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Bitfields for AMD-640 DRAM Configuration Register 1

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Bit Description

7 - 5

 type of address mapping for memory banks 0 and 1
---EDO/FastPageMode---
000 - eight-bit column address
001 - nine-bit column address
010 - ten-bit column address
011 - eleven-bit column address
100 - twelve-bit column address
101 - reserved
110 - reserved
111 - reserved
---SDRAM---
0xx - 16-Mbit SDRAM (see #00991)
1xx - 64-Mbit SDRAM

4

 reserved (0)

3 - 1

 type of address mapping ofr memory banks 2 and 3

0

 reserved (0)

See Also:

#00983,#00990