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Statements

Subject Item
dbr:WDMA_(computer)
rdf:type
dbo:Software
rdfs:label
WDMA (computer)
rdfs:comment
The Word DMA (WDMA) interface was the fastest method used to transfer data between the computer (through the Advanced Technology Attachment (ATA) controller) and an ATA device until Ultra Direct Memory Access (UDMA) was implemented. Single/Multiword DMA took over from Programmed input/output (PIO) as the choice of interface between ATA devices and the computer.The WDMA interface is grouped into different modes. the category
dcterms:subject
dbc:AT_Attachment
dbo:wikiPageID
7299186
dbo:wikiPageRevisionID
1097122784
dbo:wikiPageWikiLink
dbr:Megabyte dbc:AT_Attachment dbr:1_E-9_s dbr:CompactFlash dbr:Ultra_Direct_Memory_Access n13:output dbr:Advanced_Technology_Attachment dbr:Microcontroller
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n5:4xPBH wikidata:Q7948464 freebase:m.025yk3q
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dbo:abstract
The Word DMA (WDMA) interface was the fastest method used to transfer data between the computer (through the Advanced Technology Attachment (ATA) controller) and an ATA device until Ultra Direct Memory Access (UDMA) was implemented. Single/Multiword DMA took over from Programmed input/output (PIO) as the choice of interface between ATA devices and the computer.The WDMA interface is grouped into different modes. In single transfer mode, only one word (16-bit) will be transferred between the device and the computer before returning control to the CPU, and later it will repeat this cycle, allowing the CPU to process data while data is transferred. In multiword transfer mode (block mode), once a transfer has begun it will continue until all words are transferred. Two additional Advanced Timing modes have been defined in the CompactFlash specification 2.1. Those are Multiword DMA mode 3 and Multiword DMA mode 4. They are specific to CompactFlash. Multiword DMA is only permitted for CompactFlash devices configured in True IDE mode. the category
gold:hypernym
dbr:Method
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wikipedia-en:WDMA_(computer)?oldid=1097122784&ns=0
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wikipedia-en:WDMA_(computer)