Epson HX-20 User Manual

Your cassette recorder is now connected to your HX-20. You may

use it to save and load 

  programs, as described in the  Epson

HX-20 BASIC Tutorial and Reference Manual.  Or you may use it
with various applications programs, as described in the documen-
tation for those programs.

One word of caution: all cassette recorders vary, in tape speed and

in the position of their record/ playback heads. These variations can
be very frustrating, because a program recorded on one cassette

recorder might not load back when you use another cassette

recorder. You’ll find that your cassettes work most reliably if you

use only one cassette recorder with your HX-20.

The RS-232 socket on the back of your HX-20 enables it to com-

municate with an external printer, modem, or other  RS-232

compatible device.  (Note that you cannot connect the HX-20 to a

printer or other device that features only a  parallel  interface.) You

can only connect the HX-20 to one RS-232 device at a time.

To connect such a device, purchase the appropriate HX-20 ,RS-

232 cable from your Epson dealer. Then consult the documentation
that came with your RS-232 device, and correlate it with the infor-

mation in Table 6-1.

Signal

DIN Pin

DB-25 Pin

GND (Signal Ground)

1

7

TXD (Signal Out*)

2

2

RXD (Signal In*)

3

3

RTS

4

4

CTS

5

5

DSR

6

6

D T R

7

20

CD

8

8

Case Ground

DIN Case

1

* From HX-20’s point of view.

(In Table 6-1, “DIN Pin” refers to pins in the 8-pin DIN socket

labelled “RS-232” at the back of the HX-20, and “DB-25 Pin” refers

to pins in the large trapezoidal plug you’ll find at one end of the

HX-20 RS-232 cable. This large plug is called a DB-25 connector.)

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