Z86131 datasheet(39/50 Pages) ZILOG

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Z86129/130/131

P R E L I M I N A R Y

NTSC Line 21 Decoder

DS96TEL0200

Using Textset

TEXTSET features an OSD mode that will paint on the

screen in a manner similar to a TEXT Mode display. The

memory will be organized using the current information in

the Text Position register and the display will follow the

current setting in the Display register. The default display

parameters for OSD are 15 lines per row, Drop Shadow

mode. The TEXTSET command can be followed by

successive WRITE CHAR commands interspersed with

the RETURN command at the appropriate points to paint

on an OSD display starting at the top of the Text window

as set by the Text Position register and moving to the next

line at each RETURN command. The display will scroll if a

RETURN command is sent when at the bottom of the Text

window. A subsequent TEXTSET command will clear the

screen and generate a new OSD screen.

The following example shows an OSD display generated

using TEXTSET. This screen will paint on rather than pop

on. Features like flash are included in the command

sequence for demonstration purposes.

* The TEXT display is first set to 4 rows at the bottom of

the screen.

OSD Command

Function

{C3,D4}

* set Textpos reg for base row

13, 4 rows

{C1,80}

* set OSD display for BOX

mode, 15 lines/row

{C2,A6}

* set BOX to Blue, keep HPOS

unchanged

{32}

* select TEXTSET mode

* The next two cmds are used

for positioning and color.

{A2,05}

* cursor to char pos 5

{A3,08}

* mid code to make Red chars.

Cursor moves to 6

{A3,B9}

* mid code to start Flash,

Cursor moves to 7

{A5,57}

* 'W' double wide, char col 7,8

{A5,41}

* 'A' double wide, char col 9,10

{A5,52}

* 'R' double wide, char col

11,12

{A5,4E}

* 'N' double wide, char col

13,14

{A5,49}

* 'I' double wide, char col 15,16

{A5,4E}

* 'N' double wide, char col

17,18

{A5,47}

* 'G' double wide, char col

19,20

{A5,20}

* ' ' double wide, char col 21,22

{30}

* Return moves cursor to next

row, char pos 1

{A2,00}

* Cursor to char pos 0

{A3,0A}

* PAC sets color to Yellow,

cursor moves to char pos 1

{A3,54}

* 'T' single width, cursor moves

to char pos 2

{A3,68}

* 'h'

{A3,65}

* 'e'

{A3,72}

* 'r'

{A3,65}

* 'e'

{A3,20}

* ' '

{A3,69}

* 'i'

{A3,73}

* 's'

{A3,20}

* ' '

{A3,61}

* 'a'

{A3,20}

* ' '

{A3,74}

* 't'

{A3,6F}

* 'o'

{A3,72}

* 'r'

{A3,6E}

* 'n'

{A3,61}

* 'a'

{A3,64}

* 'd'

{A3,6F}

*'o'

{A3,20}

*' '

{A3,69}

*'i'

{A3,6E}

*'n'

{A3,20}

*' '

{A3,74}

*'t'

{A3,68}

*'h'

{A3,65}

*'e'

{A3,20}

*' '

{A3,61}

*'a'

{A3,72}

*'r'

{A3,65}

*'e'

{A3,61}

*'a'

{A3,2E}

*'.'

{30}

* Return moves cursor to next

row, char pos 1

{A3,50}

*'P'

{A3,6C}

*'l'

{A3,65}

*'e'

{A3,61}

*'a'

{A3,73}

*'s'

{A3,65}

*'e'

{A3,20}

*' '

{A3,74}

*'t'

{A3,61}

*'a'

{A3,6B}

*'k'

{A3,65}

*'e'

OSD Command

Function

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