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Author Topic: New PCI board for A1200: Mediator 1200 TX  (Read 9794 times)

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Offline AndrewBell

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Re: New PCI board for A1200: Mediator 1200 TX
« on: February 23, 2008, 02:21:56 AM »
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Maybe I'm wrong, but my guess is that they didn't bother to engineer DMA because the Meditator was intended to host a PPC processor board, and it would only use the system's existing processor/memory to bridge the gap until the PPC board was available.


According to a post on another site, the lack of DMA is due to a 8MB data transfer "window". This "window" is a limitation of the A1200 expansion bus, so no busboard will ever have DMA.

As for the Shark, you'll never see it. They are out of production.
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« Last Edit: February 16, 2011, 04:58:17 AM by AndrewBell »
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Offline AndrewBell

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Re: New PCI board for A1200: Mediator 1200 TX
« Reply #1 on: February 23, 2008, 02:50:50 AM »
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That doesn't entirely explain why the other Meditators don't DMA


Are you referring to the A3000 and A4000 models? I don't know what the problem with them is.

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maybe they will never have DMA to the host system, but they obviously have DMA to the video card, and could theoretically have DMA to a memory board, or, a processor board with memory.


Without a processor in a PCI slot, DMA from the host system is the only DMA that matters. And there are no processor cards for PCI.

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just because production stopped doesn't mean it can't be started again if it is profitable


No, but ROHS compliance does. That and the components no longer being manufactured. That's why CyberstormPPCs are not being made.

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But, what's to say someone isn't working on a different design?


Who would be the customers? A few hundred Amiga users. The Mac market for these products is also dead. With Apples move to Intel, anyone wanting to upgrade a PPC Mac can buy an old machine pretty cheaply.

I'd love to be proved wrong, but the opportunity to create new Amiga PPC processor upgrades was missed. The rest of the world moved on.
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« Last Edit: February 16, 2011, 04:58:26 AM by AndrewBell »
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Offline AndrewBell

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Re: New PCI board for A1200: Mediator 1200 TX
« Reply #2 on: February 23, 2008, 05:23:48 PM »
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okay so elbox have alot of mediator cards and now they have updated them with soldering a atx connection burnt new chips with new faster code.. great way to refurbish old stock eh...


That was my thought about this new Mediator.
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« Last Edit: February 16, 2011, 04:58:39 AM by AndrewBell »
Use the best: Linux for servers, Mac for graphics, Windows for Solitaire.