Technical data

Hardware Release Notes
B.1 ALPHAbook 1 (Alpha Only)
Note the following conventions:
– The default is either 3 (if a monitor is available) or 1 (if no monitor is
available.
– If you have not explicitly selected the display or the resolution, then
1024 x 768 CRT-only is the default when a monitor is detected. If no
monitor is detected, then 800 x 600 LCD-only is selected.
– If you explicitly select the display, then that selection takes precedence
over any other size requests. For example, if you select LCD, the
800 x 600 size supersedes any previous size specification.
• DECW$SERVER_REFRESH_RATE
This logical name selects an alternate vertical refresh rate in Hertz (for
example, 60 Hz). The defaults are as follows:
Mode Resolution
Vertical Refresh
Frequency in Hz
LCD-only 800 x 600 56
CRT-only 640 x 480 72
800 x 600 72
1024 x 768 70
Other CRT 640 x 480 60
640 x 480 70
800 x 600 56
800 x 600 60
1
1024 x 768 60
1024 x 768 75
1
Actual refresh is 62 Hz.
• DECW$SERVER_VIRTUAL_MODE
If this logical name is set to 1, note the following characteristics:
– The server operates as a virtual frame buffer.
– The resolution can be any of the previously listed sizes (or higher).
– An 800 x 600 window is displayed for the internal (TFT) monitor and
a 1024 x 768 window is displayed for an external monitor. Moving the
pointer to the screen edges pans the display within the virtual frame.
– Drawing can be slower (due to offscreen memory requirements). Changed
areas are updated on a batch count or when the server has no more work.
You can set the batch count with the logical DECW$SERVER_BATCH_
COUNT (the default is 10).
Hardware Release Notes B–3