Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.2 9/18/84; site qumix.UUCP Path: utzoo!linus!decvax!ittvax!qumix!len From: len@qumix.UUCP (Leonard Labar) Newsgroups: net.micro,net.micro.cbm Subject: RS422 to IEEE488 convert Message-ID: <152@qumix.UUCP> Date: Sat, 3-Nov-84 19:51:05 EST Article-I.D.: qumix.152 Posted: Sat Nov 3 19:51:05 1984 Date-Received: Sun, 4-Nov-84 04:41:53 EST Distribution: net Organization: Qume Corp., San Jose, CA Lines: 24 I've been attempting to connect a commodore vic-1525 dot matrix printer to my Macintosh with no success. Below is the connection scheme. I'm sure of my connector pinouts. Maybe someone can help me out on the handshaking timing required. The printer does NOTHING. MAC function PRINTER function --- -------- ------- -------- 1 ground ---------------------------- 2 ground 2 +5v n.c. 3 ground n.c. 4 TXD+ ------------------------------ 5 serial data 5 TXD- n.c. 6 +12v n.c. 7 printer handshake ----------------- 3 serial atn i/o 8 RXD+ n.c. 9 RXD- n.c. n.c. 1 serial srq in n.c. 4 serial clk i/o n.c. 6 reset/ It seems like what is required is an RS422 to IEE488 converter circuit. Does anyone know an economical, easy way to do this? Help!