Path: utzoo!mnetor!uunet!lll-winken!lll-lcc!ames!pacbell!att-ih!ihnp4!inuxc!iuvax!bsu-cs!cfchiesa From: cfchiesa@bsu-cs.UUCP (Christopher Chiesa) Newsgroups: comp.sys.atari.8bit Subject: Re: Daisy-chaining two Atari 8bits Message-ID: <2320@bsu-cs.UUCP> Date: 10 Mar 88 19:14:36 GMT References: <1988Mar3.231347.12961@jarvis.csri.toronto.edu> Organization: CS Dept, Ball St U, Muncie, Indiana Lines: 21 Summary: Be careful connecting two machines via SIO port! In article , bk0h+@andrew.cmu.edu (Brett Kuehner) writes: > > I've done this with a 400 and 800. I just connected the SIO port on each on to > the back of the disk drive (810). It worked, as long as they didn't both do IO > at the same time. However, the SIO cables carry +5 volts, so even if you turn > the power switch on one machine off, or even unplug it, it will remain on, > powered by the other's power supply. It's kind of strange to flip the power > switch on and off, and have nothing happen. This does put a strain on the powe > supply that is still connected, and is probably bad. Yes, it probably IS bad. I have a friend who did what you describe, with two 800XL's and a 1050, and ended up destroying (burning out, somehow) both of the 800XL's. As in, beyond hope of repair. Brett, you got LUCKY! Chris Chiesa Ball State University Muncie, IN -- <><><><><><><><><><><><><><><><><><><><><><><><><><><><> Chris Chiesa <><><><><> <> {ihpn4|seismo}!{iuvax|pur-ee}!bsu-cs!cfchiesa <> <> cfchiesa@bsu-cs.UUCP <> <><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><>