T4900CT
3.7 Display Test
To execute the Display Test, select 4 from the DIAGNOSTIC TEST MENU, press Enter,
and follow the directions displayed on the screen. The Display test contains ten subtests that
test the T4900CT’s display in various modes. Move the highlight bar to the subtest you want
to execute and press Enter.
Subtest 01 VRAM Read/Write
This subtest writes constant data FFFFh, AAAAh, 5555h, 0000h, and address
data to video RAM (1MB). This data is then read from the video RAM and
compared to the original data.
Subtest 02 Character Attributes (mode 1, 13h)
This subtest displays the following character attribute modes; normal, intensi-
fied, reverse, and blinking as shown in the display below. The character
attribute modes display the foreground color and intensified color (16 colors or
16-level gray scale) using black, blue, red, magenta, green, cyan, yellow, and
white from the color display. The display below appears on the screen when
this subtest is executed.
CHARACTER ATTRIBUTES
NEXT LINE SHOWS NORMAL DISPLAY.
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NEXT LINE SHOWS INTENSIFIED DISPLAY.
IIIIIIIIIIIIIIIIIIIIIIIIIIIIII
NEXT LINE SHOWS REVERSE DISPLAY.
RRRRRRRRRRRRRRRRRRRRRRRRRRRRRR
NEXT LINE SHOWS BLINKING DISPLAY
BBBBBBBBBBBBBBBBBBBBBBBBBBBBBB
PRESS [Enter] KEY
00 08 ; BLACK
01 09 ; BLUE
04 0C ; RED
05 0D ; MAGENTA
02 0A ; GREEN
03 0B ; CYAN
06 0E ; YELLOW
07 0F ; WHITE
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