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#!/bin/rc
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# dmaon [/dev/sd??/ctl ...] - turn on ide dma, if possible
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rfork e
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if (~ $#* 0)
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	* = /dev/sd[C-H]?/ctl
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for (ctl)
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	if (test -e $ctl && grep -s '^config .* dma ' $ctl &&
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	    ! grep -s '^config (848A|.* dma 00000000 )' $ctl)
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		echo 'dma on' >$ctl