Hello,
> I have a TS-NVRAM2 board connected to my TS-7250 and
> can not see any more that 1MB of the 2MB board.
Did you order the 2MB board? The simplest way to tell
is to check if you have four SRAM chips, if so then you
have a 2MB board. If you have only two SRAM chips then
you have a 1MB 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.
When in linear mode ensure you are in 16 bit mode(JP3 and
JP4 off).
> 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?
There are actually 22 address lines, which will provide up
to 4MB 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.
Sorry about that, it looks like there is a typo in the
manual. I will ensure this gets updated to the proper
address.
//Eddie
Yahoo! Groups Links
<*> To visit your group on the web, go to:
http://groups.yahoo.com/group/ts-7000/
<*> To unsubscribe from this group, send an email to:
<*> Your use of Yahoo! Groups is subject to:
http://docs.yahoo.com/info/terms/
|