Messages in this thread | | | Date | Fri, 18 Dec 1998 16:42:44 -0500 | From | Mark Lord <> | Subject | Re: Second Thought (Re: Re[2]: Small error?? in IDE dma processing?) |
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"Andre M. Hedrick" wrote: > > First lets run some system crashes...........(which I did)....even worse!! > > Then look at the ATA/ATAPI-4 spec T13-1153D Revision 17 30-Oct-97 page 234, > again. The flow charts on DMA procedure to my reading again (not late at > night in a dimly lit room at 1am). > Both branches of the test 0IEN=0 : > > At test DEVICE: nIEN=0 ? > > No -> Host : Read of Status register is recommended. > NOTE : Status register is read to clear pending interrupt.
I have not looked at the DOCs for this, but..
Would you suppose that whatever you are looking at might mean the "drive status register" (which has the effect of clearing a pending interrupt) rather than the DMA status register (which has no effect). ...
-ml
-- mlord@pobox.com
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