Sharp PC-4741 Service Manual page 38

8-5-5. Color Graphics Adapter Check
This program is used to test the internal LCD controller, LD display
unit. color/monochrome CRT adapter (CE-471A) and the color CRT
monitor interfaced to it.
If the system console was not set up to eGA when this program Is
chosen, the following message is displayed.
Set Display Mode to Color/Graphics and Console to CGA.
In this
event,
the choice must be revised through the setup menu to
change the display (LCD) or CRT adapter display mode to graphics
and color and the system console to
eGA
with the individual devices
diagnostic menu displayed. The following
sub~menu
appears if the
system console has been set to
eGA.
You may now choose the item
by
typing the item number
1
to
9.
Depression of
0
causes the control
to return to the individual devices diagnostics menu.
Color/Graphics Adapter Check
1 --- Color/graphics display buffer check
2 --- Attribute check
3
~~~ 80
x
25 alphanumeric mode check
4 ~~- 40 x 25 alphanumeric mode check
5 --- 320 x 200 graphics mode check
6 --- 640 x 200 graphics mode check
7 --- Screen paging check
8 --- Color CRT check
9 --- RUn all above checks
o --- Exit
Enter your selected number:_
Color/Graphics Adapter Check Menu
• Color/graphics display buffer check
The program checks the viode-RAM (VRAM) on the color/graphics
display adapter. writing certain data Into the VRAM and reading it
back.
• Attribute check
All the attributes modes of the color/graphics display adapter are
checked. They are all the intensity, blinking, reverse video, and
foregroundlbackground color. Visually check the information dis-
played on the screen referring to the following.
-37 -
ATIRIBUTECHECK
GREEN
CYAN
RED
MAGENTA
BROWN
LIGHT GRAY (A)
DARK GRAY
LIGHT BLUE
LIGHT GREEN
LIGHT CYAN
LIGHT RED
LIGHT MAGENTA
YELLOW
WHITE (B)
'" AIOI(
BLUE
GREEN
CYAN
RED
MAGENTA
BROWN
LIGHT GRAY
I
BLINK
I
BLINK
BLINK
BLINK
BLINK
BLINK
BLINK
BLINK
Attribute Check Display
-
P G-4741
(C)
(D)
When the color monitor is used. the portions (A) and (B) show the
color of display characters and the portion (C) the color of back-
ground.
Because it Is not possible to display color with the LCD. the portion
(A) is displayed by the normal characters (except black which is
displayed in reverse video) and the portion (B) is displayed in high-
light. The portion (D) is displayed blinking for both the color monitor
and the LCD.
• 80
X
25 alphanumeric mode check
All characters are displayed in the 80 x 25, alphanumeric mode. First,
the characters of normal attribute are displayed. As any key is
depressed next, the characters with the intensity attribute are dis-
played. Visually check the characters displayed on the screen, refer-
ring to the following.
BOX25 (45X25) ALPHANUMER J C MODE CHECK
@i
u u
I' ,
1
L,
la:
I~!
__
n _ u
la!--------
80 x 25 (40 x 25) Aphanumeric Mode Check Display
*
See the character format on the upper right of page 5.
• 40
X
25 alphanumeric mode check
--I
-I
-I
-I
All characters are displayed in the 40 x 25 alphanumeriC mode. First,
the characters of normal attribute are displayed. As any key is
depressed next, the characters with the intensity attribute are dis-
played. Visually check the characters displayed on the screen, refer-
ring to the above.
• 320
X
200 graphics mode check
Three dialog boxes come displayed in the 320 x 200 graphics mode.
First. the color set-1 (10=0) is displayed in the dialog box. Any key
depression displays the color set-2 (10=1) in the dialog box_ Visually
check the dialog boxes displayed on the screen, referring to the
following.