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