Tandy 1400LT - Page 186

RAM
ADL-100SP4
+5v
74HC 157
1Y
2Y
3Y
4Y
74HC 157
16 1y
26
48
~2A
l4 I 4A
(1, 3, 4, 5. 14. 17)
(1. 3, 4. 5, 14. 17)
(1, 3, 4, 5. 14, 17)
(I, 3, 4. 5. 14, 17) 1A 3Y
(1, 3, 4. 5. 17)
(1, 3, 4, 5. 17) 11~3A 4Y
(1, 3, 4. 5. 17)
3
(1, 3, 4. 5. 14. 17) 10 38 2Y
l3
SEL
.. (15)
IC41
15,G
IC45 81 p3-
EDL-60
1M (256 x 4 Bit) DRAM
vcc GND
811 6 5 4
C70
0.01u
(14)
FTAEtr
A
A0
AI
A2
A3
A 14
A15
A16
A17
A4
A5
A6
A7
A10
All
A12
A13
7 A0
'
8 AI
9 A2
11 .A3
12 A4
13
14 A6
'7 ti IC43
'I
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I
T
+5v
t
RAS CAS
C72
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4 R58 22HM
7
4
...
tb
"* .. (14)
R59 22HM
9
12
+5v
FIR
FIR
EMAO
EMA
1
EMA2
EMA3
EMA4
EMA5
EMA6
EMA7
4
1 (15, 17, 18) DRAMPI5
1 1
+5v
(14) ADL-100SP10
74HC245
(1, 4. 5. 14. 15, 16, 17) A2 82
(1. 4. 5, 14, 15. 16, 17) A3 83
71. 4. 5, 14, 15. 16, 17) ~A4 84
(1, 4. 5, 14, 15, 16, 17) A5 85
(1. 4, 5. 14, 15, 16, 17) A6 B6
(1, 4, 5, 14, 16, 17) -A7 B7
9 -A8 88
(1, 4, 5, 14, 15, 16. 17)
(1. 4s 5, 14. 15, 16, 17)
2
AI 61
DO
D1
D2
03
D4
05
D6
D7
m
D-275-G
IC40 I 45
C69
... 73
R58 ,. 59
RAll
12 1-
11 4
DIR
dG IC42 +5v
(14)
C7
1
0.01u
*
1M (256 x 4 Bit) DRAM
(17. 18) EMDO
(17, 18) EMDI
(17, 18) EMD2
(17, 18) EM03
(17, 18) EMD4
(17, 18) EMD5
1
(17, le) EMD6
(17. 18) EM07
NO. 11
7-1 1