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Bitfields for Intel chipset ISA I/O recovery timer register

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Bit Description

7

(82425EX/82371) DMA reserved page register aliasing disable
0 = ports 0090h-009Fh alias ports 0080h-008Fh
1 = ports 0090h-009Fh forwarded to ISA bus

6

8-bit I/O recovery enable

5 - 3

8-bit I/O recovery time
000 = 8 SYSCLKs
001 = 1 SYSCLKs
010 = 2 SYSCLKs
011 = 3 SYSCLKs
100 = 4 SYSCLKs
101 = 5 SYSCLKs
110 = 6 SYSCLKs
111 = 7 SYSCLKs

2

16-bit I/O recovery enable

1 - 0

16-bit I/O recovery time
00 = 4 SYSCLKs
01 = 1 SYSCLKs
10 = 2 SYSCLKs
11 = 3 SYSCLKs

See Also:

#01064,#01083,#01084,#01167,#01170