Intermec CV30 Intermec Terminal Emulator (ITE) Programmer's Reference Manual - Page 32

Chapter 1 - About 3270 and 5250 Programming Read MDT Alternates Read MDT Alternate is similar to the Read MDT Fields command, with these exceptions: • Leading and embedded nulls within the fields remain nulls. Trailing nulls are stripped. • For fields that are nulls but have their MDT bit on, the controller returns an SBA order followed by the field's address. Read Screen (Immediate) Description: This command sends the contents of the display to the host in the same order information appears on the screen. For example, row 1 goes first. Restrictions: This command must be the last command in the SNA chain, and CD must be on. The computer rejects the command when it is in the prehelp error, posthelp error, system request, or SS message state. During transmission the keyboard is locked, but pending AID requests or Read commands are retained. Note: If the display supports a separate message line, and the message line is selected, the command is rejected only for the system request and SS message states. The command is processed with the display in error state. Format: The Read Screen (Immediate) command is formatted as follows: ESC Hex 04 Read Screen (Immediate) Hex 62 Results: The contents of the entire display, including the attributes, are sent to the host system just as they appear in the regeneration buffer (no formatting or conversion is done). Cursor address and AID are not returned. This command does not clear either pending Read commands or AID requests. The keyboard is temporarily locked. The following are unaltered: • Annunciators • Cursor location • Display contents • Format table • Keying history • Modes Description: Save Screen (Immediate) The Save Screen command sends the state of the computer to the host. Information sent to the host includes: • Code returned in response to the Help key • Cursor location • Display buffer • Format table 20 Intermec Terminal Emulator (ITE) Programmer's Reference Manual