
154 Servicing Personal Computers
Data
bus
TXD^
RXD-
From
)
ACIA\
RXC-
CTS-
_RTS-
DCD-
D7 CASMO
D5
D4
D3
D2
Dl
CAS
OUT
DO
DOUT
RTS
D IN
CTS
ICI
Serial
interface
X
Cassette
connector
*
* 0
RS-423
drivers/receivers
10μ IC2a^
Figure 4.7. Cassette interface for use with an external domestic cassette drive
CR/W
_100n
T
oov
Cass motor
o+5V
o Cass switch
o Cass write
o Cass read
Figure 4.8. Cassette interface for use with
a
dedicated cassette drive