the computer to return a negative response of "10030105." Description: Restrictions: Format: Restore Screen This command restores all data stored by the last Save Screen command. The computer rejects this command when it is in a system request or SS message state. The Restore Screen command is formatted as follows: ESC Hex 04 Restore Screen Hex 12 Data from Last Save Command Results: When the command is executed, these items are restored: 24 Intermec Terminal Emulator (ITE) Programmer's Reference Manual

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Chapter 1 — About 3270 and 5250 Programming
24
Intermec Terminal Emulator (ITE) Programmer’s Reference Manual
Results:
When the computer receives the
Clear Unit
command:
•
The presentation screen size is set to 24 rows by 80 columns.
•
The keyboard locks.
The Input Inhibited annunciator is turned on.
The error state (or system request state) is cleared.
The shift, alternate, function, and insert modes are cleared.
•
Format table is cleared, default header assumed as this is not format level 0.
•
The MDT bit is cleared.
•
All function keys are set up to return data.
•
The display is cleared by writing nulls to the display buffer.
•
A normal attribute is written byte to row 1, column 1 of the display.
•
Cursor is placed at row 1, column 2; making the insert cursor address.
•
AID requests and pending Read Input Fields, Read MDT Fields commands are
cleared.
Clear Unit Alternate
Description:
The host system issues this command to clear the display screen and the format
table. This command sets the presentation screen size to 27 rows by 132 columns.
Restrictions:
If the host system issues this command to a computer without 132-column support,
the computer rejects the command with a negative response of “10030101.”
Format:
The Clear Unit Alternate command is formatted as follows:
Restore Screen
Description:
This command restores all data stored by the last
Save Screen
command.
Restrictions:
The computer rejects this command when it is in a system request or SS message
state.
Format:
The Restore Screen command is formatted as follows:
Results:
When the command is executed, these items are restored:
Note:
Operated-selected reverse image and the Message Waiting annunciator are not
affected by this command.
ESC
Clear Unit Alternate
Parameter
Hex 04
Hex 20
Hex 00
Note:
The parameter byte must contain Hex 00. Any other value causes the
computer to return a negative response of “10030105.”
ESC
Restore Screen
Data from Last Save Command
Hex 04
Hex 12
<saved data>