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- Path: rcfnews.cs.umass.edu!barrett
- From: ronny@tmx.com.au (Ronny Cook)
- Newsgroups: comp.sys.amiga.reviews
- Subject: REVIEW: DKB Cobra accelerator and Ferret SCSI adapter
- Followup-To: comp.sys.amiga.hardware
- Date: 11 Mar 1996 20:32:47 GMT
- Organization: The Amiga Online Review Column - ed. Daniel Barrett
- Lines: 244
- Sender: amiga-reviews@math.uh.edu (comp.sys.amiga.reviews moderator)
- Distribution: world
- Message-ID: <4i22lf$rnh@kernighan.cs.umass.edu>
- Reply-To: ronny@tmx.com.au (Ronny Cook)
- NNTP-Posting-Host: knots.cs.umass.edu
- Keywords: hardware, accelerator, SCSI, A1200, commercial
- X-Review-Number: Volume 1996 Number 7
- Originator: barrett@knots.cs.umass.edu
-
-
- PRODUCT NAME
-
- DKB Cobra '030 Accelerator (28MHz)
- DKB Ferret SCSI adapter for DKB accelerators
-
- [MODERATOR'S NOTE: This review was updated on 11 May 1996 to
- provide a correct vendor name and address. -Dan]
-
-
- BRIEF DESCRIPTION
-
- The Cobra is a 28MHz 68030 SCSI accelerator with MMU for the A1200.
- The Ferret is a SCSI adapter which work together with the Cobra.
-
-
- AUTHOR/COMPANY INFORMATION
-
- Name: DKB
- Address: Post Office Box 930344
- Wixom, MI 48393-0344
- USA
-
- Telephone: (810) 348-3821
- Fax: (810) 348-3755
- Tech Hotline: (810) 348-3531
-
-
- LIST PRICE
-
- Cobra with 4MB RAM: AUD$499 (I think - I paid $449)
- Ferret: AUD$199 (again, I paid $199 so this may not be right.)
- I bought the card with a 68882/33 FPU & crystal which cost an
- additional AUD$75.
-
-
- DEMO VERSION
-
- None.
-
-
- SPECIAL HARDWARE AND SOFTWARE REQUIREMENTS
-
- HARDWARE
-
- An Amiga 1200. A screwdriver would probably be handy.
-
- SOFTWARE
-
- None.
-
-
- COPY PROTECTION
-
- They probably decided that the engineering team needed to
- duplicate the device would be sufficient protection.
-
- I suppose that this makes it a dongle. :-)
-
-
- MACHINE USED FOR TESTING
-
- Amiga A1200. 2MB Chip, 2MB PCMCIA RAM (=> 16 bit, VVEERRYY SSLLOOWW)
- 1 external 880K floppy.
- Supplied (Seagate?) 40MB internal hard drive.
- IOmega ZIP Removable Disk SCSI drive (100MB cartridges).
- Kickstart & Workbench 3.0
-
-
- INSTALLATION
-
- Installation was a nightmare.
-
- Initially I put the 4MB SIMM onto the card. Then, with an
- unreasonable amount of force, I managed to get it into the trapdoor
- connector. This was the first place that I used the screwdriver. :-) I
- then pulled out the back panel on the A1200 to fit the Ferret. The
- Ferret attaches to the Cobra with a special lay-flat connector which
- is somewhat finicky about exact positioning.
-
- Turned it on. Nothing happened. Blank screen.
-
- To cut a long story short, part of the board was scraping
- against the shielding around the motherboard. I ended up opening up
- the system (the second time that screwdriver came in handy) and put a
- wad of paper between the board and the shielding. After this the
- system booted correctly. But it didn't recognise the Ferret.
-
- I detached then re-attached the Ferret and it started
- working. That finicky connector.
-
-
- REVIEW
-
- The installation process was my main problem with the
- board. Since the initial problems, the board has worked flawlessly.
-
- I was pleasantly surprised by the speedup with my internal
- hard drive; being an IDE drive, the accelerator sped up access
- noticeably. The PCMCIA RAM no longer had an opportunity to slow down
- the system. SysInfo reported that the system was a little faster than
- an A3000, as I would have expected. The system in general was
- noticeably snappier.
-
- Unfortunately I can't give any solid benchmarks at this
- point. :-( Compiling Angband with SAS/C 6.55 and full optimisation
- took a couple of hours. The Angband sources are about 700K.
-
- The 28MHz Cobra includes an MMU (the main reason why I bought
- it rather than the 40MHz model, which is only slightly more
- expensive.) I haven't yet had opportunity to use it but it should be
- very useful for development work.
-
- The system included a floppy containing a utility to map
- Kickstart to RAM; I have not yet used this utility. The Ferret
- included some fairly powerful software for disk setup (the same as
- that used by the RapidFire II, apparently - sorry, I can't remember
- the name) but essentially no documentation for this software. The
- Ferret documentation focussed on an older software package.
-
- I bought the Cobra and Ferret in conjunction with an IOmega
- ZIP drive. I have had no errors with this drive or the controller, but
- the ZIP's transfer rates are not exactly astonishing enough to push
- *any* SCSI controller. The Ferret's software did a reasonable job of
- recognising and setting up the ZIP drive but I could not find any way
- of setting up the drive using "standard" settings.
-
- The boards have been highly reliable since installation.
-
- Although they don't make a fuss of it, the Cobra includes a
- real-time clock (unlike some earlier boards). The 68882 has been
- minimally useful (mainly used for Scenery Animator).
-
-
- DOCUMENTATION
-
- Documentation for the Cobra was of reasonable quality given
- that there wasn't really all *that* much to document. I picked up a
- clue about the board scraping against the shielding by reading the
- manual closely. The actual installation instructions *could* have been
- more helpful, however.
-
- Documentation for the Ferret was moderately woeful. Certain
- points in the installation procedure were not explained well (the
- lay-flat connector has two sides, slightly different; did it matter
- which was on which side? I have no idea.) Not really suitable for
- beginners.
-
- Documentation for each product basically consisted of standard,
- cheap-photocopy, stapled, 8-page booklets. Could be better, could be
- worse.
-
-
- LIKES
-
- It's proved fairly reliable. It is, to the best of my
- knowledge, the cheapest way (barring a standalone MMU) to obtain an
- MMU for the Amiga. The Ferret, since it's not limited by the PCMCIA
- port, I expect to be faster for SCSI operations than (say) the
- Squirrel. The PCMCIA port is left free.
-
- It's probably one of the most versatile cards available in
- this price range.
-
-
- DISLIKES AND SUGGESTIONS
-
- The problem where the board scrapes against the shielding
- during installation needs fixing. It wouldn't matter if there were no
- *circuitry* on the board at that point, but there *is*.
-
- Documentation for the Ferret needs work.
-
- The Ferret's SCSI port sort of hangs loosely in the back port
- of the A1200. There's nothing holding it in place but the Cobra
- itself. The potential for disaster here makes me nervous. A sudden
- tug could wreck the machine. It's far too easy for dust and other
- foreign substances to get into this hole.
-
- There was no way to confirm independently that the Ferret was
- being recognised.
-
- The board isn't all that fast compared to other accelerators,
- but you get what you pay for.
-
-
- COMPARISON TO OTHER SIMILAR PRODUCTS
-
- I haven't seen other accelerated Amigas for some years, so I
- can't make a fair comparison.
-
-
- BUGS
-
- None so far, although I found it curious that the software
- included with the Ferret to upload a firmware update to the Cobra did
- so even when the board didn't *recognise* the Cobra.
-
-
- VENDOR SUPPORT
-
- Having ordered the hardware on a Wednesday, I was getting
- nervous on the following Tuesday when it hadn't yet arrived. I was
- pleasantly surprised when the vendor (Fonhof Computer Supplies) called
- to explain the delay. The hardware arrived the next day.
-
- I was going to call at one point when I was having trouble
- with installation, but sorted out the problems without needing to call
- the vendor.
-
-
- WARRANTY
-
- To be honest, I can't recall. Both boards came with warranty
- cards to sent to the local Australian distributor.
-
-
- CONCLUSIONS
-
- After using the board for a couple of weeks, I wish I had
- waited a month and bought the (50MHz) Mongoose instead. :-) It would
- have been almost twice the speed for not all that much more. Oh well.
- 4MB fast RAM also isn't really enough; after it's chewed up the system
- slows down dramatically.
-
- Except for the problem I had in installing the card I've been
- very happy with it. Knock off a star for the installation headaches
- and half a star for the rotten Ferret documentation. Call it three and
- a half starts out of five.
-
-
- COPYRIGHT NOTICE
-
- This review is placed in the public domain. No rights reserved. :-)
- Ronald Cook, 8th March, 1996.
-
- Ronald Cook, Technical Support - Message Handling Systems/The Message eXchange
- Email: ronny@tmx.com.au ------ Phone: +61-2-550-4448 ----- Fax: +61-2-519-2551
- All opinions are my own and not those of TMX unless explicitly stated
- otherwise.
- ---
-
- Accepted and posted by Daniel Barrett, comp.sys.amiga.reviews moderator
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