
8. CRT CHARACTER DISPLAY
B–61863E–1/06
PMC LIBRARY
232
SC/SC3/SC4 NB/NB2 16i/18i/21i 15i–A
f f f
[Name]
pl_dspopen4
[Description]
Initializes the VGA screen in 30 rows 80 columns mode.
The position of key–in line display is line 23.
[Format]
ret = pl_dspopen4();
short ret;
[Input]
______
[Output]
______
[Returns]
ret Completion code (–1, 0, 3)
–1 : Other than PMCMDI screen.
0 : Normal termination
3 : This function has been issued for the other than VGA screen.
[Remarks]
This function is effective only in VGA.
When this function is executed, initialization bit of R9072 must be
turned on before character is displayed.
Initialization flag must be set for each task which displays character.
15 14 3 2 1 0
TASK–ID 10 Initialization flag
TASK–ID 11 Initialization flag
TASK–ID 12 Initialization flag
·
·
TASK–ID 24 Initialization flag
TASK–ID 25 Initialization flag
R9072
NOTE
In the 15i–A, if some characters may be displayed by the
printf() function after calling this function, call initreq_printf()
function and set the initialize flag for all task displayed
character.
As for the initreq_printf(), refer to Section 8.21.
8.18
INITIALIZING THE
VGA SCREEN
(CHARACTER
DISPLAY) HAVING 30
ROWS 80
COLUMNS