> Van: : S.Ramasubramanian <sr.ramasubramanian@UBG.TVSE.CO.IN>
> Aan: PICLIST@MITVMA.MIT.EDU
> Onderwerp: Hex to ASM
> Datum: maandag 24 januari 2000 13:15

Hello rams,

  Nope, you're not right.  The code that will result from a
code-to-assembly conversion will be right, no matter what
assembler/compiler was used to create the code.  The only problem that
can/will arise is that it's not allways clear what certain pieces of code
do.  They could be written to conserve memory, code and/or time.  Therefore
a simple binary-to-decimal routine could look different for every compiler
or (human) programmer.

As to calculating a Checksun for code-protected devices:  It was possible
with the 16C84, because you could read the garbeled contents.  The 16F84
however only reads Zero's on a protected device.  So, that would not work.
I gather that more PIC's have the same (reading Zero's) problem

Regards,
  Rudy Wieser


> Hello Piclisters,
> Whether conversion of HEX to ASM possible for code protected device?
> One more doubt !  whether the asm file after disassembling will depend on
> the compiler used for generating the hex.  I think , if we have used a
> particular version of MPLAB for generating the HEX, and if we use the
same
> for disassembling, we will not have the problem with the asm file.  But
> older version of compiled hex code, if disassembled with latest MPLAB as
> one of our friend told to import to program memory, will not give us the
> correct form of ASM.  AM I right?  If any one has suggestion in this
regard
> pls send it across
>
>       One more ?  Is it possible to calculate checksum of code protected
> device.  This I require to check the programmed IC.  Any app notes for
> calculating the checksum of any programmed device with PIC
>
> Thanks
>
> rams