Path: utzoo!mnetor!uunet!husc6!cmcl2!nrl-cmf!ames!amdahl!dwl10
From: dwl10@amdahl.uts.amdahl.com (Dave Lowrey)
Newsgroups: comp.sys.cbm
Subject: Re: C128-1571-1541-1525 combination hangs serial bus?
Message-ID: <30863@amdahl.uts.amdahl.com>
Date: 5 May 88 14:58:20 GMT
References: <2868@tekgen.TEK.COM>
Reply-To: dwl10@amdahl.uts.amdahl.com (Dave Lowrey)
Organization: Amdahl Corporation, Houston TX
Lines: 47
Keywords: C128 C64 serial bus

In article <
>I have been having a problem ever since I got my C128 with a 1571 drive to
>replace my aging 64.  The problem is that when I hook up both drives and
>the printer to either the 64 or the 128, I cannot use the printer, or the
>drive at address 9.  
>
>I have hardware changed the 1541 to be at address 9.  
>
>The printer is a Sekosha C100 (1525 compaitble I believe) and works as a
>1525 with GEOS.
>
>Either both disk drives, or either disk drive and the printer will work
>as long as one disk or the printer is powered off/disconnected.  This is
>true with GEOS or in a normal mode of operation.
>
>Is this a normal situation or is this unusual?  Does anyone else have this
>problem?  Any help would be appreciated.
>
>NOTE:  The 1571 and C128 are a couple of years old, in case this is relevant
>at all.
>
>Thanks in advance for any help.
>-- 
>
>			Steve Coan
>			tektronix!tekgen!stephenc
>			(503) 627-1794

I had the same problem with my 64/1541/Cardco printer interface.
 
Turned out to be a C64 power supply problem. Don't know what whas wrong
with it, but when I replaced it, everything worked fine!


-- 
-------------------------------------------------------------------

                  "Familiarity breeds attempt"

                          Dave Lowrey
                          Amdahl Corp.
                          Houston, Texas
                          (713)-850-8828
                         ...!{ihnp4,cbosgd,hplabs,oliveb}!amdahl!dwl10

[ The opinions expressed <may> be those of the author and not necessarily
  those of his most eminent employer. ]