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SD/MMC/SDIO Registers: Difference between revisions

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===4004802h/4004A02h - SD_CARD_PORT_SELECT===
===4004802h/4004A02h - SD_CARD_PORT_SELECT===
   15-11 Unknown/unused (appears to be always zero)
   15-11 Unknown/unused (appears to be always zero)
   10    Unknown (write: should be 1, read: usually/always 0)           (W?)
   10    Unknown (should be set on writing) (reads as zero)             (W)
   9     Unknown (write: should be 0, read: usually 1 for SD)            (R?)
   9-8  Unknown (Always 2 for SD/4004802h, always 1 for SDIO/4004A02h) (R)
  8    Unknown (write: should be 0, read: usually 1 for SDIO)         (R?)
   7-4  Unknown/unused (appears to be always zero)
   7-4  Unknown/unused (appears to be always zero)
   3-1  Unknown                                                        (R/W)
   3-1  Unknown                                                        (R/W)
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