ISA DMA: Difference between revisions

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ISA DMA (view source)

Revision as of 22:47, 15 February 2010

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Line 528:
</pre>
 
'''Comment: Due to problems with autoinit on real hardware and MS Virtual PC, you shouldmight better avoid autoinit and use this code:'''
 
<pre>
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out 0x0a, 0x06 ; mask DMA channel 2
out 0x0b, 0x4A ; 01001010
; single transfer, address increment, autoinit, write, channel2)
out 0x0a, 0x02 ; unmask DMA channel 2
ret
Line 541:
out 0x0a, 0x06 ; mask DMA channel 2
out 0x0b, 0x46 ; 01000110
; single transfer, address increment, autoinit, read, channel2)
out 0x0a, 0x02 ; unmask DMA channel 2
ret
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