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Q: Is there anything wrong with the following text from ATA/ATAPI-4? 7.7.4 Effect PIO out data transfers are processed by a series of reads to this register, each read transferring the data that follows the previous read. PIO in data transfers are processed by a series of writes to this register, each write transferring the data that follows the previous write. The results of a read during a PIO in or a write during a PIO out are indeterminate. Note: This same text appears in ATA/ATAPI-7 volume 1 clause 5.4.3. It is probably also in ATA/ATAPI-5 and ATA/ATAPI-6. If this text is correct then my guess is there are no ATA/ATAPI hosts or devices that can claim to be compliant with the ATA/ATAPI standards. Hale *** Hale Landis *** www.ata-atapi.com ***
