PK-88 OPERATING MANUAL
INSTALLATION
2 - 17
PK-88 - 33
2.11.4
Tandy Color Computer
The CoCo series (except for the Micro Color Computer) uses a 4-pin DIN connector for its
serial interface. Wire a cable as shown below.
Coco
PK-88 (DB25P)
4.......................2
2.......................3
3.......................7
2.11.5
Tandy Model 100/102, Kyocera KC-85 and NEC 8201
The Model 100/102, Kyocera KC-85 and NEC 8201 have built-in RS-232C serial ports com-
patible with the PK-88. You will need a standard male-to-male RS-232C extension cable to
connect the computer and the PK-88.
2.11.6
Other Computers with 25-Pin RS-232-C Ports
If your computer has an RS-232C port, consult your manual to see which pins are used
for Send data, Receive data and signal common. Read the instructions for connecting a
modem and connect the PK-88 the same way.
The PK-88 is configured as Data Communications Equipment (DCE), the technical term for
an RS-232C modem. Most computers and terminals are configured as Data Terminal
Equipment (DTE).
o
If your computer is configured as DTE:
Wire pin 2 of the PK-88 connector to pin 2 of the computer's RS-232C port, pin 3 to
pin 3 and pin 7 to pin 7. Use a standard 3-wire male-to-female or male-to-male RS-
232C extension cable.
o
If your computer is configured as DCE:
Wire pin 2 of the PK-88 to pin 3 of the computer connector. Wire pin 2 of the com-
puter connector to pin 3 of the PK-88. Wire pin 7 to pin 7.
Some computers require pin 5 of to be connected to an appropriate signal. Others may
require connections for pin 8 and pin 20. You can use the computer's output signals on
pins 4 and 6 as indicated below:
PK-88
COMPUTER
2........................2
3........................3
7........................7
:......4
:......5
:......6
:......8
:......20
