home *** CD-ROM | disk | FTP | other *** search
- Path: menudo.uh.edu!usenet
- From: htweedie@madhat.actrix.gen.nz (Hamish Tweedie)
- Newsgroups: comp.sys.amiga.reviews
- Subject: REVIEW: Two Meg Agnus Project
- Followup-To: comp.sys.amiga.hardware
- Date: 23 Nov 1993 01:11:12 GMT
- Organization: The Amiga Online Review Column - ed. Daniel Barrett
- Lines: 305
- Sender: amiga-reviews@math.uh.edu (comp.sys.amiga.reviews moderator)
- Distribution: world
- Message-ID: <2crnvg$a0j@menudo.uh.edu>
- Reply-To: htweedie@madhat.actrix.gen.nz (Hamish Tweedie)
- NNTP-Posting-Host: karazm.math.uh.edu
- Keywords: hardware, kit, do it yourself, DIY, Agnus, A500, A2000, commercial
-
-
- PRODUCT NAME
-
- The Two Meg Agnus Project. Version 5.0d3 22-Sep-1993.
-
- BRIEF DESCRIPTION
-
- A user-installed kit which allows Amiga 500 and 2000 computers to
- have 2 megabytes of Chip RAM by using an updated Agnus chip. It is
- user-installed, and optionally may be ordered preassembled.
-
- Information is available on all Aminet ftp sites in the file
- /pub/aminet/hard/hack/2megagnus50d3.lha.
-
-
- AUTHOR/COMPANY INFORMATION
-
- Name: Structured Applications and Designs Inc.
- Address: P.O. Box 60414
- San Diego, CA 92166
- USA
-
- E-mail: ttmaphelp@struad.cts.com
-
-
- LIST PRICE
-
- The board may be purchased in a number configurations. (Note all
- prices are given in US dollars.)
-
- Board fully ASSEMBLED, with RAM: $88.95
- Board fully ASSEMBLED, with NO RAM: $64.95
- Board NON-ASSEMBLED, with PARTS and with RAM: $79.95
- Board NON-ASSEMBLED, with PARTS but with NO RAM: $54.95
- Board NON-ASSEMBLED, with NO PARTS and NO RAM, (Bare
- printed circuit board): $50.95
-
- In addition, you may purchase the following options:
-
- 2 meg Agnus chip, part number #318069-03: $35.00
- PLCC Agnus extractor tool: $ 4.95
- Piece(s) of insulator: $ 0.95 each
- 68000 socket extender: $ 4.95
-
- As you can see, a fully assembled board can be purchased for $128.90
- -- main board ($88.95), Agnus chip ($35.00), and Agnus extractor tool
- ($4.95) -- which is markedly cheaper than the prices I have seen advertised
- in AmigaWorld Magazine (approximately $196.50 (US)). Furthermore, you get to
- support Amiga PD developers :-). I purchased the NON-ASSEMBLED version with
- parts and RAM option for $79.95, plus the Agnus chip and the extractor tool,
- costing $119.90 in total (plus postage).
-
-
- SPECIAL HARDWARE AND SOFTWARE REQUIREMENTS
-
- HARDWARE
-
- This project will work on all Amiga 500's, and all late
- model Amiga 2000/2500's. This means that any Amiga 2000
- which has the older Amiga 1000 DIP-style Agnus will not work
- (i.e., those Amiga 2000's produced in Germany).
-
- It will not work on an Amiga 600, 1000, 1200, 3000, 4000 or
- CDTV.
-
- If you have an Amiga 500, you'll require an extra 512K RAM
- in the belly slot to expand memory. If you intend to
- install the project in an Amiga 2000, then you should already
- have 1MB installed on the motherboard; and even if you
- currently have only 512K set as Chip RAM, instructions are
- included for the conversion.
-
- The following hardware is required for the conversion:
-
- 1: If the kit is already assembled, then you require only
- the $4.95 PLCC chip extractor tool (definite requirement)
- plus the 2MB Agnus chip.
-
- 2: If you purchased a non-assembled kit, the following is
- required to complete the installation:
-
- - Any parts listed under "LIST PRICE", above, that
- were not supplied with the kit.
- - PLCC chip extractor tool.
- - soldering iron.
- - solder.
- - flat blade screw driver (useful).
- - X-Acto or similar knife.
- - magnifying glass (optional, but very useful).
- - multimeter (optional).
- - tin snips.
-
- I presume it works with all faster CPU's. Mine is currently
- very happy running with a GVP 22Mhz 68030 Combo accelerator
- board. Note that if you have a board which covers the Agnus
- socket you may have problems, and should consult the
- documentation in the archive, or the authors.
-
-
- SOFTWARE
-
- None.
-
-
- COPY PROTECTION
-
- None.
-
-
- MACHINE USED FOR TESTING
-
- - Amiga 2000.
-
- - Initially, 1MB Chip RAM and 7MB Fast RAM.
-
- - Tested on Kickstart 37.175 (2.04) and Workbench 38.12. Also booted
- up in Kickstart/Workbench 1.3 and everything appears OK (not fully
- tested).
-
- - Running GVP 22Mhz 68030 Combo board. Works fine with hard drives
- attached to the SCSI bus. Set up has 2MB 16bit Fast RAM (A2058
- board) and 5MB 32bit RAM (Combo board). GoldenGate II board also
- running with two extra PC serial lines. CBM deinterlacer. All
- appear compatible.
-
- - All software that I ran appears compatible.
-
-
- INSTALLATION
-
- [MODERATOR'S NOTE: If you are not comfortable opening up your
- Amiga, then you should have the work done by an authorized Amiga
- service center. Careless work may damage the computer. - Dan]
-
- The old Agnus has to be removed (and for this, the PLCC chip
- extractor is an absolute requirement). The new board is then inserted into
- the motherboard socket left vacant by the Agnus chip, and a wire lead is
- attached to a pin on the 68000 (I used the 68000 attachment, even while
- running an 030) or the Gary chip. That's it!
-
- The installation was dead easy, and the only worry was static
- discharge from myself (I didn't use a static mat or strap... slap on wrist!
- :-))
-
-
- REVIEW
-
- The project assembly was much easier than I had suspected. The
- board is well laid out with everything clearly marked, and thus is of good
- quality. All boards come with the PLCC plug soldered to the board, due to
- the difficulty of this operation.
-
- The assembly in its basic form consists of the following (note that
- this only applies to the kitset boards):
-
- 1) Solder PLCC socket to the PCB. Not difficult, but it requires a
- little care and accuracy.
-
- 2) Solder in the three SIP resistor packs. Very easy.
-
- 3) Solder in the nine capacitors into the board. Very easy.
-
- 4) Solder the clip lead to the board (already assembled on kitset
- boards). Very easy.
-
- 5) Solder the eight RAM chips to the PCB. This was a little harder
- as I was worried about static and overheating the chips, and so it
- required a bit of precision and a speedy hand on the soldering iron.
-
- 6) Solder the 24-pin PAL chip to the PCB. Same skill level as above.
-
- 7) Install the 2 Meg Agnus chip into the socket on the board. Pretty
- simple.
-
- 8) Install, as mentioned above in previous section.
-
- This process took me about an evening to complete (say 7:00pm to
- 1:00am... yes I was enjoying myself that much :-)). But the work could
- easily be split up over multiple periods, as recommended in the
- documentation, to ensure that a high standard of work is achieved. Mine
- turned out pretty fair. The soldering wasn't production line quality, but
- is reasonably respectable. I found it easier to solder the pins on chips,
- sockets, etc., after they had been bent a few degrees (note I was *very*
- careful doing this!).
-
- Note that none of the above applies to the complete, fully
- assembled project, which arrives the same as the commercial products (with
- the exception of the higher price tag).
-
- Overall, I obtained a great deal of enjoyment. This was the second
- board I have soldered (the first being the Multi-Kickstart, also produced by
- Structured Applications and Designs), and found it much easier to complete
- than the previous one. Basically, if you can plug a soldering iron in, and
- handle it with a small degree of proficiency combined with a desire to
- produce work of a decent standard, you shouldn't have much hassle assembling
- the project. The instructions are a breeze to work through and provide a
- step-by-step assembly and instruction method which is easily understood,
- even by somebody as electronically inept as I am!
-
- Overall if you're not going to upgrade to a new Amiga, yet require
- or would like 2MB of Chip RAM, then this is the cheapest path to achieving
- your goal. Don't be scared by the skill required to assemble the project or
- the time taken to assemble it, as both are negligible.
-
- How useful is the extra 1MB of Chip RAM? Well now I can multitask a
- lot better, running numerous windows and doing a number of tasks that
- previously I could not do (e.g., read my news with Grn, while downloading
- with JRComm, while viewing IFF's). It has turned me into a bit of a slob
- though, as I tend to leave more windows open. :-) It also aids those of us
- that *have* to use MagicWB.
-
-
- DOCUMENTATION
-
- This consists of the assembly, installation and compatibility files
- that accompany the Public Domain archive on Aminet. These ASCII files are
- also accompanied by a number of IFF pictures which aid the assembly and
- provide complete schematics for the project (i.e., PCB layouts, etc).
-
- The documents are superb, and provide a step by step description of
- both the assembly and installation process which are easy to follow. There
- are even IFF pictures of parts which may be hard to identify for the
- beginner (e.g., capacitors, chips, etc).
-
- Also included in the documents is an order form and description of
- how the project works and the theory behind it.
-
-
- LIKES AND DISLIKES
-
- I believe that the project is brilliant! It provides a cheap way to
- upgrade your Chip RAM while introducing the beginner to a project which
- provides a great deal of satisfaction and builds confidence (is this a good
- thing with static sensitive electronics ;-)).
-
- I have no complaints about the quality of materials involved, the
- documentation, nor the implementation of the whole project.
-
-
- COMPARISON TO OTHER SIMILAR PRODUCTS
-
- The project is a Public Domain implementation of similar commercial
- products available, such as the DKB MegaChip product. I haven't used or heard
- any complaints about the commercial products.
-
-
- BUGS
-
- None known.
-
-
- VENDOR SUPPORT
-
- I had to contact the authors, Neil Coito and Michael Cianflone,
- several times via email concerning a delivery date. Both times they were
- helpful and courteous. The problem was that new circuit boards were being
- produced and delays had occurred. The product arrived (after a delay in
- Customs) at approximately the time specified by the authors.
-
- Both authors offer themselves in the documentation as available for
- consultation if any problems are encountered. Once the board arrived I had
- no problems nor need to consult.
-
- I am not affiliated with the company in any way except as a
- customer.
-
-
- WARRANTY
-
- There appears to be no warranty. It is mentioned in the documents,
- that if a part is defective, then contact Structured Applications for help,
- and I presume replacement parts are free of cost. All the boards are sent
- out fully tested, apparently.
-
-
- CONCLUSIONS
-
- I consider the project brilliant, and hope that further projects of
- this type appear for/from the Amiga community. It is well executed in terms
- of both documentation and hardware. It achieves its aims, and appears to be
- at least on a par with commercial products.
-
- If forced to give a rating, at this stage I would give it 4 out of
- 5. The remaining star depends upon the long term reliability of the
- product, which at this stage I have few doubts about. If it stays as
- reliable as it currently is, then I would happily recommend 5 out of 5!
-
-
- COPYRIGHT NOTICE
-
- Copyright 1993 Hamish Tweedie. All rights reserved.
-
- This review may be distributed freely provided 'gobs' of money are
- not earnt from it (huh, some chance!).
- ===> htweedie@madhat.actrix.gen.nz Bombora/Ross 780 sailor|
- ===> OR tweedie_h@kosmos.wcc.govt.nz | RZ350, R65,|
- "Stretch yourself.........get morphed!" | K75S rider.|
-
- ---
-
- Daniel Barrett, Moderator, comp.sys.amiga.reviews
- Send reviews to: amiga-reviews-submissions@math.uh.edu
- Request information: amiga-reviews-requests@math.uh.edu
- Moderator mail: amiga-reviews@math.uh.edu
- Anonymous ftp site: math.uh.edu, in /pub/Amiga/comp.sys.amiga.reviews
-