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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