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This motherboard supports
Ultra DMA/33
and DMA modes. The IDE bus is 16-bit, which means every transfer is two bytes.
Clock per
Mode
33MHz PCI
PIO mode 0
30ns
PIO mode 1
30ns
PIO mode 2
30ns
PIO mode 3
30ns
PIO mode 4
30ns
DMA mode 0
30ns
DMA mode 1
30ns
DMA mode 2
30ns
UDMA/33
30ns
3
0
0
3
0
0
mode. Following table lists the transfer rate of IDE PIO
Clock
Cycle Time
Count
20
600ns
(1/600ns) x 2byte = 3.3MB/s
13
383ns
(1/383ns) x 2byte = 5.2MB/s
8
240ns
(1/240ns) x 2byte = 8.3MB/s
6
180ns
(1/180ns) x 2byte = 11.1MB/s
4
120ns
(1/120ns) x 2byte = 16.6MB/s
16
480ns
(1/480ns) x 2byte = 4.16MB/s
5
150ns
(1/150ns) x 2byte = 13.3MB/s
4
120ns
(1/120ns) x 2byte = 16.6MB/s
4
120ns
(1/120ns) x 2byte x2 = 33MB/s
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