27 lines
896 B
Plaintext
27 lines
896 B
Plaintext
AST RESEARCH TECHNICAL BULLETIN TB-0030 7-17-84
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DMA CHANNEL ASSIGNMENT IN THE IBM PC AND XT
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When interfacing products to the IBM PC or XT, which use Direct
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Memory Access (DMA), it is necessary to insure that there is not
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a conflict with a device using the same channel.
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The following table shows the channels and their assignments.
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ADD-ON
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CHANNEL IBM ASSIGNMENT ASSIGNMENT
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DMA 0 IBM MEMORY REFRESH NONE
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DMA 1 IBM - SDLC AST-PCOX - STD
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AST-PCNET
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DMA 2 IBM - FLOPPY DISK NONE
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DMA 3 IBM - HARD DISK AST-PCOX (Alt.)
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OTHER HARD DISK
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