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Bitfields for AMD-645 IDE FIFO Configuration register

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Bit Description

7

reserved (0)

6 - 5

FIFO configuration
00 = primary channel = 16, secondary channel = 0
01 = primary channel = 8, secondary channel = 8
10 = primary channel = 8, secondary channel = 8
11 = primary channel = 0, secondary channel = 16

4

reserved (1)

3 - 2

primary channel FIFO threshold:
00 = completely full
01 = 3/4 full
10 = 1/2 full
11 = 1/4 full

1 - 0

secondary channel FIFO threshold:
00 = completely full
01 = 3/4 full
10 = 1/2 full
11 = 1/4 full

See Also:

#01034,#01036