Epson MFJ-1278B manual Radio Shack Color Computer, Color Computers, Color Computer DB-25P

MFJ-1278B MULTI-MODE COMPUTER INTERFACING

Radio Shack Color Computer

The Color Computer series (except for the Micro Color Computer) uses a 4-pin DIN-style connector for its serial port. If you wish to construct your own cable, the information in Figure 2-2 will be helpful. All necessary parts should be available from Radio Shack dealers.

Color Computer	DB-25P
4	2
2	3
3	7

Fig. 2-2. Serial port wiring for Radio Shack

Color Computers

Radio Shack Model 100/102 and NEC 8201Radio Shack Model 100, serial port interfacingThese computers have built-in standard RS-232C serial ports that are compatible with the MFJ-1278B. You will need a standard male-to-male RS-232C cable to connect the computer to the MFJ-1278B.

IBM PC/XT/AT/386/486 and compatibles Computer

"Include other computers with 25-pin RS-232 Ports"If your computer is an IBM or compatible, you should have a serial port with standard DB-25 or DB-9 pin connector. You may use a standard IBM serial modem cable with the correct gender on each end of the cable.

MFJ Enterprises, Inc. offers optional Starter Pack (MFJ- 1289) for the IBM or compatible computers. A computer connecting cable is included with the Starter Pack. The supplied cable is of male to female gender, to connect your MFJ-1278B to the computer.

For other computers with a 25-pin RS-232C port, consult the manual for your computer or accessory to see which pins it uses to send and receive data on, as well as the pin used for signal ground. Follow the computer manufacturer's recommendations for connecting the serial port to a modem. You may also find the technical information in this section useful.

Your MFJ-1278B is configured as Data Communications Equipment (DCE), the technical term for an RS-232C modem. Most computers are configured as Data Terminal Equipment (DTE). If this is the case for your computer, you may be able to wire pin 2 of the MFJ- 1278B connector to pin 2 of your computer's RS-232C port. Then wire pin 3 to pin 3 and pin 7 to pin 7 on the computer's RS-232C port. You can provide these connections with a standard 3-wire male-to-female or male-to-male RS- 232C extension cable, depending on whether your computer has a DB25S or DB25P connector.