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Author Topic: One for Jose  (Read 2298 times)

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Offline patrik

Re: One for Jose
« on: November 23, 2004, 12:07:26 AM »
@Jose:

Approximately 9MB/Sec seems to be what the PicassoIV was designed to manage, according to the people who constructed it. A quote from VGR's PicassoIV info-page:

"Q:UPDATE:Does the Zorro2PCI-brigde updated for older PicassoIV's really get 14Mb/sec rahter then 9Mb/sec?
A:UPDATE:Yes, Interim versions had some higher speed, but they proved out to be instable in certain environments. This was a matter of metastability in interfacing to asynchronous Zorro bus to the synchronous PCI bus. Stability demanded an additional synchronising latching stages that I removed during redesign and I had to put them back in for stability. This re-introduced delays that decrease the speed back to the original one.
As I wrote in my other message there were decisions "stability or speed" to be made and I opted for stability for IMHO obvious reasons. (Klaus Burkert PML 03 Aug 1998)"

(edit):

9MB/Sec for the PicassoIV is not too bad. It's quite good compared to the CyberVision64/3D which manages 6MB/Sec, but quite bad compared to the CyberVision64 which manages 16MB/Sec.


/Patrik