Intermec CV30 Intermec Terminal Emulator (ITE) Programmer's Reference Manual - Page 38

Chapter 1 - About 3270 and 5250 Programming Direction Byte Descriptions Bit Description 7 0: Roll up 1: Roll down 6-0 Number of lines to roll Results: The top and bottom row numbers specify the first and last lines for inclusion in the roll, and together define the number of lines presented on the display for the roll. These conditions govern the Roll command: • Lines vacated due to the Roll are not cleared to nulls. • Format table is not changed (could cause bizarre results). Note: If display does not conform to the format table, roll is not done. A scroll distance of zero has no effect on the display. • Rolled over data and lines rolled out of the area are lost (cannot be rolled back onto screen). • The state of the keyboard and pending AID bytes are not affected. The following conditions cause parameter errors: • A top line of zero. • A top line greater than or equal to the display length. • A bottom line of zero. • A bottom line greater than the display length. • A top line greater than or equal to the bottom line. • A roll area greater than the bottom line minus the top line. Description: Restrictions: Format: Write Error Code The Write Error Code command forces the computer into the prehelp state (the same state entered when an operator makes a keying error). This command clears any outstanding AID requests. The computer rejects this command if it is in the prehelp, system request, or SS messages state. The Write Error Code command may take any of the following forms. To avoid an error, you must provide either an Insert Cursor order, an error message, or both. The format for the Write Error Code command with an Insert Cursor order is: ESC Hex 04 Write Error Code Hex 21 Insert Cursor Order Position cursor 26 Intermec Terminal Emulator (ITE) Programmer's Reference Manual