1) the pinouts for the DB-9 serial connector of the Tandy Radio Shack WP-2 word processor, ($350 retail),
2) the pinouts for the Mac SE/30 printer and modem ports (and presumably ports on other mini-8 connector Macs), and
3) The connections necessary to construct a cable to directly connect a WP-2 to a Mac for ASCII text file transfer by either straight text or by Xmodem. (both supported in WP-2 ROM.)
WP-2 pin-out Information: from Radio Shack
DB-9 male (RS-232C serial port)
Pin # Signal Name Signal Description
1 DCD (RLSD) Data Carrier Detect
2 RxD Receive Data
3 TxD Transmit Data
4 DTR Data Terminal Ready
5 SG Signal Ground
6 DSR Data Set Ready
7 RTS Request To Send
8 CTS Clear To Send
9 RI Ring Indicator
Mac SE/30 pin-out information: p.87, manual
8-Pin Mini-Circular, Modem & Printer Ports
(RS-232/RS-422 serial ports)
Pin # Signal Name Signal Description
1 HSKo Handshake out (12V+)
2 HSKi Handshake in/external clock
3 TxD- Transmit data-
4 SG Signal Ground
5 RxD- Receive data-
6 TxD+ Transmit data+
7 GPi General purpose input *
8 RxD+ Receive data+
* Modem port only: Can be set in software to be a second external clock.
Mac SE/30 mini-8 (RS422) to WP-2 DB-9 (RS232) pin connections:
Mac SE/30 (RS422) WP-2 (RS232)
mini-8 pin, sig. descrip. DB-9 pin, sig.descrip.
1, (unused)
2, handshake in 4, data terminal ready
3, transmit data - 2, receive
4, signal ground 5, signal ground
5, receive data - 3, transmit
6, (unused)
7, (unused)
8, receive data + 5, signal ground
NOTE: also jump pin 7 to pin 8 on the DB-9 Connector, Cable is a serial, null modem, RS232 (instead of RS422) cable.