Hitachi HDT725025VLA380 Specifications - Page 194
Read Multiple C4h
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12.19 Read Multiple (C4h) Table 108: Read Multiple (C4h) Command Block Output Registers Register 7 6 5 4 3 2 1 0 Data Feature Sector Count V V V V V V V V Sector Number V V V V V V V V Cylinder Low V V V V V V V V Cylinder High V V V V V V V V Device/Head 1 L 1 D H H H H Command 1 1 0 0 0 1 0 0 76 CRC UNC 0V Error Register 54 3 2 1 0 0 IDN 0 ABT T0N AMN 0V 0 V 0 0 Command Block Input Registers Register 7 6 5 4 3 2 1 0 Data Error see below Sector Count V V V V V V V V Sector Number V V V V V V V V Cylinder Low V V V V V V V V Cylinder High V V V V V V V V Device/Head - - - - H H H H Status see below Status Register 7 654 3 2 1 0 BSY RDY DF DSC DRQ COR IDX ERR 0 V0V - 0 - V The Read Multiple command reads one or more sectors of data from disk media and then transfers the data from the device to the host. The sectors are transferred through the Data Register 16 bits at a time. The command execution is identical to the Read Sectors command with one exception: an interrupt is generated for each block-as defined by the Set Multiple command-instead of for each sector. Deskstar T7K500 Hard Disk Drive Specification 180