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Appendix A - Command Details
A.1. Overwrite mode
In this mode, the cursor will move towards the right and begin from the upper left position.
When the cursor has reached the end of the upper line, the cursor will move down to the
bottom left position to continue. When the cursor has reached the end of the bottom line, it will
move to up the upper left position and overwrite the previous characters.
A.2. Vertical scroll mode
In this mode, the cursor will move towards the right. The cursor will begin from the upper left
position until it has reached the end of the upper line. The cursor will then move down to the
bottom left position to continue until it has reached the end of the bottom line.
A.3. Horizontal scroll mode
In this mode, the extent of the cursor activity is bound by a predefined range, limited to the upper
line. (Please refer to Set or cancel window command), where the default window is the whole
upper line. The cursor will begin from the left-end of the range and move to the right until it
reaches the end of the range, to continue, the characters that come there after will start pushing
the previous characters to the left, scrolling the characters to the left.
.
A.4. Set the string display mode and write string to display
Set the string display mode, write to upper or lower line d1 d2 d3 … dn {1
≦
n
≦
20}. ‘A’ stands
for the upper line, ‘B’ stands for the lower line. The string display mode will be cancelled and
the display will return to the previous mode after receiving CLR or CAN.
A.5. Upper line message continuous scroll
The message (previously defined) will scroll continuously in the horizontal direction until a new
command is received.
A.6. Move cursor left
When the current cursor is at the left-end position, this command operates differently
depending on the display mode.
Overwrite mode:
When the cursor reaches the left-end of the lower line. it will continue to the
right-end of the upper line, overwriting the previous characters. When it reaches the left-end of
the upper line, it will continue to the right-end of the lower line.
Vertical scroll mode:
When the cursor reaches the left-end of the lower line. the lower
line will scroll up and replace the previous upper line, the lower line will be cleared and the
cursor will continue to the right-end of the lower line.
Horizontal scroll mode:
The cursor will remain stationary.
A.7. Move cursor right
Move the cursor to the right. When the cursor has reached the right-end, this command
operates differently depending on the display mode.
Overwrite mode:
When the cursor has reached the right-end of the lower line, it will
continue to the left-end of the upper line and overwrite previous characters. When it has
reached the right-end of the upper line, it will continue to the right-end of the lower line.
Vertical scroll mode:
When the cursor has reached the right-end of the lower line, the
lower line will scroll up to replace the upper line, the lower line is cleared and ready to
continue characters thereafter.
Horizontal scroll mode:
The cursor will remain stationary.
