HP 330 - Figure 3-21. Typical Video Board Block Diagram

~
ciQ.
=
"1
~
W
I
N
~
~
~
rr
~
-
-<
s:
~
0
t:C
0
~
"1
~
t:C
C
~
~
~
~
;.
()Q
"1
:::::l
~
~
~
9
o·
:::::l
e:..
0
(!)
U1
~
'"i
-6'
~
o·
:::::l
(,Q
Q1
PLANE 1
E
DISPLAY
.ONE PER
MONOCHROM
BOARD
CONTROLLER.
4
~
"
,
....-..-
fRAME
....-..-
BUffER
RED
GRN/SYNC ••
BLUE
....-..-
CONTROLLER
• .cOMPOSITE VIDEO
ON MONOCHROME BOARDS.
RED/BLUE/GREEN ONLY ON
COLOR BOARDS.
PLANE 2
~
r
DISPLAY
CONTROLLER.
4~
PIXEL BUS
ADDRESS BUS
DATA BUS
DISP.
'----
ROM
---+-""
r
-,
HP 98547A ONLY
PLANE 3
PLANE 4
I
PLANE 5 PlANE 6
I
4
I
4
I
I
,
DISPLAY DISPLAY
I
DISPLAY DISPLAY
CONTROLLER. CONTROLLER.
I
CONTROLLER. CONTROLLER.
4~ 4~
L
,- -j- -
4
-
- - - --
,
..I
RANDOM
~
_\.
LOGIC
I.&J
It
010 BUS
ck
:::»
/
CD
DECODE