Sony NWS-1510 Service Manual page 108

4 - 3 - 10. Bitmap board command
Used
to
check the
internal
color
bitmap board.C**l
Used to test
the memory read/write functions
of
the board.
Used during
raster operation to determine if
the
effects
of
raster operation
are
correct.
Used
d1...Jring vector
operat1on
to
determine if the effects of
vector operation are correct.
Dur
i
n
g
v e
ct or
opera
t
i
on , t
he
f
o
L l
O'w' i
n ~~
Pat t er n
s sh o u L d a
PP ear
on
the color
display
in the following order.
a) Vertical stripes (Fig.l)
Vertical stripes are displayed
iJsing
every other pixel in the
horzontal rows.
b) Vertical stripes (Fig.2)
The previous display
is completely
overwritten 'w'ith
a
'w 1
hite
screen, then vertical stripes are again displayed using every·
other pixel
in
the horizontal
rows.
Fig.1
Fig.2
c) Write pattern(Fig.3)
A
DDDDDDDDPattern is repeated in
the
horizontal direction.
Fig.3
d) Bitbit test (Fig.4)
Kanji
patterns are written
over
pattern
cJ, and the
mixed
result
i
S'
d
i s
p
l
a y e
d .
e) Bitbit test (Fig.5)
Geometrical patterns are 'w'ritten
over
pattern d), and the mixed
result
is disclayed.
Fig.4
Fig.5
B
indicates the
newly o....iritten portion.
**The bitmap checks are all automatic. The user is only required
to confirm whether the patterns are correctly d~spLayed or not.
4-16 NWS-1510/1530/1580