Sun Blade 1000 (A28)
Sun Fire 280R (A35)
Netra 20 (N28)

Options 7050 / 7051 / 7052 / 7053

501-4489	501-5030	501-5031	501-5401
128MB 3.3V ECC 7ns SDRAM DIMM Option 7050	512MB 3.3V ECC 7ns SDRAM DIMM Option 7051	1G 3.3V ECC 7ns SDRAM DIMM Option 7052	256MB 3.3V ECC 7ns SDRAM DIMM Option 7053

Memory Map

J0407	Group 1	Bank 1/3	fa000000 - 1f3ffffff
J0406	Group 0	Bank 0/2	00000000 - f9ffffff
J0305	Group 1	Bank 1/3	fa000000 - 1f3ffffff
J0304	Group 0	Bank 0/2	00000000 - f9ffffff
J0203	Group 1	Bank 1/3	fa000000 - 1f3ffffff
J0202	Group 0	Bank 0/2	00000000 - f9ffffff
J0101	Group 1	Bank 1/3	fa000000 - 1f3ffffff
J0100	Group 0	Bank 0/2	00000000 - f9ffffff

Notes

1. The minimum requirement is four DIMMs in any group.
2. DIMMs can be installed in any group order.
3. Each group addresses 4GB of memory.
4. Memory slots (Jxxxx) map to same-numbered DIMMs (Uxxxx):
   

   Slot	DIMM
   J0407	U0407
   J0406	U0406
   J0305	U0305
   J0304	U0304
   J0203	U0203
   J0202	U0202
   J0101	U0101
   J0100	U0100

Reference

Sun Blade 1000 Service Manual, 805-4496.