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參數(shù)資料
| 型號： | STV942X |
| 英文描述： | EVALUATION KIT OSD FOR MONITORS |
| 中文描述： | 評估板顯示器的OSD |
| 文件頁數(shù)： | 7/9頁 |
| 文件大?。?/td> | 282K |
| 代理商： | STV942X |
III.4 - OSD RAM Editor
The OSD RAM Editor is running when the Page
Editor Software starts.
The active keys are :
-
Standard Character keys :
They correspond to the ASCII character codes
Hex 20 to Hex 7F.
When depressing one of those keys, the corre-
sponding character is put in current RAM position
(cursor position), with the current color attributes
(set by "F2" command). The RAM position is
always overwritten.
Characters whose codes aren’t in the above
range are available with the "Special Codes"
command "F6".
-
Arrow keys :
The four arrow keys are used to move the cursor
by one position, depending on the arrow direction.
There is no change in the RAM contents, but at
each move of the cursor, the content of the last
position is sent to the OSD device. When the
cursor is placed on a position containing a de-
scriptor, a special code character, or a user de-
fined character (on its first line), the detailed
contents is displayed on an additional window.
-
CTRL, Arrow :
This function is made to change the color of
several characters without retyping them : When
an Arrow key is depressed in conjunction with the
CTRL key, the current position is rewritten with the
current color attributes, then the cursor moves
accordingly with the arrow direction. So, moving
the cursor with CTRL, Arrow keys will repaint the
underlying characters with the current color.
-
"TAB" :
Action on this key toggles the "OSD Display" bit
of the OSD Display control register (bit 7,
@3FF3). The result of this is that in development
configuration where the Demo board is inserted
between the PC and the PC monitor, one can
easily switch the monitor display between the
Page Editor screen and the OSD output screen.
-
"Home" :
Moves the cursor to the beginning of
the current line.
-
"End" :
Moves the cursor to the end of the current
line.
-
"Page Up" :
Moves the cursor to the top line, on
the current column.
-
"Page Dn." :
Moves the cursor to the bottom line,
on the current column.
-
"Return" :
Moves the cursor to the beginning of
next line.
-
"Del" :
Deletes the current position and shifts back rest
of the line. Last position of the line is blank. This
function operates only if there is no user defined
character stored between current position and
end of line.
-
"CTRL, Del" :
Same function than "Del" except that the current
position content is stored into a temporary mem-
ory that can be recalled with "CTRL, Ins".
-
"Ins" :
Inserts a blank into the current position. The rest
of the line is shifted to the right. The last position
of the line is lost. This function operates only if
there is no user defined character stored between
current position and end of line.
-
"CTRL, Ins" :
Same than "Ins" except that the current position
is not blanked, but written with the temporary
memory content if already initialized by "CTRL,
Del".
III.5 - Command "F1" :
Registers Settings
To edit a register, depress the key "F1". A new
window appears on the screen, that shows the
detailed "bits" contents of the register currently
under edition.
Active keys :
-
Down Arrow :
Edit the next register.
-
Up Arrow :
Edit the previous register.
-
Left Arrow :
Edit the bit on the Left.
-
Right Arrow
: Edit the bit on the Right.
-
0 or 1 :
Reset or Set the bit.
-
"Enter" :
Validation of the current bit and edit
next bit.
-
"Escape" :
Exit from Registers Edition and go
back to RAM Editor
III.6 - Command "F2" :
Define Current Color
This command is used to define the current color
attributes. Those attributes remain available until
the next "F2" command. The current color is visible
in the color window, under the RAM and Registers
windows.
The color definition is made in two steps :
-
Foreground and Background colors definition :
At the left side of the color window is a color
selector, made of an upper palette for the choice
of the foreground color, and a lower palette for the
choice of the background color, including trans-
parent background.
Up and Down Arrow keys move the selector to the
upper palette and to the lower palette. Left and
Right Arrowkeys move the selector from color to
color inside a palette. The resulting color is shown
in a rectangle, at the right side of the palettes. The
validation of the color is made by "RETURN" key.
Depressing the RETURN key defines the new
color as the current color and enters the second
step of the definition.
STV942x - DEMO KIT
7/9
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