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Vector 4 - Page 33

Vector 4
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CPU,
RAM/PROM
and
Video
portions
of
SBC
Schematic
(Exhibit
VI-2
(B))
Schematic
Schematic Schematic
Block
Notation
Subsystem
Page
Diagram
Title
Number
Number(s)
'
A6
Microprocessor
CPU
System
MUX
Page
1
26
A7
Data
Bus
Transceiver
Page
1
20
Bl
)
Address
Mapping
RAM
Page
1
21
B2
CPU/Video
MUX
RAM/PROM
System
Control
Page
1
29
B3
CPU/Video
Address
MUX
Page
1
29
.
C1l
Video
Controller
Page
1
27
Video
System
C2
Video
MUX
Page
1
30
o8g-087
(2)
(2)
ZAVI=-2A15
ZA7
(2,3)
(2)
MAQ
yae
745189
7415245
-
U2
1
(1)
CPU/VID
us
74L504
U4
4>
741,5367,
(1)
IOWR
(1)
CPU/
10RQ
P167
{(3)
74L
500
1)
74L502
(2)
B2
MEMWR
(2)
+5v
A6
4
QRD
(3}
10
CCRmag
_.D_
U100
TOWR(3)
TOWR
(1)
us2
MREQ
14
1CDQ-1007
{3)
741
%367
WR
(3)
1)
249
ues
{1y
JOWR
(1)
2
{(v)
CpPu/
(1)
2
AT
(2)
A7
u7e
2
U3
(2}
Ly
L3
DISEN
{2)
YSYNC
(2)
HSYNC
(2}
(1)
ICRQ
74
>
A8
A10
88
ENBL
(1)
Jes
6545-A-1
uagd
B088-2
AVE
-83
I
ALPw/
.
'
SR
AT
‘L~A\5H
QAP
a0
{3
J64
.
F
74L504
ust
13
741574
II1-4