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- Path: rcfnews.cs.umass.edu!barrett
- From: edmundv@grafix.xs4all.nl (Edmund Vermeulen)
- Newsgroups: comp.sys.amiga.reviews
- Subject: REVIEW: Squirrel PCMCIA SCSI Interface
- Followup-To: comp.sys.amiga.hardware
- Date: 28 Mar 1995 21:51:33 GMT
- Organization: The Amiga Online Review Column - ed. Daniel Barrett
- Lines: 237
- Sender: amiga-reviews@math.uh.edu (comp.sys.amiga.reviews moderator)
- Distribution: world
- Message-ID: <3la0d5$si6@kernighan.cs.umass.edu>
- Reply-To: edmundv@grafix.xs4all.nl (Edmund Vermeulen)
- NNTP-Posting-Host: astro.cs.umass.edu
- Keywords: hardware, SCSI, PCMCIA, A600, A1200, commercial
- Originator: barrett@astro.cs.umass.edu
-
-
- PRODUCT NAME
-
- Squirrel SCSI Interface, software version 1.06
-
-
- BRIEF DESCRIPTION
-
- The Squirrel is a SCSI host adapter for the Amiga 600 and Amiga 1200
- that uses the PCMCIA (credit card) slot.
-
-
- AUTHOR/COMPANY INFORMATION
-
- Name: HiSoft
- Address: The Old School
- Greenfield
- Bedford
- MK45 5 BR
- UK
-
- Telephone: +44 (0)1525 718181
- Fax: +44 (0)1525 713716
-
-
- LIST PRICE
-
- 69 UK Pounds. My friend paid 249 Dutch guilders.
-
-
- SPECIAL HARDWARE REQUIREMENTS
-
- HARDWARE
-
- An A600 or A1200.
-
- SOFTWARE
-
- None listed.
-
- MACHINE USED FOR TESTING
-
- A1200 with MTEC 68030/28 MHz board with 4 MB Fast RAM
- Internal 545 MB Seagate 3,5" hard drive
- Goliath power supply
-
- SCSI devices tested with the Squirrel:
-
- Quantum LPS 52 and Quantum Lightning 540 hard disks
- Archive DAT tape streamer
- NEC CDR-25 CD-ROM reader
-
-
- INSTALLATION
-
- The Squirrel needs to be inserted in the PCMCIA slot on the right of
- the computer. This should be easy, but it wasn't on the one I tried, because
- part of the glued-on lid stuck out just a little bit, preventing it from
- sliding in properly. When I pressed the lid while inserting the device, the
- Squirrel could be inserted quite easily. The manual warns about not using
- too much force because of the delicate pins on the PCMCIA port. The
- Squirrel may be inserted and removed from the computer even when it is
- switched on: PCMCIA was designed for this, and it can be very handy if you
- need to use other PCMCIA peripherals, such as a modem, without having to
- switch the computer off. The "squirrelscsi.device" is automatically
- dismounted when the Squirrel is removed.
-
- Next, the software has to be installed. This is done using the
- standard Commodore Installer and is very easy. The squirrelscsi.device is
- installed and the User-Startup file is modified to include a SCSIMounter
- command for each SCSI address, since the Squirrel is not automounting. The
- user can also install the CD32 emulator or make a boot disk for the Squirrel
- or for the CD32 emulator.
-
-
- REVIEW
-
- When Commodore (RIP) first introduced the PCMCIA port on the A600,
- they told us that this industry standard interface would mean the
- possibility to add all kinds of devices from memory expansion to modems and
- network adapters. These have been slow to arrive, but now more and more
- peripherals for the Amiga use the credit card slot. At first, only memory
- cards could be used, but now there is an external IDE controller
- (Overdrive), CD-ROM adapters (Overdrive and Tandem) and modems can now also
- be used (using Erik Quackenbush's pcmcom.device).
-
- The Squirrel is the first PCMCIA SCSI adapter designed specifically
- for the Amiga. It can't be used on a notebook PC because of physical
- limitations (it's thicker than PCMCIA 2.0 specifications allow), and also
- there is currently no software driver available for PCs.
-
- The Squirrel is a small, black, plastic box about the size of a
- credit card but much thicker (about one centimetre). It has an (ugly) yellow
- sticker on top. The cable is fixed to the casing and has a standard 50 pin
- Centronics-style connector on the end. It's about 40 cm long, which is quite
- short.
-
- The Squirrel device driver is fully compatible with Commodore's
- standards for SCSI host adapters. It uses RDB (Ridged Disk Block), and you
- can use HDToolBox to partition hard disks.
-
- The Squirrel comes with three disks of software. The first one
- contains the software needed to operate the interface (the device driver,
- HDToolBox, SCSIMounter, Installer and the CD32 emulator). The other two
- disks contain useful stuff from the Aminet ftp sites in LhA archived form.
- The software version included was 1.06.
-
- All SCSI devices that I had available (Quantum LPS 52 and Quantum
- Lightning 540 hard disks, Archive DAT tape streamer, NEC CDR-25 CD-ROM
- reader) worked fine with the Squirrel. The hard disks obtained the same
- speed as on an A3000. The DAT tape streamer was tested with AmiBack and the
- TapeWorm filesystem. The CD-ROM reader was tested with Commodore's
- CDFileSystem that is part of Workbench 3.1.
-
- I also tried to format a hard disk partition with Professional Filing
- System by Michiel Pelt, but SCSIMounter doesn't seem to work with PFS
- partitions. I didn't succeed in making a mount file for it, but it should be
- possible.
-
- I wasn't able to test the CD32 emulator software that is part of the
- Squirrel package because of the lack of CD32 titles on my part.
-
-
- PERFORMANCE
-
- I've tested the Squirrel using DiskSpeed 4.1 with a Quantum
- Lightning 540S that is normally used in my A3000. These are the results.
-
- MKSoft DiskSpeed 4.1 Copyright ) 1989-91 MKSoft Development
- ------------------------------------------------------------
- CPU: 68030 OS Version: 39.106 Normal Video DMA
- Device: QD1: Buffers: 30
- Comments: Squirrel + Quantum 540, FFS Intl
-
- CPU Speed Rating: 1556
-
- Testing directory manipulation speed.
- File Create: 29 files/sec | CPU Available: 0%
- File Open: 124 files/sec | CPU Available: 0%
- Directory Scan: 352 files/sec | CPU Available: 0%
- File Delete: 219 files/sec | CPU Available: 0%
-
- Seek/Read: 93 seeks/sec | CPU Available: 0%
-
- Testing with a 262144 byte, MEMF_FAST, LONG-aligned buffer.
- Create file: 938540 bytes/sec | CPU Available: 0%
- Write to file: 1079994 bytes/sec | CPU Available: 0%
- Read from file: 1223768 bytes/sec | CPU Available: 0%
-
- Average CPU Available: 0% | CPU Availability index: 0
-
- The results are roughly the same as on my A3000, and in some cases
- even slightly faster. As you can see, the Squirrel achieved about 1.2 MB/sec
- when reading from a file. According to HiSoft, the Squirrel can
- theoretically obtain 3 MB/sec data transfers on an accelerated A1200.
-
- The big difference on the A1200 compared to the A3000 is that the
- Squirrel leaves 0% CPU available on the A1200, effectively blocking
- multitasking during SCSI transfers, while the A3000 leaves 46% free on
- average (77% during reads).
-
-
- DOCUMENTATION
-
- The documentation is very good. It looks very professional and
- explains all the technical details you might want to know. I do miss a
- troubleshooting chapter with simple 'What To Do If...' questions and answers.
-
-
- LIKES
-
- The Squirrel gives good value for money. It works as expected and
- has good performance, nice documentation and good support.
-
-
- DISLIKES AND SUGGESTIONS
-
- The casing could be better, especially the lid that stuck out,
- preventing the Squirrel from being inserted. The cable is a little bit on
- the short side. The Squirrel doesn't have automounting or autobooting
- capabilities, so you must have an internal hard disk or use a boot disk. The
- driver leaves 0% CPU available during SCSI transfers, which is not a nice
- thing on a multitasking computer. I hope HiSoft can fix this in a future
- update of the driver software.
-
-
- COMPARISON TO OTHER SIMILAR PRODUCTS
-
- There are other SCSI host adapters for the PCMCIA port, but they can
- only be used on PCs since there aren't any Amiga drivers available for them
- (yet?). The cheapest one I've seen for the PC was almost twice as expensive
- as the Squirrel, so PC owners: eat your heart out!
-
- Another possibility would be to use a SCSI adapter that connects to
- the trapdoor expansion slot of the A1200. I've personally only seen the GVP
- in action, and it is also a fine product.
-
-
- BUGS
-
- None that I have encountered.
-
-
- VENDOR SUPPORT
-
- The Squirrel SCSI Interface comes with 30 days of free technical
- support, which is available by telephone, letter or fax. I've also seen
- employees of HiSoft present on the Internet, and the update to version 1.05
- of the software (1.06 is the current version) was placed on Aminet.
-
- At extra cost, it's also possible to get extended support called
- Silver and Gold Support which gives you lifetime support and access to a
- support conference on CIX and to their own BBS and free software updates.
- These extended support schemes seem a bit expensive to me.
-
-
- CONCLUSIONS
-
- I can recommend the Squirrel to anyone who wants to add a CD-ROM or
- other SCSI devices to his/her A1200. If only HiSoft could manage to change
- the driver so that it doesn't totally block multitasking during SCSI
- transfers, then things would be even better.
-
-
- COPYRIGHT NOTICE
-
- This review is freely distributable. It was written by Edmund
- Vermeulen (edmundv@grafix.xs4all.nl). The Squirrel Interface used for this
- review belongs to Alex van der Voort.
-
- ---
-
- Daniel Barrett, Moderator, comp.sys.amiga.reviews
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