Your cassette recorder is now connected to your HX-20. You may use it to save and load BASIC 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 documentation 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.

Connecting your HX-20 to an RS-232 device

The RS-232 socket on the back of your HX-20 enables it to communicate 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 information in Table 6-1.

TABLE 6-1

RS-232 Signals

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

D S R

 

 

6

6

D T R

 

 

7

20

C D

 

 

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.)

57