Post by thread:[PIC]: INHX8M format question

Hi, I read from MPASM Assembler Help that all addresses are doubled in INHX8M. Why is this necessary? Thanks for any comments, James -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads

> From: James Ventura [spam_OUTjaventuraTakeThisOuTDIGITELONE.COM] > > Hi, > > I read from MPASM Assembler Help that all addresses are > doubled in INHX8M. Why > is this necessary? > > Thanks for any comments, > James INHX8M address bytes, mid-range PICs have 14 bit instructions, so it takes two bytes in a hex file per each PIC instruction. -Mike -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads

James Ventura wrote: > > Hi, > > I read from MPASM Assembler Help that all addresses are doubled in INHX8M. Why > is this necessary? > > Thanks for any comments, > James It's counting 16 bytes per line, not 8 words. -- Best regards Tony mICros http://www.bubblesoftonline.com .....salesKILLspam@spam@bubblesoftonline.com -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads

On Thu, 21 Feb 2002 18:57:22 -0600, James Ventura <javenturaKILLspamDIGITELONE.COM> wrote: >Hi, > >I read from MPASM Assembler Help that all addresses are doubled in INHX8M. Why >is this necessary? > The INHX8M format, by definition, treats everything as bytes. The 14-bit value of each PIC instruction has to be expressed as two bytes in the hex file. The first PIC instruction (PIC address 0) occupies byte addresses 0 and 1, the second (PIC address 1) occupies byte addresses 2 and 3, etc. This doubles the 'apparent' address of each instruction in the hex file. Yes, it's confusing, but it has to be done this way when you use a byte-oriented file format with wider-than-byte data. Regards, Bob -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads

Hi Michael, So how do I get the 'real' address? Regards, James ----- Original Message ----- From: "Dipperstein, Michael" <.....mdippersKILLspam.....HARRIS.COM> To: <EraseMEPICLISTspam_OUTTakeThisOuTMITVMA.MIT.EDU> Sent: Thursday, February 21, 2002 19:13 Subject: Re: [PIC]: INHX8M format question {Quote hidden}> > From: James Ventura [javenturaspam_OUTDIGITELONE.COM] > > > > Hi, > > > > I read from MPASM Assembler Help that all addresses are > > doubled in INHX8M. Why > > is this necessary? > > > > Thanks for any comments, > > James > > INHX8M address bytes, mid-range PICs have 14 bit instructions, so it takes two > bytes in a hex file per each PIC instruction. > > -Mike > > -- > http://www.piclist.com hint: PICList Posts must start with ONE topic: > [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads > > -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads

James Ventura wrote: > > Hi Michael, > > So how do I get the 'real' address? Take the two-byte (word) address and divide by 2, it's that simple! Regards, Tim Hamel > > Regards, > James > {Original Message removed}