IBM 4840-563 System Reference - Page 56
Appendix G Input/Output device commands, VFD commands, Emulation mode select 00 <NULL>
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Appendix G Input/Output device commands This appendix lists the commands and their usage for the SurePOS 500 Series I/O devices. VFD commands This section describes the following VFD commands: v Emulation Mode Select v Character Set Select v User Character Definition v Brightness Control v Alphanumeric Message Scroll v Backspace v Horizontal Tab v Line Feed v Carriage Return v Test v Display Position v Normal Display v Vertical Scroll v Cursor On v Cursor Off v Reset Note: The command code format shown in the following topics is the hexadecimal value followed by the ASCII representation of that value within brackets. Emulation mode select (00) 00 nn Purpose: Sets the specified emulation mode. This example sets Logic Controls emulation mode: 00 00 Character set select (02) Note: This command is only effective in IBM Mode. 02 nn Purpose: Selects the specified character set. This example selects the US/European character set: 02 00 User character definition (03) 03 nn Purpose: Defines a custom character. Logic Controls Emulation Mode The byte that follows the command byte contains an ASCII character between X'20' and X'7F' of a keyboard key to be redefined. This byte is followed by five bytes, which define the bit patterns of the user-defined character. Logic Controls Emulation Mode only allows one keyboard key to be redefined. This means that there is only one user-definable character in this mode. Once a key is redefined, any occurrence of that character on the display will change to the user-defined character. If a new key is redefined, the previously redefined key is restored to the original character in all places on the display and the newly redefined key will SurePOS 500 Model XX3 Technical Reference, v 1.3 81 Page 56 of