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- Path: news.lr.net!usenet
- From: ashw@lr.net (Ash Wyllie)
- Newsgroups: comp.sys.amiga.hardware
- Subject: Re: Removing on-board termination from GVP SCSI Controller
- Date: 29 Feb 1996 22:42:27 GMT
- Organization: LRNet
- Message-ID: <2805.6633T817T2677@lr.net>
- References: <4gviq9$6tc@news1.io.org> <2661.6633T4T1160@galstar.com>
- NNTP-Posting-Host: port40.lr.net
- X-Newsreader: THOR 2.22 (Amiga;TCP/IP)
-
-
- >>My apologies to anyone reading this post (more or less) twice, but I
- >>thought I'd have more luck if I brought it out of the previous thread
- >>(concerning zip drives).
-
- >>I have a gvp scsi controller that I am trying to get to work with a new
- >>zip drive. It appears that the problems I am having with the controller
- >>is that the scsi chain is being terminated before it gets to any external
- >>devices, and I have been advised to remove the termination from the scsi
- >>controller itself, the on-board harddrive, or both. Unfortunately, I
- >>have not been able to locate my manual anywhere (four years of moving
- >>back and forth to school.....), and I haven't been able to figure out
- >>what to do just by looking at the board.
-
- >>So, does anyone have experience with this board and feel up to giving
- >>some nice, step by step instructions?
-
- >>The board in question is:
-
- >> GVP Impact Series II Hard-Disk+RAM-Card
- >> Model A2000-HC811
- >> gvpscsi.device version 4.5
- >> board itself says: Series II, Rev II
- >> with a 120 meg Maxtor HD attached to the card
-
-
-
- > It more likely you need to upgrade your ROMs. I have v4.13 (four-point-
- >thirteen) vice (four-point-five). I was told the same thing about the GVP
- >Series II and the on controller termination..so I desoldered, YES desoldered
- >cause the termination isn't socketed on the GVP Series II. You would think
- >that would be an indication that it wasn't meant to be removed. Anyway I
- >listened to a so called expert here that even cliamed to design SCSI
- >controllers. I desoldered them vice just cutting them off and guess what?
- >the damn thing wouldn't work no matter what I did. I tried every combination
- >of termination, non-termination ect.. and it just refused to work without the
- >terminations on the controller. So I soldered sockets on my controller and
- >reinstalled the resistor packs and ordered a ROM upgrade and my CD-ROM worked
- >fine.
-
- > Don't be to eager to go chopping off pieces of your controller that the GVP
- >engineers incorperated into the design. It's much eaiser to replace the
- >firmware.
-
-
- > The drive mounted to the hardcard should already have the termination
- >resistors off, but if not look on the bottom of the drive near the connector
- >& there should be 2 long resistor packs that are socketed. If you have more
- >than one internal drive then the last drive on the internal chain needs to
- >have the termination packs installed. Also the last device on the external
- >chain needs to be terminated, even it it's the only external device.
-
- >--
-
- >Email: wizard@galstar.com
-
- >WWW: http://www.galstar.com/~wizard
-
- >Member <TEAM AMIGA>
-
-
- >"Good Enough" is the death knell of progress.
-
- You might try the Guru-Rom, it makes GVP boards run much better.
-
- -ash
-
-