Intel Extensible Firmware Interface, Specification

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Version 1.02 12/12/00 333
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, PCANSI, 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 PCANSI.
Table B-1. EFI Scan Codes for SIMPLE_INPUT
EFI Scan Code Description
ANSI X3.64
Codes PCANSI
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
0x0b Function 1. CSI O P ESC [ O P 0x3b
0x0c Function 2. CSI O Q ESC [ O Q 0x3c
0x0d Function 3. CSI O w ESC [ O w 0x3d
continued