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→DSi SD/MMC I/O Ports: Command/Param/Response/Data
DATA32 mode requires setting both 40048D8h.bit1 and 4004900h.bit1. For DATA16 mode, both bits should be zero (though DATA16 seems to be also working the same way when only either of the bits is zero).
DATA32 mode requires setting both 40048D8h.bit1 and 4004900h.bit1. For DATA16 mode, both bits should be zero (though DATA16 seems to be also working the same way when only either of the bits is zero).
===400480Ah/4004A0Ah - SD_DATA16_BLK_COUNT - "Transfer Block Count" (R/W)<br>
===400480Ah/4004A0Ah - SD_DATA16_BLK_COUNT - "Transfer Block Count" (R/W)===
4004908h/4004B08h - SD_DATA32_BLK_COUNT (R/W)===
===4004908h/4004B08h - SD_DATA32_BLK_COUNT (R/W)===
15-0 Number of Data Blocks for multiple read/write commands (0..FFFFh)
15-0 Number of Data Blocks for multiple read/write commands (0..FFFFh)
In Data32 mode, DATA32_BLK_COUNT is decremented after each block (except after the last block, where it stays at 0001h instead of getting zero). In Data16 mode, SD_DATA16_BLK_COUNT doesn't decrease (instead, there must be some hidden internal counter register).<br>
In Data32 mode, DATA32_BLK_COUNT is decremented after each block (except after the last block, where it stays at 0001h instead of getting zero). In Data16 mode, SD_DATA16_BLK_COUNT doesn't decrease (instead, there must be some hidden internal counter register).<br>