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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
C
Chip
D
Chip
D
Chip
D
Chip
D
Chip
D
Chip
D
Chip
D
Chip
D
Chip
Bank 0 even bytes 16, 18, 20, 22, 24, 26, 28, 30
Bank 0 even bytes 0, 2, 4, 6, 8, 10, 12, 14
Bank 1 even bytes 16, 18, 20, 22, 24, 26, 28, 30
Bank 1 even bytes 0, 2, 4, 6, 8, 10, 12, 14
Bank 2 even bytes 16, 18, 20, 22, 24, 26, 28, 30
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, 30
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 Slots
DIMM Contains
PK1488-98