From: paul swed paulswedb@...
Just downloaded the information. The schematic really is shaping up very
nicely.
On the dumps any suggestion for looking at them?
You have to use an 8051 disassembler to look at the FLASH dump: I have
been using IDA
I have no idea on a free disassembler. But there has to be one. Will look
later tonight.
Regards
Paul.
On Thu, Nov 8, 2012 at 8:44 AM, Elio C elio...@gmail.com wrote:
From: paul swed paulswedb@...
Just downloaded the information. The schematic really is shaping up very
nicely.
On the
I have found this:
http://home.earthlink.net/~davesullins/software/dis51.html
not tested, but it seems good
On Thu, Nov 8, 2012 at 3:12 PM, paul swed paulsw...@gmail.com wrote:
I have no idea on a free disassembler. But there has to be one. Will look
later tonight.
Regards
Paul.
On Thu,
http://lmgtfy.com/?q=8051+disassembler
paul swed wrote:
I have no idea on a free disassembler. But there has to be one. Will look
later tonight.
Regards
Paul.
On Thu, Nov 8, 2012 at 8:44 AM, Elio C elio...@gmail.com wrote:
From: paul swed paulswedb@...
Just downloaded the information. The
http://lmgtfy.com/?q=8051+disassembler
http://lmgtfy.com/?q=8051+disassembler
Dear Chuck, I appreciate your ironic comment, but I was really serious
regarding the suggestions for a 8051 disassembler for several reasons:
- I think I'm already able to use Google
- I have very few time to spare
Elio,
The problem with diassemblers is they only do what
the author needed. And, different people have
different needs, and different ideas of what is best.
I find that I use different disassemblers at different
times. Some handle one problem very well, others handle
others better. For a
On Thu, Nov 8, 2012 at 7:32 AM, Chuck Harris cfhar...@erols.com wrote:
If
I need something different from what one of the open
source projects can supply, I put on my coding hat
and do it my way.
That is the major advantage of Open Source. If the program does not have
some feature
Disassemblers are hardly rocket science. They are only a parser with a pile
of memory to remember labels. Why not write your own? I've written them in
the past (a long way in the past, and I've written cross-assemblers too), so
I don't see anything difficult about writing one for the 8051.
In message 69463259C455458FAE691C4D0DC8FF75@EEPC, Murray Greenman writes:
Disassemblers are hardly rocket science. They are only a parser with a pile
of memory to remember labels. Why not write your own?
I wrote a framework for such reverse engineering, where the disassembler
just has
Murray not rocket science for some is to others and actually I would just
like to know how the RB actually works. So I am staying clear of another
endless project. Because I am not that smart. ;-)
Regards
Paul
WB8TSL
On Thu, Nov 8, 2012 at 11:56 AM, Murray Greenman denw...@orcon.net.nzwrote:
Just to be clear, I thanks all of you for the warm suggestions on writing
an 8051 disassembler by myself, but it is not exactly what I was asking
for...
I asked for some _suggestions_ on a reasonable good disassembler.
Even if I have the expertise to write my own disassembler, I just do not
want
In message
CA+FhqXcodUuLvDMiHTs8Fe-grLPqYf3Q=m8k2hmxpqnc1+p...@mail.gmail.com, Elio C
writes:
Just to be clear, I thanks all of you for the warm suggestions on writing
an 8051 disassembler by myself, but it is not exactly what I was asking
for...
I asked for some _suggestions_ on a
Poul
Tried looking this up and have pretty odd results. A link please
On Thu, Nov 8, 2012 at 1:13 PM, Poul-Henning Kamp p...@phk.freebsd.dkwrote:
In message CA+FhqXcodUuLvDMiHTs8Fe-grLPqYf3Q=
m8k2hmxpqnc1+p...@mail.gmail.com, Elio C writes:
Just to be clear, I thanks all of you for
Hi
A disassembler is only going to give you a steaming pile of assembly code.
Assuming the origin of the code was a high(er) level language, you will have a
major task ahead to turn it into anything rational. Writing a 8051 disassembler
is likely a much easier project.
Bob
On Nov 8, 2012,
In message
cad2jfahjxbmuvqvydvah90l9ntlpkoeapdytz5fbaa75ceg...@mail.gmail.com, paul swed
writes:
Poul
Tried looking this up and have pretty odd results. A link please
https://github.com/bsdphk/PyRevEng
--
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
p...@freebsd.org
I've done lots of disassembly and strongly prefer an interactive disassembler.
The reason is that code frequently combines tables and instructions and if you
just try to straight disassemble you will get large sections of nonsense which
even extend beyond the data due to multiple byte
In message 509c3858.6050...@verizon.net, Peter Gottlieb writes:
The reason is that code frequently combines tables and instructions [...]
What I do in PyRevEng is try to automate this and many other steps.
The disassembler gets pointed at an address were we know there is an
I'm sorry for the long delay (due to personal reasons) but at last I was
able to dump the contents of the PSD chips which contains the firmware of
the FEI FE-5680A rubidium frequency standard!
I have also updated the schematics with some more details/information.
You will find the new schematics
Elio
Just downloaded the information. The schematic really is shaping up very
nicely.
On the dumps any suggestion for looking at them?
Thanks for your hard work.
Regards
Paul
WB8TSL
On Wed, Nov 7, 2012 at 7:24 PM, Elio C elio...@gmail.com wrote:
I'm sorry for the long delay (due to personal
From: Mike McCauley
I've been considering ripping the firmware from the mcu as well. I've
not
got beyond the consideration stages, but i have all the equipment here
at
work. When you say that the read option is not available. is this
because
the chip has protection fuses enabled?
Id like to
In my opinion you don't need the power of an IDA-class disassembler to
process an 8051-like code. The MCS51 family processors have only 128 or 256
bytes of RAM (and at most 64K ROM) and cannot host complex code.
On Fri, Feb 17, 2012 at 10:27 AM, Elio Corbolante elio...@gmail.com wrote:
From:
Don forget the PSD813 :) It provides 128KB Flash and 8KB RAM... so it
can be a bit more complicated
Regards,
Javier
El 17/02/2012 11:09, Azelio Boriani escribió:
In my opinion you don't need the power of an IDA-class disassembler to
process an 8051-like code. The MCS51 family processors have
OK, then maybe there are ROM bank switching as the MCS51 can't execute
beyon the 64K limit. It can be very challenging to follow a code that jumps
between 64K ROM banks. Moreover the MCS51 has to address the external RAM
by massive pointer use (the famous MOVX @DPTR,A and MOVX A,@DPTR
-nuts-boun...@febo.com] On
Behalf Of Azelio Boriani
Sent: Friday, February 17, 2012 6:06 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] FE-5680A firmware dump
OK, then maybe there are ROM bank switching as the MCS51 can't execute
beyon the 64K limit. It can be very
...@febo.com] On
Behalf Of Azelio Boriani
Sent: Friday, February 17, 2012 6:06 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] FE-5680A firmware dump
OK, then maybe there are ROM bank switching as the MCS51 can't execute
beyon the 64K limit. It can be very
of precise time and frequency measurement
Subject: Re: [time-nuts] FE-5680A firmware dump
Maybe. Take into account that MCS51 OTP processors usually are 8K of code.
I use, among the others, the AT89C55 that has 20K of flash ROM. It seems
better to use a ROMless 8051 and place the code/tables in the PSD
El 07/02/2012 0:30, Elio Corbolante wrote:
From: Steve .iteration69 at gmail.com
I've been considering ripping the firmware from the mcu as well. I've not
got beyond the consideration stages, but i have all the equipment here at
work. When you say that the read option is not available. is
From: Chris Albertson albertson.ch...@gmail.com
Email some of the sellers in China and offer to buy a returned unit.
they must have some
On Mon, Feb 13, 2012 at 5:55 PM, EB4APL eb4...@cembreros.jazztel.es
wrote:
I don't mind sending something like $5 to a buy group and we'll have
enough
Elio,
Let us contribute to the buy. If you can receive money by Paypal it
wold be very easy.
Best regards,
Ignacio, EB4APL
El 14/02/2012 13:26, Elio Corbolante escribió:
From: Chris Albertsonalbertson.ch...@gmail.com
Email some of the sellers in China and offer to buy a returned unit.
I don't mind sending something like $5 to a buy group and we'll have
enough with a few of us. But if I were Elio I'll not feel very happy
using a working unit for this kind of use, I would try to not break
anything and he is even talking of removing the programmable chips to
read them in a
Email some of the sellers in China and offer to buy a returned unit.
they must have some
On Mon, Feb 13, 2012 at 5:55 PM, EB4APL eb4...@cembreros.jazztel.es wrote:
I don't mind sending something like $5 to a buy group and we'll have
enough with a few of us. But if I were Elio I'll not feel
Hi,
Has anybody tried to ask the guy who made the forensics in Youtube if he
could send the remnants to Elio? He could make a very good use of them.
Regards,
Ignacio, EB4APL
El 07/02/2012 0:30, Elio Corbolante wrote:
From: Steve .iteratio...@gmail.com
I've been considering ripping the
Better idea. Let's all donate a few bucks each and buy Elio an intact one.
Peter
On 2/12/2012 8:08 PM, EB4APL wrote:
Hi,
Has anybody tried to ask the guy who made the forensics in Youtube if he could
send the remnants to Elio? He could make a very good use of them.
Regards,
Ignacio,
Unfortunately my programmer is only able to erase/program/verify the PSD
chip. The read option is not available! :-(
To dump the firmware I need to desolder the chip and prepare a dedicated
testbed: before doing this on a working FE-5680A, is there anyone of you
who want to sell me a *nonworking*
I've been considering ripping the firmware from the mcu as well. I've not
got beyond the consideration stages, but i have all the equipment here at
work. When you say that the read option is not available. is this because
the chip has protection fuses enabled?
Also, what programmer do you have,
From: Steve . iteratio...@gmail.com
I've been considering ripping the firmware from the mcu as well. I've not
got beyond the consideration stages, but i have all the equipment here at
work. When you say that the read option is not available. is this because
the chip has protection fuses
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