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MFJ-1278B MULTI-MODE COMPUTER INTERFACING
Radio Shack Color Computer
There are several terminal programs available for the Color Computer. You will probably
want to use a commercial program (rather than writing your own) since the Color Computer
has a "software UART" that is difficult to program in BASIC.
Some of the terminal programs available are COLORCOM 64, AUTOTERM and
RICKEYTERM (for Coco III). Others are WIZ and XTERM for OS-9.
Radio Shack Model 100/102 and NEC 8201
These computers have built-in terminal programs in ROM. Consult your computer's
documentation for instructions in their use.
MFJ-1278B SERIAL PORT PIN FUNCTIONS
This section describes the pins used on the MFJ-1278B RS-232C serial port connector. It is
intended for users with special applications requiring hardware handshaking. This
information should not be needed by most users.
Pin # Mnemonic Name
1 FG Frame Ground
2 TXD Transmit Data
3 RXD Receive Data
4 RTS Request To Send
5 CTS Clear To Send
6 DSR Data Set Ready
7 SG Signal Ground
8 DCD Data Carrier Detect
9 --- + 12V unregulated reference
10 --- - 12V unregulated reference
Table 2-4. RS-232C Pin Designations
Pin 1 Frame Ground
The Frame Ground pin is provided for attachment to the chassis of the MFJ-1278B
and the chassis of the attached device (computer or terminal). This pin is available
at a feed-through hole on the MFJ-1278B PC board near pin 1 of the serial
connector. It is not electrically connected anywhere else on the MFJ-1278B circuit
board.
Pin 2 Transmit Data