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#2401 |
electricky.
Join Date: Jun 2010
Location: out in the wild
Posts: 1,256
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#2402 |
Registered User
Join Date: Apr 2010
Location: Athens,Greece
Posts: 28
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Some questions.
Is it safe after all to use 80MHz OSC on the ACA630 ? Can i remove the current CPU and replace it with Ceramic PGA ? Also can the memory raised to 64 or 128 using same type chips ? Or this has to do with the initial programming ? When the ACA will become available again ? Thanks. |
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#2403 | |
electricky.
Join Date: Jun 2010
Location: out in the wild
Posts: 1,256
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No, it isn't. See further back in this thread for detailed technical explanation.
Yes, you can. Doesn't make sense, but you can. Quote:
Not in the form that the ACA630 came in, as that was too expensive. I'm thinking of a lower-cost, lower-performance version for the A600. Jens |
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#2404 |
Moderator
Join Date: Nov 2004
Location: Eksjö / Sweden
Posts: 5,657
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Suggestion for a future accel:
- A1200 card with no CPU or memory - Just a 68060 socket and 1-2 sockets supporting up to 512MB of the abundant PC DDRx memory This will ensure the prolonged life of high end Amigas while you get rid of the expenditure for CPU and memory. And you could give a modest rebate if buyers send in working or non-working Apollo cards, then you could get rid of those. |
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#2405 |
Registered User
Join Date: Nov 2005
Location: Sweden
Posts: 749
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And the card would of course have a switch / jumper cluster, as well as a flexible clock frequency generator so it could run on both 68040 & 060 CPU's.
However, i see issues here. A buyer with a flaky CPU will inevitably blame the card, the CPU was bought as "working pull" from some asian guy... Makes it a nightmare to support. And the sort of optimization Jens is doing to push the performance from the CPU's would be impossible with a wide variety of CPU & memory combinations. B! |
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#2406 |
Registered User
Join Date: Sep 2005
Location: Peterborough
Age: 47
Posts: 855
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Jens - So, just coz I can't stand suprises, when you stated earlier that they " heat transfer pads will be fixed for shipping with an Amiga-related item..." does that mean we'll be getting a bonus item of some sort??!?!
Don't get me wrong, the fact that you're making such great hardware is good enough but I was just intrigued by your statement. |
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#2407 | |||
Moderator
Join Date: Nov 2004
Location: Eksjö / Sweden
Posts: 5,657
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Quote:
Quote:
![]() That's why he's been building cards only with chips (CPUs and RAMs) that are NOS, and that's why we've gotten 68030 cards and not any 68060 cards. If we don't want to downgrade to 68030s when all the 68060 cards eventually die, we must support this "I only guarantee the board". (Unless someone else makes such a board or full 68060 accels that come with test CPU and memory, of course.) Quote:
I don't see a combination problem that could crop up. Blizzard/Apollo already supports PC memory. CPU timings are history, and there are cheap off-the-shelf chips to talk to a generic PC RAM of the type that he chooses. Even within the type he could support a quite narrow range of RAMs and there would still be thousands of stores that would have it in stock. Last edited by Photon; 08 March 2012 at 21:47. |
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#2408 | |||
Registered User
Join Date: Nov 2005
Location: Sweden
Posts: 749
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Quote:
Quote:
Quote:
B! |
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#2409 | |
Paranoid Amigoid
Join Date: Mar 2008
Location: Athens/Greece
Age: 45
Posts: 1,978
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Quote:
![]() Very well designed and with very good information even for people that never used a heatsink before in their life. The Amiga-related item is an original Lisa chip that holds the transfer pad in place as you can see from the picture bellow. Thanks for this Jens ![]() |
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#2410 |
Registered User
Join Date: Mar 2012
Location: Newark
Posts: 13
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Cooler added?
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#2411 |
Ruler of the Universe
Join Date: Mar 2010
Location: Lanzarote/Spain
Posts: 6,195
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#2412 |
Registered User
Join Date: Mar 2012
Location: Newark
Posts: 13
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so bad?
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#2413 | ||
Moderator
Join Date: Nov 2004
Location: Eksjö / Sweden
Posts: 5,657
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Quote:
Quote:
I hope you understand that the reason to buy any hardware from Jens at all is because you want a continuation of Amiga? Because WinUAE can already run software faster than his accels to date and extremely compatible, and with a lot of extras like no need to buy an Indivision for a PC screen. Let's make it a high end continuation of Amiga, is my simple suggestion ![]() |
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#2414 |
Registered User
Join Date: Mar 2012
Location: Newark
Posts: 13
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any opinions? my rom 3.0
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#2415 | |||
Registered User
Join Date: Nov 2005
Location: Sweden
Posts: 749
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Quote:
Quote:
Quote:
B! |
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#2416 | |
Italian Amiga Zealot
Join Date: Jan 2009
Location: Italy
Age: 36
Posts: 1,913
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Quote:
Knowing that, having users add RAM and CPU by themselves would mean a lot of support tickets like "your card sucks, it doesn't read my RAM", just because it has crappy timings or it's incompatible with the card for some strange reason - that said, I don't foresee Jens EVER going that route. We have to hope in another Amiga hardware dev, or in a free open-sourced PCB (which should be four-layered to support 68060, iirc?) project and have people build them by themselves ![]() |
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#2417 | ||
Moderator
Join Date: Nov 2004
Location: Eksjö / Sweden
Posts: 5,657
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Quote:
Are you daft for real? Quote:
However, a 68030 with FPU in FPGA would be hopelessly slow compared to 68060 even at 600 MHz. On top of which this would create a condition where someone would spend years making such a one before a card could be made. You're replacing the possible with things that aren't here yet, while I'm proposing that a card with sockets that could be made cheaper and in larger volume than a custom card. I would actually buy a 100% compatible humble 68000 CPU and Amiga chipset remade in FPGA the second it was put on the market. It seems you haven't read my passionate posts on this subject, but this is a dream vision for me. However, my suggestion is a different product altogether. It's a CPU board for non-FPGA CPUs. jbenam: I have heard of Jens' dislike for Apollos and am proposing a replacement to get them off the 'market' and get him in control. Do you know of any better way to make Jens happy? ![]() That said, the ACA series do have support tickets, all the more reason a generic card with narrow specs and no responsibility/limited warranty period should be more attractive for a developer. The dev could of course sell the cards with CPU and RAM tested and ready, but accept responsibility only for the board as at least the CPU would be a used part. But I think it IS an important point to separate the board from the replacement parts since some time in the future every user would need to replace socketed parts. Last edited by Photon; 10 March 2012 at 00:37. |
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#2418 | |||
Registered User
Join Date: Nov 2005
Location: Sweden
Posts: 749
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Quote:
But then your not looking for replacement, your looking to change the memory, for some reason or another, trying to prove that 72 pin memories in some arbitrary way is "better". Quote:
Quote:
B! |
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#2419 | ||
electricky.
Join Date: Jun 2010
Location: out in the wild
Posts: 1,256
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Quote:
There has been a case in Germany where a "clever businessman" wanted to sell light bulbs as "heat bulbs". Essentially the same that you're trying here: He claims that the purpose is to produce heat, not light, so he wanted to get around the "energy-saving lamps only" directive for any light bulb over 75W that has been in place since last year. Guess what - he failed in court. I would most probably fail the same way if I declare a card "for viewing purpose only". Quote:
However, it does not make sense to use DDR, because their first-access-penalty is not faster than the first-access-penalty of 200MHz SD-Ram, which is what I'm using on my new accelerators. However, it took me ages to dig up that type of memory. Many SD-Ram vendors have specified 200MHz types, but they have never brought it to the market. Even though I'm not running the chips at 200MHz, they still save me a cycle here and there, which would be impossible with off-the-shelve 166MHz types. Even though I have designed the ACA1230 and ACA1231 cards with as little user options as possible, they still cause an enormous amount of support work. Seeing that even the battery for the RTC causes support work, I would NEVER let the user exchange anything critical like a CPU or memory. Here's where EU laws come in again: If the user has the possibility to make a mistake and it's technically possibe to avoid damage, then the product designer must do it. For me, this would mean that I'd have to build a sensing circuit that automatically sets CPU core voltage if you're upgrading from 68040 to 68060. This would be assimung that I'd include an 800,- EUR tool with every card, because without a PGA-18 puller, you WILL scratch and dent the CPU socket, which essentially de-values the card. Imagine someone buys a card without a CPU, inserts something that he just happens to have, and then finds out that the card doesn't do what he wants. EU laws permit him to send the card back within 14 days without even saying why - a short note like "please refund" is enough, and the reseller has to take back the card. Can you imagine the kind of hassle if the reseller has to take back a card with a scratched CPU socket? Can you imagine how many customers would accept a card with a scratched socket in the first place? None at all. I would think that only one person that's reading here has access to a PGA-18 puller. None of the resellers I'm working with has such a tool, and I'm pretty sure that none of them will buy something like that. Is that a bad thing? Surely not. Those of you who are now thinking that EU directives are holding us back should reconsider their opinion. EU directives protect the customer, and it's good that way. You're getting a product that's guaranteed to be fit for the purpose you've bought it for. And if you later find out that you got the wrong idea about the product in the first place, you don't lose any money. To avoid that situation, vendors and resellers must be as honest and as precise as possible in their product description. Jens Last edited by Schoenfeld; 20 August 2013 at 22:44. |
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#2420 |
Registered User
Join Date: Apr 2011
Location: birmingham
Age: 55
Posts: 2,827
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i agree with what youve said.(the laws are very strict on this matter for a reason)
but surely theres a work around for peaple that have a "known working" cpu,by this i mean anyone who wants to do such a thing could send you the cpu at there cost.(with a list of revisions of mask sets tested by you as a comparison) then if it dont work with your card,you can simply remove it with your tool and send it back at the cost of the person who sent it to you.(admittedly you have to have someone do the testing) which is probably the main reason for such a card not being made in the first place.(by this i mean the cost of the cpu) the testing could be done at the time the card is being tested itself,altough i beleive this could be time consuming so maybe it could be a separate thing done when the card has to have the cpu inserted(this may be counter productive i know as you probably have to contract out a production line for the card assembly,and i dont know wiether you test the cpu sepratley from this) as for the memory,128-256mb would be great for most peaple wouldent the sdram interface on your aca's work with an 060?just a thought. Last edited by roy bates; 12 March 2012 at 11:53. |
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