Z86129 Datasheet, PDF (42/50 Pages) Zilog, Inc. – NTSC LINE 21 DECIDER

Z86129/130/131
NTSC Line 21 Decoder
PRELIMINARY
OSD Cmd Code
Function
*'Graphics can be created like'
*The next group of cmds will use
Graphic Char patterns to make
the two row
* word HELLO. The data byte of
the WRITE CHAR cmd is the
address
* location for the graphic cell
desired as shown in Fig. 5.
{A0,0b}
{A2,00}
{A3,06}
*select poprow 11
*Move cursor to 0
*PAC, Cyan chars
{84,30}
* Set Graphics mode in case
another user had changed it
earlier.
{A5,20}
{A5,20}
{A5,20}
{A5,20}
{A3,20}
{A3,eb}
{A3,ea}
{A3,20}
{A3,fb}
{A3,20}
{A3,ea}
{A3,20}
{A3,ea}
{A3,20}
{A3,fa}
{A3,f5}
*""
*""
*""
*""
*""
* Graphic Cell
*Graphic Cell
*""
* Graphic Cell
*""
* Graphic Cell
*""
* Graphic Cell
*""
* Graphic Cell
* Graphic Cell
{A0,0c}
{A2,00}
{A3,06}
*select poprow 12
*Move cursor to 0
*PAC, Cyan chars
{A5,20}
{A5,20}
{A5,20}
{A5,20}
{A3,20}
{A3,ea}
{A3,ea}
{A3,20}
{A3,eb}
*""
*""
*""
*""
*""
* Graphic Cell
* Graphic Cell
*""
* Graphic Cell
OSD Cmd Code
{A3,20}
{A3,eb}
{A3,20}
{A3,eb}
{A3,20}
{A3,eb}
{A3,d7}
{36}
Function
*""
* Graphic Cell
*""
* Graphic Cell
*""
*Graphic Cell
* Graphic Cell
*
* flip
*
*
Manual Row Mapping and Control
For most OSD displays the POPSET, POP ROW SEL,
FLIP, TEXTSET and RETURN commands should be used
to control row positioning.
TEXTSET mode provides automatic row allocation from
top to bottom of the screen with all rows continuously
visible. Additionally, TEXTSET screens have a definable
vertical window size and position and support automatic
text scrolling at the bottom of the window.
POPSET screens are created in off-screen memory while
the previous screen is displaying. Up to 8 rows of
characters can be defined. These rows can be mapped to
any of 15 display rows using the POP ROW SEL
command. Double high rows may also be defined with
POP ROW SEL. The FLIP command is then used to "pop-
on" up to 8 rows of characters replacing the previous
screen. The off-screen rows may be mapped to the same
row numbers as the on-screen rows.
In some applications it may be necessary to access the
display hardware at a lower level to achieve special screen
effects. Examples of these special situations include the
following:
1. More than 8 on-screen rows required in a "pop-on"
style screen
2. Characters need to be added dynamically to an on-
screen display
3. On-screen rows need to be dynamically moved,
disabled or enabled
The Z86129 supports manual screen mapping and display
control commands to handle these special applications.
These commands allow each of the 16 physical rows of
character memory implemented in the device to be
mapped to any of 15 display row positions.
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DS96TEL0200