Instruction manual

Offset Component Description
+16 Reserved This field is reserved as specified in the ALPHA SRM.
+24 Length of
the device-
dependent
information
The length in bytes of the rest of the Console Terminal Block,
as filled by the MACHINE RESET PALcode.
+32 Console device
IPL
The IPL level at which the console interrupts.
+40 Console
transmit
interrupt
vector
The interrupt vector for transmit interrupts, 800
16
.
+48 Console
receive
interrupt
vector
The interrupt vector for receive interrupts; 800
16
.
+56 Console
terminal type
The terminal type of the console device. A terminal or printer
connected to the printer port on the SCC is 2; a graphics
device is 3; the network device is C0
16
.
+64 Keyboard type The nationality of the keyboard. This field is initialized to the
keyboard type stored in NVR.
+72 Address of
the keyboard
translation
table
The address of the keyboard translation table, which converts
a keycode to an ASCII character.
+80 Address of the
keyboard map
table
The address of the keyboard map table, which converts a key
position into a keycode.
+88 Keyboard
state
The current state of the LK401 keyboard, such as the state of
the
Ctrl
,
Shift
, and
Autolock
keys.
+96 Last key
entered
Saves the last key entered so as to support the METRONOME
character; autorepeats when key is held down.
+104 Address of the
US font table
The address of the tables that contain the USASCII
characters.
+112 Address of
the MCS font
table
The address of the tables that contain the multinational
characters.
+120 Font width The width of the font in pixels.
+128 Font height The height of the font in pixels.
+136 Monitor width The width of the monitor in pixels.
+144 Monitor height The height of the monitor in pixels.
+152 Monitor
density
The dots per inch of the monitor.
+160 Number of
planes
The number of planes on the graphics device.
+168 Cursor width The width of the cursor in pixels.
+176 Cursor height The height of the cursor in pixels.
+184 Number of
heads
The number of heads supported by the graphics console
device.
16–46 Console