Samsung 3.5" hard disk drives Benutzerhandbuch
DISK DRIVE OPERATION
SpinPoint V40 Product Manual
88
6.6.4.1
Normal DMA transfer
Initialize DMA
Command DMA data transfer
Reset DMA
Status
BSY=0
BSY=1
BSY=x
DRQ=x
DRQ=x
BSY=1
nIEN=0
nIEN=0
BSY=0
6.6.4.2
Aborted DMA transfer
Initialize DMA
Command
DMA data
Reset DMA
Status
BSY=0
BSY=1
BSY=x
DRQ=1
DRQ=1
BSY=1
nIEN=0
nIEN=0
BSY=0
6.6.4.3
Aborted DMA Command
Initialize DMA
Command
Reset DMA
Status
BSY=0
BSY=1
BSY=1
BSY=0
nIEN=0