Intel Extensible Firmware Interface - Manual (Page 853)

Version 1.10 12/01/02 B-1
Appendix B
Console
The EFI console was designed so that it could map to common console devices. This appendix
explains how an EFI console could map to a VGA with PC AT 101/102, PC ANSI, or
ANSI X3.64 consoles.
B.1 SIMPLE_INPUT
Table B-1 gives examples of how an EFI scan code can be mapped to ANSI X3.64 terminal,
PCANSI terminal, or an AT 101/102 keyboard. PC ANSI terminals support an escape sequence
that begins with the ASCII character 0x1b and is followed by the ASCII character 0x5B, “ [ ”.
ASCII characters that define the control sequence that should be taken follow the escape sequence.
(The escape sequence does not contain spaces, but spaces are used in Table B-1 to ease the reading
of the table.) ANSI X3.64, when combined with ISO 6429, can be used to represent the same
subset of console support required by EFI. ANSI X3.64 uses a single character escape sequence
CSI: ASCII character 0x9B. ANSI X3.64 can optionally use the same two-character escape
sequence “ESC [ ”. ANSI X3.64 and ISO 6429 support the same escape codes as PC ANSI.
Table B-1. EFI Scan Codes for SIMPLE_INPUT
EFI Scan Code
Description ANSI X3.64
Codes PC ANSI
Codes AT 101/102 Keyboard
Scan Codes
0x00 Null scan code N/A N/A N/A
0x01 Move cursor up 1 row CSI A ESC [ A 0xe0, 0x48
0x02 Move cursor down 1 row CSI B ESC [ B 0xe0, 0x50
0x03 Move cursor right 1 column CSI C ESC [ C 0xe0, 0x4d
0x04 Move cursor left 1 column CSI D ESC [ D 0xe0, 0x4b
0x05 Home CSI H ESC [ H 0xe0, 0x47
0x06 End CSI K ESC [ K 0xe0, 0x4f
0x07 Insert CSI @ ESC [ @ 0xe0, 0x52
0x08 Delete CSI P ESC [ P 0xe0, 0x53
0x09 Page Up CSI ? ESC [ ? 0xe0, 0x49
0x0a Page Down CSI / ESC [ / 0xe0, 0x51
continued