NetBSD/sys/arch/i386/isa/pcvt/Doc/Keyboard-Layout.VT

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================================================================================
# #
# Function key mapping for the "more VT220" - like layout #
# #
================================================================================
I. Special Keys Used To Change The General Runtime Functionality
=====================================================================
CTRL-F9 Function key labels ON / OFF
------------------------------------
this key is only operational, when in HP/VT mode, see CTRL-F11
CTRL-F9 toggles between function key labels displayed or not.
ON: screen has either 25-3 = 22, 28-3 = 25 or 50-3 = 47 lines
2 lines fkey labels displayed
row/col display enabled
1 line status/load avg line
OFF: screen has either 25-3 = 22, 28-3 = 25 or 50-3 = 47 lines
no function key labels displayed
no row/col display
no status/load avg line
applicable escape sequences:
switch OFF:
ESC & j @ remove labels from screen
switch ON:
ESC & j A display system fkey labels
ESC & j B display user fkey labels
ESC & j C display current fkey labels
CTRL-F10 User / System Function key labels
-------------------------------------------------
this key is only operational, when in HP/VT mode, see CTRL-F11
CTRL-F10 toggles between the display of user or system
function key labels
this key is only active if labels are toggled on via
the CTRL-F9 function key
screen has either 25-3 = 22, 28-3 = 25 or 50-3 = 47 lines
2 lines fkey labels displayed
row/col display enabled
1 line status/load avg line
applicable escape sequences: (see above)
ESC & j A display system fkey labels
ESC & j B display user fkey labels
ESC & j C display current fkey labels
CTRL-F11 Toggle between pure VT and HP-VT Emulation
----------------------------------------------------------
This key switches between pure vt100/vt220 mode and
vt100/vt220 with hp-fkey-labels mode of operation.
this is not dependent of any screen resolution the
virtual consoles are in.
initially, after power on, all virtual screens are in
the pure vt-mode:
- the emulator does not execute any hp escape sequences
- the function key label lines are switched off
- no load average or status line is displayed
- no row / column counter is displayed
- the full screen 25x80, 28x80 or 50x80 is usable
- CTRL-F9 and CTRL-F10 have no function
when toggled to the vt/hp mix of operation, the following
changes take place:
- the emulator executes the supported hp-esc sequences
- the function key labels are displayable depending
on the state of CTRL-F9/CTRL-F10
- the load average is displayed
- the row / column counters are displayed
- in any screen resolution, the last 3 lines are lost,
so one has a 22x80, 25x80 and 47x80 resolution
- CTRL-F9 and CTRL-F10 are operational.
when switching modes by means of CTRL-F11, the following
changes to the current environment, the emulator may
be in, apply:
- the screen is cleared
- the cursor moves to the home position
- the scrolling region is reset to default
(this functionality is available via an ioctl)
F5 Cycle current page
--------------------------
This key cycles through the display of the video
pages. on startup, page 0 is displayed; with every
keypress of F5, the next page is displayed, wrapping
from the maximum page number back to page 0.
F1 switches to page 0
F2 switches to page 1
F3 switches to page 2
F4 switches to page 3
Shift-F1 -- select screen 4
Shift-F2 -- select screen 5
Shift-F3 -- select screen 6
Shift-F4 -- select screen 7
Shift-F5 -- select (current screen - 1)
(this functionality is available via an ioctl)
II. Special Keys used to change the Runtime Functionality of a Page
=======================================================================
when in mixed HP/VT mode, one has two types of function key labels
on screen, user function keys and system function keys. they are
accessed by using the CTRL key while pressing a function key.
the function key labels are NOT available in pure VT220 mode--although
the function keys are still active
the user function keys and their labels can be reprogrammed by use of
escape sequences.
in system function key mode, several pre-programmed functions inside
the emulator can be toggled, currently implemented are:
- CTRL-F1, toggle 80/132 columns
- CTRL-F2, soft reset emulator
- CTRL-F3, toggle force 24 lines mode
- CTRL-F4, toggle keyboard debugging (if compiled in)
- CTRL-F5, toggle the audible beep generation
- CTRL-F6, toggle 7/8 bit char width
- CTRL-F7, toggle display functions. this means that control codes
in the range 0x00 to 0x1f are not EXECUTED by the emulator
any longer, but displayed on the screen
- CTRL-F8, toggle automatic cursor wraparound at end of line
these functions operate just for the selected page
III. Keyboard VT220 compatibility
====================================
The following keys behave different as probably expected.
They were mapped to provide more VT220 compatibility.
PC Keyboard VT220 Keyboard
------------- --------------------------------------------------
F6 - F12 emit the sequences for VT220 F6 - F12 keys
(ESC [ 17 ~ .... ESC [ 24 ~)
ALT F1 - F10 emit the sequences for VT220 F11 - F14, HELP, DO,
F17 - F20 keys
(ESC [ 23 ~ .... ESC [ 34 ~)
SHIFT F6 - F12 emit the User Definable Key sequences for VT220
F6 - F12 keys or
(ESC [ 17 ~ .... ESC [ 24 ~) for cleared sequences
ALTSHIFT F1-F10 emit the User Definable Key sequences for VT220
F11 - F14, HELP, DO, F17 - F20 keys or
(ESC [ 23 ~ .... ESC [ 34 ~) for cleared sequences
Insert Insert Here (ESC [ 2 ~)
Delete Remove (ESC [ 3 ~)
Home Find (ESC [ 1 ~)
End Select (ESC [ 4 ~)
PgUp Prev Screen (ESC [ 5 ~)
PgDn Next Screen (ESC [ 6 ~)
PrtSc (ignored)
Pause (ignored)
Break (ignored)
Cursor Keys dependent upon state of cursor key mode either
ESC [ A ... ESC [ D or ESC O A ... ESC O D
NumLock toggles Numeric Keypad for Keypad Numeric Mode
and Keypad Application Mode
ALT-Keypad-0 can be used to generate any keycode in the
ALT-Keypad-1 rage 0-255.
ALT-Keypad-2 this was modeled with the behaviour of a
ALT-Keypad-3 popular boot loader in mind
ALT-Keypad-4
ALT-Keypad-5
ALT-Keypad-6
ALT-Keypad-7
ALT-Keypad-8
ALT-Keypad-9
Numeric Keypad dependent upon state of keypad numeric/application
mode either 0 ... 9 or ESC O p ... ESC O y
ALT-NumLock emits PF1 sequence (ESC O P)
ALT-Keypad-/ emits PF2 sequence (ESC O Q)
ALT-Keypad-* emits PF3 sequence (ESC O R)
ALT-Keypad-- emits PF4 sequence (ESC O S)
ALT-F11 emits PF1 sequence (ESC O P)
ALT-F12 emits PF2 sequence (ESC O Q)
/* EOF */