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Bitfields for Intel 82443BX Paging Policy Register

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Bit Description

15 - 8

banks per row (bit 7 is row 0, bit 15 is row 7)
0 = two banks
1 = four banks

7 - 5

reserved

4

Intel Reserved

3 - 0

DRAM Idle Timer ("DIT") number of clocks in idle state before all pages are precharged
0000 :

no clocks

0001 : 2 clocks
0010 : 4 clocks
0011 : 8 clocks
0100 : 10 clocks
0101 : 12 clocks
0110 : 16 clocks
0111 : 32 clocks
1000 : never (pages are not closed on idle)
1001 : never (pages are not closed on idle)
1010 : never (pages are not closed on idle)
1011 : never (pages are not closed on idle)
1100 : never (pages are not closed on idle)
1101 : never (pages are not closed on idle)
1110 : never (pages are not closed on idle)
1111 : never (pages are not closed on idle)

See Also:

#01142