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  /external/qemu-pc-bios/bochs/bios/
notes 16 dl (bit 0) --> bit 4 # drive number
21 Drive response:
24 * drive sets the busy bit in Status Reg to 1
26 > drive sets the aborted-command bit in the Error register and
28 > Drive also sets the busy bit in the Status register to 0.
29 > Drive then generates an interrupt to the system.
31 > drive executes an implied seek to desired track and
34 transferred, the drive sets the data-request bit to 1, sets
37 the data, the drive sets the data-request bit and the busy bit to 0.
39 the first sector of data, the drive sets the data-request bit to 0
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rombios.c 117 // - cdrom drive is hardcoded to ide 0 device 1 in several places. see "FIXME ElTorito Hardcoded"
6305 Bit8u drive, num_sectors, sector, head, status, mod; local
7150 Bit8u drive, num_sectors, track, sector, head, status; local
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