Texas Instruments TI-99/4A User Reference Guide

CHAR subprogram
To describe the dot pattern pictured below you would code this
string
for CALL CHAR:
"1898FF3D3C3CE404"
Examples:
> NEW
> 100 CALL CLEAR
LEFT
RIGHT
BLOCK
> 110
A$="1898FF3D3C3CE404"
BLOCKS
BLOCKS
CODES
> 120
B$="lS19FF8C3C3C2720"
" 130
CALL
CHAR(128,A$)
ROW 1
18
> 140 CALL
CHAR{129,B$}
ROW 2
98
ROW.1
FF
>150
CALL
COLOR ( 9,7, 12 )
ROW 4
3D
> 160 CALL
VCHA.K( I Z, 10,128)
ROWS
3C
> 170
FOR DELAY=l
TO 500
ROW 6
3C
> 180
NEXT DELAY
ROW 7
E4
> 190
CALL VCHAR( 12,16,129}
ROW 8
04
> 200
FOR DELAY=l
TO 500
> 210
NEXT DELAY
> 220
GOTO 140
> 230
END
:> RUN
--screen clears
If the string expression is less than 16 characters, the CUlllputer will
assume that the remaining characters are zero. If the string is
longer than 16 characters, the computer will ignore the excess,
Remember that
CALL CHAR only defines a character, To display
the
character on the screen you will need to use CALL HCHAR,
CALL VCHAR. PRINT, or DISPLAY When CALL CHAR is
[1f'rformf\rl. any character already on the screen with the same
char-code is changed to the new character.
11·78
--character moves back and
forth
(P,'c"" CLEAR to Mop
the prof:l'am)
:> NEW
:> 100 CALL CLEAR
>110 CALL CHAR(128,U0103070Fl
F3F7FFFU)
> 120 PRINT CHR$(128)
>- 130 END
:> RUN
- - s ere e n L 1 ed" ::.
...
** DONE **
User's Reference Guide

Texas Instruments TI-99/4A Specifications

General

Brand	Texas Instruments
Model	TI-99/4A
Category	Desktop
Language	English