I have a TS-NVRAM2 board connected to my TS-7250 and
can not see any more that 1MB of the 2MB board.
I have tried access the TS-NVRAM2 in linear and page
mode an I am unable to see more than 1 MB either way.
The PC-104 bus on the TS-7250 has 21 address bits
which providesaccess to 1MB of the 2MB TS-NVRAM2 board,
when accessingthe NVRAM2 board via the base address of
0x21800000.
The TS-NVRAM2 documentation says that placing the
board in linear mode will give a TS-ARM access to all
2MB for space, how is this possible without using page
mode if there are only 21 bits of address space?
Also, the TS-NVRAM2 documentation says the base address
of the RAM is at 0x2A800000 when placed in linear mode.
I did not find that doing a mmap to the base address
of 0x2A800000 worked correctly, 0x21800000 worked.
In page mode, I am able to read/write to the first 32 pages
of the board, but not the second 32 pages. The documetation
says there are 64 pages of 32KB each in page mode.
Anyone else try using a NVRAM2 board?
Thank you,
Craig
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