HP 300

-ONE PER
MONOCHROM
BOARD
E
RED
GRN/SYNC--
BLUE
+----
+----
+----
•• COMPOSITE VIDEO
1 PLANE 1 1
DISPLAY
CONTROLLER-
f
FRAME
BUFFER
CONTROLLER
ON MONOCHROME BOARDS.
RED/BLUE/GREEN ONLY ON
COLOR BOARDS.
1 PLANE 21 1 PLANE J 1
1
PLANE41
DISPLAY DISPLAY
DISPLAY
CONTROLLER- CONTROLLER-
CONTROLLER-
J
PIXEL BUS
J
ADDRESS BUS
DATA BUS
r----
-
RANDOM
'--
(I)
DISP.
0:
\.
LOGIC
LU
'--.
........-'
.....
010
BUS
ROM
.....
&
:::l
/
-............-.
CD
DECODE
"""---
"""---
Figure 3-12. Video Board Block Diagram
Functional Description 61
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