Compaq AlphaServer DS20 Service Manual download pdf (Page 24)

1-14 AlphaServer DS20 Service Manual

1.7

Memory Addressing and Data Location

Memory addressing is contiguous beginning with memory bank 0. The first

address of each bank is one above the ending address of the previous bank.

Data is located in DIMMs as described by Figure 1-7.

Figure 1-7 Contents of DIMMs

Chip

Bank 0 even bytes 16, 18, 20, 22, 24, 26, 28, 3

Bank 0 even bytes 0, 2, 4, 6, 8, 10, 12, 14

Bank 1 even bytes 16, 18, 20, 22, 24, 26, 28, 3

Bank 1 even bytes 0, 2, 4, 6, 8, 10, 12, 14

Bank 2 even bytes 16, 18, 20, 22, 24, 26, 28, 3

Bank 2 even bytes 0, 2, 4, 6, 8, 10, 12, 14

Bank 3 even bytes 0, 2, 4, 6, 8, 10, 12, 14

Bank 3 even bytes 16, 18, 20, 22, 24, 26, 28, 3

Bank 0 odd bytes 1, 3, 5, 7, 9, 11, 13, 15

Bank 0 odd bytes 17, 19, 21, 23, 25, 27, 29, 31

Bank 1 odd bytes 1, 3, 5, 7, 9, 11, 13, 15

Bank 1 odd bytes 17, 19, 21, 23, 25, 27, 29, 31

Bank 2 odd bytes 17, 19, 21, 23, 25, 27, 29, 31

Bank 2 odd bytes 1, 3, 5, 7, 9, 11, 13, 15

Bank 3 odd bytes 1, 3, 5, 7, 9, 11, 13, 15

Bank 3 odd bytes 17, 19, 21, 23, 25, 27, 29, 31

DIMM Slots

DIMM Contains

PK1488-98

1 2 ... 19 20 21 22 23 24 25 26 27 28 29 ... 181 182

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Compaq AlphaServer DS20 Service Manual Page 24