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lock+8051
Build this programmer here:
**broken link removed**
Load the hex file (attached) in the 89S51/52, 89C51/52 or whatever you have.
Use a terminal program to view the menu.
I found that the delay is anywhere in the 13 - 18 range. If it does not work, the delay is not right or the chip...
how unlock 8051
I found the source code and instructions. Here it is.
Remember this does not work on newer 8051.
I think it will work on older 87c51 or equivalent.
Re: unlock 89C2051
I realize this. What i did was just an experiment to see if a glitch would skip over a ljmp intruction. It worked. This proves my theory that the micro can be glitched!
This device does not have serial programming mode, it is only parallel.
My theory is that you can...
Hello Guys,
I was curious to know if anyone successfully unlocked an 89C2051 (20 Pin device)
in order to read out the code.
I know it is possible, I have seen it done in the past, but I could never accomplish this myself.
I wrote a program for the AT89C2051 to dump the contents to the serial...
breaking 8051 lock bits
Hello Guys,
Here is a VERY OLD and OUTDATED pdf file including code on how some really old locked 8051's were read. Now this will never work in a million years on a newer 8051 but I thought it was interesting reading, enough to post it here.
I did however SEE with my...
sch files
echo47 this seems to be the easiest way for me
can you show me how? remember all i want to do is convert to gif.
where do i download this program? I checked and all they have is the newest one which is very expensive!
thankyou to everyone for your responses.
orcad draft
I have a few old designs for fpga that are in orcad .sch format.
I used to use draft.exe to view these files long ago. None of this software is windows friendly. Any suggestions on how I may view these files, or maybe even print them out in wondows?
any advice for me?
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