Tandy 1400LT - VII-2. RAM PCB Circuit Diagram

VII-2. RAM PCB Circuit Diagram
RAM
1M DRAM (256 X 4 Bit) 3c 4
(1. 3, 14, 15. 17)
22u +u 1 C306
74HC08
I I
IC302
16c UE
aE
+5v 3
-?-
I
I
IC303
I
74HC04
74HC04
1
Y IC305
CJ08,
II
vcc GND
EDL-40
I] IC306 16
1
5
8 0.01u 4
IC305
-
0.01u
74HC04
-IC305
11. 13: GND
IC300 306
R300 I 301
C300
.., 308
NO. 18
7-18