dear all,
i know, that this in not realy the right place for my question,
but i don't know an better one.
i work on an embedded system with the lynx 3dm+ SM722 without any
bios or video bios. the reference for my work on the SMI chip is
primarly the xfree86 driver source, because the help from the
vendor silicon motion is absolutly low. may be, because we are a small
company and have only small volume for the the chip.
from our distributor, hyline in germany, we get an old programmer's
refenrence
manual for the SM910, 1966 version 1. very old, but for some ideas very
helpful.
and now, to my questions. we have problems with the access to the intern
memory.
we don't use an extern memory, the chip, 3dm4+ have 4MB intern.
in our later design we use the SM710. but i have an developer board to
test
and look. so i can verify the registers in the chip past the bios
initialising.
the xfree driver start on an initialised chip from the bios. so there
are no
info about the init sequence. you use only the GPR71 register for info
from the
bios about the memory size. but perhaps some members of the developer
group
have more info's or better references than i.
our references:
lynx 3dm+ datasheet rev. 4
lynx 3dm+ schematic 'PURIN PLUS' rev. 1
lynx family bios spec 2.2
and some older info's from the SMI-page, but now this is closed.
and, of course, SM910 programmer's refenrence
so can you inform, wher i can get this information to initialise the
chip.
and what are the best place to discuss about the internals from
SM72x-chips.
with many thanks for you, willi
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