Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!sdd.hp.com!wuarchive!mit-eddie!uw-beaver!ubc-cs!alberta!alberta!cpsc.ucalgary.ca!ctycal!ingoldsb From: ingoldsb@ctycal.UUCP (Terry Ingoldsby) Newsgroups: comp.sys.m6809 Subject: Re: COCO upgrade Summary: Very old controllers needed +/- 12 v Message-ID: <535@ctycal.UUCP> Date: 5 Feb 91 00:16:31 GMT References: Organization: The City of Calgary, Ab Lines: 19 In article , rh2y+@andrew.cmu.edu (Russell E. Hoffman, II) writes: > Gilbert M. Sterart writes: ... > >[paraphrased] .. I have a CoCo I, I wanna replace it with a CoCo III, > > what can I keep / what can I throw away... ... > Well, you are pretty much in luck.. > You can re-use the disk controller and drives. If you have the VERY old style > disk controller (v1.0 ROM instead of v1.1), you may have a small problem, If you have a very old controller, it may require -12 v (and maybe +12v, I can't remember). It may also balk at running at 1.8 MHz, although this is not likely. I just added +/- 12 v supplies to my CoCo III and everything is happy. You can fit something inside the case without too much trouble. -- Terry Ingoldsby ctycal!ingoldsb%cpsc.ucalgary.ca Land Information Services or The City of Calgary ...{alberta,ubc-cs,utai}!calgary!ctycal!ingoldsb