MMU implementation.

"This isn't a class project and I have no
contact with the person who has posted
thread 7445."

You must admit, it's a big coincidence though, isn't it?

"I would like to know whether MMU concept
can be inplemented on 8 bit controllers."

Of course it's possible - see the answer in the other thread.

But is it sensible?

Why not just load the entire code into SRAM and run from there, using "conventional" code banking?
Or load into IAP Flash and, again, use "conventional" code banking?

(whatever you do, all will need some sort of "trick" to write to CODE space).

"This isn't a class project and I have no
contact with the person who has posted
thread 7445."

You must admit, it's a big coincidence though, isn't it?

"I would like to know whether MMU concept
can be inplemented on 8 bit controllers."

Of course it's possible - see the answer in the other thread.

But is it sensible?

Why not just load the entire code into SRAM and run from there, using "conventional" code banking?
Or load into IAP Flash and, again, use "conventional" code banking?

(whatever you do, all will need some sort of "trick" to write to CODE space).

http://www.keil.com/forum/docs/thread7340.asp

http://www.keil.com/forum/docs/thread7413.asp

Hi Neil,
Yeah 7445 was a real coincidence. It
surprised me too.
My project specification says " I have
to get only 32KB code out of 116kB code
into the 8032's PM".
So, i can't use code banking here.
I need to use a mechanism like paging to
see that the code comes into the PM(SRAM) of
8032 in 32kB chunks only.
Is it ok to implement mmu mechanism on
an application like MP3 as I have read some
articles on the net stating it holds good
for only 32/64 bit controllers ?
If yes, can u please suggest some links which
could help me implement the same.
What is IAP Flash ?

Regards,
Chetan

Ok Neil, I got what IAP Falsh is. Sorry

"Is it ok to implement mmu mechanism on an application like MP3"

What exacly do you mean by, "an application like MP3"?
Do you actually have the 8051 running the MP3 decoding algorithms?
I'd have thought that was quite a challenge for an 8051 running directly from Flash without any code banking - let alone the paged scheme you're proposing!! :-0

Hi Neil,
Iam using a SOC with an inbuilt
8032 and DSP. Currently, it is running
an MP3 application and definitely code
banking is done.
My client wants me to design the application such that only 32kB code is executed at a time.
He wants to replace the 8032's
128kB SRAM with a 32KB SRAM in his future
design. So, that's the task.