Question about mediator ZIII/PCI and dma

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mlehto
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Question about mediator ZIII/PCI and dma

Post by mlehto »

It is been bit unclear for me. If one have Mediator PCI 4000D, does DMA work with ZIII cards as normal ?

Is there been any progress with PCI DMA ? I have itch, that it is most likely impossible to make, but I ask anyway.

Does ZorRam config as ordinary fast mem in OS4.1 ?

Thanks :)
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ssolie
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Re: Question about mediator ZIII/PCI and dma

Post by ssolie »

mlehto wrote:Does ZorRam config as ordinary fast mem in OS4.1 ?
No, it can only be used as swap. The memory is far too slow to be used as ordinary fast memory.
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mlehto
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Re: Question about mediator ZIII/PCI and dma

Post by mlehto »

Ok, thanks.

How it is with dma in os4 classic. Is it working only to cyberstorm scsi, or allso to Z3 ?

I have allready two os4 machines, but for some reason I'm planned to get A4000. Should be nice to run OS4 with it :)
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danbeaver
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Re: Question about mediator ZIII/PCI and dma

Post by danbeaver »

OS 4.1 in its current state supports DMA only with the CyberStorm UW SCSI device. Any other card trying to use DMA fails or locks up the system. This is the current paradigm; were a shift to occur, the whole kernel would have to undergo a rewrite -- at least this is what I have gleaned from the forums and the code itself.
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