[Forum] Articia: Still DMA-problems? | ANN.lu |
Posted on 20-May-2003 11:16 GMT by Senex | 122 comments View flat View list |
From a news-item at VGR.com it appears that the current Articia-northbridges might still have DMA-related problems:
"Mr. S.W. who sends over screen shots of newer AmigaOne 800mhz G4 hardware, has sent over 2 screen shots of the new A1 with G4 running 'amigaone xe/g4 7451 800mhz, excalibur radeon 9000 pro 64mb ddr ram, valueram kvr133x72rc3/256 kingston'. He wants to know '.. if other aone users have that problem as well..', 'it never outputs the same checksum with dma enabled when testing an iso file which is larger than the swap space used'
You can see the Radeon 9000 Pro screen shots here: DMA On & DMA Off."
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Articia: Still DMA-problems? : Comment 25 of 122 | ANN.lu |
Posted by corpse on 20-May-2003 13:41 GMT | "He wants to know '.. if other aone users have that problem as well..', 'it never outputs the same checksum with dma enabled when testing an iso file which is larger than the swap space used'"
The openBSD tars seemed to self destruct on my x86 machine, cause the MD5 sums would randomly go from valid to invalid and back again. Turned out to be: defective RAM and the connector of the ATA100 cable connected to the drive.
It seems the MAI chip is fussy about RAM so it may be one(or more)of the modules your using isn't up to being used in the AmigaOne or that its faulty. IIRC the AmigaOne uses the VIA686B which is known for data corruption with certain devices connected to the PCI bus(e.g. SBLive) and in heavey load conditions, Both can be fixed by using a driver set with the required fixes or by patching the PCI registers to extend the latency slightly. |
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