Cassette Interface Write Hardware; Cassette Motor Control - IBM 5150 Hardware Reference Manual

+5V
74LS38
3.9K OHM
R
8253TIMER#2
to
OUTPUT
OR
o
0---------­
.S78V
TO AUX
INPUT
O------------------~
•
.075V
TO MIC
INPUT
GND
Figure 8. CASSETTE INTERFACE WRITE HARDWARE
+5V
I
+5V
I 4.7 I
KOHM
SN75475 RELAY
+ 5 V - CLAMP COIL
S
N/O
74LS38
C~.
CASSETTE
VCC
-
MOTOR
OR
IN OUT
COIL
CONTROL
MOTO~O
ON
o
.----
VSS
COM
GNO
Figure 9. CASSETTE MOTOR CONTROL
2-20