Ultra 80 (A27)
Enterprise 420R (A33) / Netra t 1400/1405

Options 7043 / 7005

501-5691
64MB 5V ECC 60ns DIMM Option 7043

501-4743	501-5936	501-6005	501-6056
256MB 5V ECC 60ns DIMM w Gate Array Logic or Programmable Array Logic Option 7005	256MB 5V ECC 60ns DIMM w Gate Array Logic No Option E420R only	256MB 5V ECC 60ns DIMM w Gate Array Logic Option 7005	256MB 5V ECC 60ns DIMM w Gate Array Logic Option 7005

Memory Map

RISER BOARD	SYSTEM BOARD	BANK	ADDRESS
U0301 U0302	U1301 U1302	0 0	0000 0000 - 3fff ffff 0000 0000 - 3fff ffff
U0401 U0402	U1401 U1402	1 1	4000 0000 - 7fff ffff 4000 0000 - 7fff ffff
U0303 U0304	U1303 U1304	2 2	8000 0000 - bfff ffff 8000 0000 - bfff ffff
U0403 U0404	U1403 U1404	3 3	c000 0000 - ffff ffff c000 0000 - ffff ffff

Notes

1. DIMMs are required on both the Riser Board and the System Board.
2. Every populated bank must contain four same-size DIMMs, all with the same part number. Four same-size DIMMs are a quad.
3. To activate 2-way interleaving, quads must be installed in banks 0 and 1, which are non-adjacent banks.
   (A third quad may be installed in either remaining bank, but that will disable interleaving.)
4. To activate 4-way interleaving, all four banks must be populated with quads.
5. Each bank addresses 1GB of memory.
6. 64MB DIMM 501-2480 and 128MB DIMM 501-3136 are not supported.
7. 16MB and 32MB DIMMs are not sold for the Ultra 80 System Board.
8. The 501-5936 shipped in the Enterprise 420R. It is not supported in the Ultra 80.

Reference

Ultra 80 Service Manual, 805-6618.