Post by thread:HEX to ASM

part 0 989 bytes content-type:text/x-vcard; charset=us-ascii; name="vcard.vcf" (decoded 7bit) Pailoor Glen wrote: {Quote hidden}> hi ! & thanks for your help. > > i have a 12c508 otp with a small amount of code in it. > i cant remember what the code is . > i have read the code out & its in hex > i want to convert it to asm so i can read it ! > is there any way i can do it. > i have been using mplab. > > thanks for your assistance , i appreciate it > glen Content-Type: text/x-vcard; charset=us-ascii; name="vcard.vcf" Content-Description: Card for Ravi Pailoor Content-Disposition: attachment; filename="vcard.vcf" Content-Transfer-Encoding: 7bit Attachment converted: wonderland:vcard.vcf (TEXT/CSOm) (0002F694) Content-Type: text/x-vcard; charset=us-ascii; name="vcard.vcf" Content-Description: Card for Ravi Pailoor Content-Disposition: attachment; filename="vcard.vcf" Content-Transfer-Encoding: 7bit Attachment converted: wonderland:vcard.vcf 1 (TEXT/CSOm) (0002F695)

It certainly is possible though I don't know of any software out there. The program is called a decomplier and I have written a few. Just like integrating there are mystery constants though; documentation is lost. Things like loop and jump and subroutine call labels will have to be fudged and given an alias as a function of what you, they informed programmer, think they are. > Does anyone know of a program that will convert HEX back over to the > Microchip assembly instruction set? Is this possible? > > > David

At 07:15 PM 1/23/00 -0800, you wrote: >Does anyone know of a program that will convert HEX back over to the >Microchip assembly instruction set? Is this possible? > > >David Yes, why not? There must be some disassemblers in the market. But I am trying to develop one for Win32. I am doing it only for the mid-range PICs. I took help from the info on the HEX format available with the help of MPASM that comes with MPLAB 4.12 - Appendix A. Microchip also has more documentation on Intel HEX format. I forgot the URL. But I have the document with me. I can send it to you, if you want. Regards, Somasundaram Meiyappan

Look at Nigel Goodwin's site. http://www.lpilsley.demon.co.uk/ You will find his very good program for Tait like programmer which has a built in disassembler. A standalone disassembler is also available there. Regard. Gaston Somasundaram Meiyappan a icrit : {Quote hidden}> > At 07:15 PM 1/23/00 -0800, you wrote: > >Does anyone know of a program that will convert HEX back over to the > >Microchip assembly instruction set? Is this possible? > > > > > >David > > Yes, why not? There must be some disassemblers in the market. But I am > trying to develop one for Win32. I am doing it only for the mid-range PICs. > I took help from the info on the HEX format available with the help of > MPASM that comes with MPLAB 4.12 - Appendix A. Microchip also has more > documentation on Intel HEX format. I forgot the URL. But I have the > document with me. I can send it to you, if you want. > > Regards, > Somasundaram Meiyappan

Thanks all for the help. I think the Nigel disassembler will get me where I want to go. After a disassemble of a hex file in the disassembler, in fact, all is not there.....better than nothing :) Thanks a bunch!! David ----- Original Message ----- From: David Covick <spam_OUTdacTakeThisOuTWEST.NET> To: <.....PICLISTKILLspam@spam@MITVMA.MIT.EDU> Sent: Sunday, January 23, 2000 7:15 PM Subject: HEX to ASM > Does anyone know of a program that will convert HEX back over to the > Microchip assembly instruction set? Is this possible? > > > David >

You need to be careful with some disassemblers. If you have some data tables in the middle of the code, the disassembler *can* gets lost track, since it will the hexa code for the data "Hello World" (for example) would be instruction code bytes... so you can imagine the mess at the disassembler output. If you are the original software writer, you can easily figure it out, but if you are disassembling code from somebody else, it can take some time to you realize that "nonsense" code is in real a data list or table. Wagner David Covick wrote: {Quote hidden}> > Thanks all for the help. > I think the Nigel disassembler will get me where I want to go. > After a disassemble of a hex file in the disassembler, in fact, all is not > there.....better than nothing :) > > Thanks a bunch!! > > David > > ----- Original Message ----- > From: David Covick <dacKILLspamWEST.NET> > To: <.....PICLISTKILLspam.....MITVMA.MIT.EDU> > Sent: Sunday, January 23, 2000 7:15 PM > Subject: HEX to ASM > > > Does anyone know of a program that will convert HEX back over to the > > Microchip assembly instruction set? Is this possible? > > > > > > David > >

In a message dated 1/23/00 9:16:49 PM Central Standard Time, EraseMEdacspam_OUTTakeThisOuTWEST.NET writes: << Does anyone know of a program that will convert HEX back over to the Microchip assembly instruction set? Is this possible? >> I thought you could do this with MPLAB? just use the import function then select display code in the display window. Paul

Wagner Lipnharski wrote: > You need to be careful with some disassemblers. > If you have some data tables in the middle of the code, the > disassembler *can* gets lost track, since it will the hexa code for > the data "Hello World" (for example) would be instruction code > bytes... so you can imagine the mess at the disassembler output. Quite true. The assembler "dynamite" for the 680x series (ran under Flex09 on the target system) allowed definition files of zones, being code (default), text data, byte data, word data and label data; and labels. It marked all labels formally referenced by the code with a "Lxxxx" label unless one was found already in the label file. The only thing it didn't have was an interactive mode with a zone/ label editor. Anyone seen an assembler with those functions? Of course, for "low" and "midrange" PICs, there is no real zone problem, as all data *correctly* decodes as MOVLWs. Automatically building a symbol table from GOTO and CALL references would be good though, and a good disassembler adds printable ASCII correspondences to MOVLW data as comments. -- Cheers, Paul B.

At 11:51 PM 1/23/00 EST, you wrote: >In a message dated 1/23/00 9:16:49 PM Central Standard Time, dacspam_OUTWEST.NET >writes: > ><< Does anyone know of a program that will convert HEX back over to the > Microchip assembly instruction set? Is this possible? >> > >I thought you could do this with MPLAB? just use the import function then >select display code in the display window. > >Paul Yes, that is correct. You can do it with MPLAB. That is all I used to see what the picstart plus firmware was doing. Mind you, MPLAB does only the most basic, basic job, it is not intelligent in anyway. Regards, Jim Robertson NEWFOUND ELECTRONICS ________________________________________ Email: @spam@newfoundKILLspampipeline.com.au http://www.new-elect.com MPLAB compatible PIC programmers. ________________________________________

> At 07:15 PM 1/23/00 -0800, you wrote: > >Does anyone know of a program that will convert HEX back over to the > >Microchip assembly instruction set? Is this possible? > >David MPLAB, Options/development mode/select processor. File/Import/Download to memory. Window/Program Memory. Click on the top left of the program memory window to select between display formats. Making a dissassembler program is far easier than making an assembler program, you can break the hex file into opcodes with reference to the hex file format, then use "select case" statement in basic to break each short word into opcode and parameter if present. PIC16CXX have only a small instruction set and most of the opcodes are taken up by different parameters i.e. retlw 0, retlw 1, retlw 3,---retlw d'255' and goto 0, goto 1, goto 3 etc. I've done a 68HC11 IDE and keeping track of constants, variables, data types, hex,decimal, binary, multiple origins, addressing modes etc was far more complex than what a PIC dissasembler would be. regards, Graham Daniel.

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

part 0 1389 bytes content-type:text/x-vcard; charset=us-ascii; (decoded 7bit) if you have the last vertion of MPLAB you can convert code for after vertions. Francisco ": S.Ramasubramanian" wrote: {Quote hidden}> > 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 Content-Type: text/x-vcard; charset=us-ascii; name="briones.vcf" Content-Transfer-Encoding: 7bit Content-Description: Card for Francisco Armenta Content-Disposition: attachment; filename="briones.vcf" Attachment converted: wonderland:briones.vcf 5 (TEXT/CSOm) (00015BE4)

> Van: : S.Ramasubramanian <KILLspamsr.ramasubramanianKILLspamUBG.TVSE.CO.IN> > Aan: RemoveMEPICLISTTakeThisOuTMITVMA.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

Thanks Tony........I will give it a try !! ----- Original Message ----- From: Tony Nixon <TakeThisOuTTony.NixonEraseMEspam_OUTENG.MONASH.EDU.AU> To: <RemoveMEPICLISTTakeThisOuTMITVMA.MIT.EDU> Sent: Thursday, January 27, 2000 1:59 PM Subject: Re: HEX to ASM {Quote hidden}> David Covick wrote: > > > > Does anyone know of a program that will convert HEX back over to the > > Microchip assembly instruction set? Is this possible? > > > > David > > See > > http://www.picnpoke.com/demo/heximg.html > > > -- > Best regards > > Tony > > http://www.picnpoke.com > salesEraseME.....picnpoke.com >