Supermicro X6DAi-G User Manual page 60

X6DAT-G/X6DAi-G User's Manual
Transfer Mode
This feature allows the user to select transfer mode. The options are
Standard, Fast PIO1, Fast PIO2, Fast PIO3, Fast PIO4, FPIO3/DMA1 and
FPIO4/DMA2.
Ultra DMA (Direct Memory Access) Mode
This feature allows the user to select Ultra DMA Modes. DMA Modes
allow peripheral devices (such as sound cards, floppy disks) transfer
data directly to and from memory without going through the CPU. With
double transition clocking, UDMA (Ultra DMA) allows data to be
transferred on both the rising and the falling edges of the clock, doubling
data throughput for any given clock speed. The options are Disabled,
Mode 0, Mode 1, Mode 2, Mode 3, Mode 4, and Mode 5. Please refer to
the table below for detailed information.
Ultra DMA Mode
Mode 0
Mode 1
Mode 2
Mode 3
Mode 4
Mode 5
System Memory
This display informs you how much system memory is recognized as being
present in the system.
Extended Memory
This display informs you how much extended memory is recognized as
being present in the system.
Cycle Time
(Nanoseconds)
240
160
120
90
60
40
4-6