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Question about mediator ZIII/PCI and dma
Posted: Fri Feb 15, 2013 3:06 pm
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
Re: Question about mediator ZIII/PCI and dma
Posted: Fri Feb 15, 2013 8:20 pm
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.
Re: Question about mediator ZIII/PCI and dma
Posted: Sun Feb 17, 2013 12:48 pm
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
Re: Question about mediator ZIII/PCI and dma
Posted: Tue Feb 19, 2013 2:16 am
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.