16.1.1 Capabilities of Built-in Console Terminal: Keyboard
The LK401 supports 16 national variations. The Console program supports main
array keycode translations for the 16 types. The variation cannot be determined
by querying the keyboard; instead, the user selects the desired keyboard layout
at power-on either through a menu that appears at the first entry to the console
program after NVR failure (see Figure 24) or through the SET LANG command.
The built-in terminal code does not support the top row of function keys, editing
keys, cursor keys, the auxiliary keypad, or the Compose Character key; dead
diacritical keys are muted.
16.1.2 Capabilities of Built-in Console Terminal: Display
The built-in Console display functionality is limited to the following:
Display of USASCII graphic characters 21
16
(!) through 7E
16
(~)
Display of DEC supplemental graphic characters A0
16
through FF
16
Carriage return, CR, 0D
16
Line feed, LF, 0A
16
Space, SP, 20
16
Backspace, BS, 08
16
Tab, HT, 09
16
(treated as space)
Any other character is UNDEFINED.
The base system ROM uses 12 x 21 character font, displayed as a 12 x 22
character, for each graphic character in the DEC Multinational Character Set.
This font is used by the base system firmware to display characters on the
graphics output device.
Each glyph in the font is stored as 21 words, where the first word is the top row
of the character and the least significant bit in each word is located in the left
column. Characters are stored in a mirror image to conform with the way the
character appears on the screen.
The glyph for the character 3 (33
16
) is.
.word ^X0000 ; ............
.word ^X0000 ; ............
.word ^X0000 ; ............
.word ^X0000 ; ............
.word ^X0000 ; ............
.word ^X0000 ; ............
.word ^X0000 ; ............
.word ^X01F0 ; ...*****....
.word ^X0208 ; ..*.....*...
.word ^X0200 ; ..*.........
.word ^X0200 ; ..*.........
.word ^X0200 ; ..*.........
.word ^X01E0 ; ...*****....
.word ^X0200 ; ..*.........
.word ^X0200 ; ..*.........
.word ^X0200 ; ..*.........
.word ^X0208 ; ..*.....*...
.word ^X01F0 ; ...*****....
.word ^X0000 ; ............
.word ^X0000 ; ............
.word ^X0000 ; ............
16–2 Console
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