Re: A92: Recovering from Crashes on the 92+
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Re: A92: Recovering from Crashes on the 92+
>> >The 92 processor is a 68000 processor. It has thus an adressable space
of 16
>> >Mb ...
>>
>> Yes, provided that all the adress lines are connected... I believe the
92 was
>> only intended to have 256Kb or RAM from the beginning, and therefore only
>> 18 of
>> the 24 (?) lines are wired.
>>
>> >I don' t know if this is what you meant but i think that the external
flash
>> >module is simply built in the adressable space.. I may be wrong as i
have no
>> >92+ module..
>>
>> Why if the 92 could adress all the memory on the Plus would TI implement
>> such a
>> strange solution like the "Archive memory"? It serves no useful purpose
since
>> it's erased along with the rest of the memory, and "archiving" a variable
>> is no
>> better than to lock it.
>You're right, 18 wires would be enough, but aren't RAM and ROM addressed
in the
>same way? On the plus I am able to read memory from $0 to $6xxxxx in one
>thread (check with my disassembler/monitor that I posted yesterday,August
27th).
>Maybe I'm wrong, I don't know enough about hardware aspects like that, but I
>think if only 18 lines were connected they had to implement a bank switching
>system or a multiplexer which would have slowed down the system... the 92+
is
>faster than the 92. So my suggestion: the internal RAM is connected via 18
>lines(or so), the module has a wider range, a suppose all 24 lines are
>connected. A.K.
>
Is there anyone who has looked into the 92 curcuit board? I know there are
complete plans for the 85 out there somewhere, but what about the 92?
Niklas Brunlid - http://www.efd.lth.se/~e96nbr
PQF Quote follows:
"In a word -- im-possible!"
"That's two words," said Dibbler.
-- (Terry Pratchett, Moving Pictures)
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