How to deal with the additional address line?

which version of quartus and Nios are you using ?

what are your settings of user logic in sopc builder (mainly databus width ?)?

with dynamic bus sizing:

8 Bit Databus : connect A0..Ax of RAM to A0..Ax of NIOS ADDRESS BUSS

16 Bit Databus : connect A0..Ax of RAM to A1..A(x+1) of NIOS ADDRESS BUSS

32 Bit Databus : connect A0..Ax of RAM to A2..A(x+2) of NIOS ADDRESS BUSS

in case of 16 Bit Databus leave A0 of NIOS ADRESS BUS unconnected

in case of 32 Bit Databus leave A0+A1 of NIOS ADRESS BUS unconnected

REMARK:

Altera told me that there was a change in the addressing scheme with NIOS 1.1 for

native slaves.

Table 15 Page 100 of Avalon Bus Specification should be corrected as

following:

Alignment | Master Width | Slave Width | A[0] of Slave is connected to Byte Address Bit Number

native | 32 | 32 | A2(NIOS1.0) A2(NIOS1.1)

native | 32 | 16 | A2(NIOS1.0) A1(NIOS1.1)

native | 32 | 8 | A2(NIOS1.0) A0(NIOS1.1)

dynamic | 32 | 32 | A2

dynamic | 32 | 16 | A1

dynamic | 32 | 8 | A0

PLEASE correct me if i tell something wrong!