Thanks for the elaborate explaination, Banjo. Tony also chipped in, and has promised to perhaps release a version that would handle the 'A' chips. Hope that happens soon! Till then, I have a query for Randy. I agree the Melabs loader looks great too, although I do not have it. From what I had read and understood, the actual bootloader code to be programmed in the chip is to be generated by using the online utility on the Melabs site; the bootloader software to be purchased is just the PC component. Is this right? Anand ----- Original Message ----- From: "Banjo Spam" To: Sent: Tuesday, March 25, 2003 11:04 PM Subject: Re: [PIC]: Bootloader for 18F876A > Anand, > > There may be an issue because of the 'A' version. > My direct experience is only with the '877A. > I know that for the 'A' version, a program can modify > program memory on 4-word boundaries only. That is, a > program must write all 4 words within the 4-word > block. I *believe* the code to write to program memory > on both the 'A' version and non-'A' version is the > same, with the above restriction. On writing the first > three words to program memory, '877A writes the values > to an internal buffer. Then on writing the fourth > word, all values are written to program memory. > > Note that this does not apply to programming > externally. I know that you cannot program a '877A on > a specific (now forgotten) MPLAB 5.x using PICSTART > Plus and choosing '877. I suspect that the method to > externally program these two parts is different. > > You may want to review the actual ROMZAP code that > writes to memory to verify it conforms to the 4-word > boundary and writes to all 4-words at a time. > > Good luck. > > --- Anand Dhuru wrote: > > Would there be an issue because of the 'A' version? > > Why would something like > > Tony Nixon's ROMZAP, which does let you bit bang the > > TX/RX and can be > > configured for all 16F87Xs not work? > > > > Anand Dhuru > > > > ----- Original Message ----- > > From: "Orbit Communications" > > To: > > Sent: Tuesday, March 25, 2003 06:40 PM > > Subject: [PIC]: Bootloader for 18F876A > > > > > > Hi, > > > > Anyone know of a bootloader that uses bit-bashed IO > > suitable for the A > > version of PIC16F876 ? > > > > TIA > > > > -- > > http://www.piclist.com hint: The PICList is archived > > three different > > ways. See http://www.piclist.com/#archives for > > details. > > > > -- > > http://www.piclist.com hint: The PICList is archived > > three different > > ways. See http://www.piclist.com/#archives for > details. > > > __________________________________________________ > Do you Yahoo!? > Yahoo! Platinum - Watch CBS' NCAA March Madness, live on your desktop! > http://platinum.yahoo.com > > -- > http://www.piclist.com hint: The PICList is archived three different > ways. See http://www.piclist.com/#archives for details. > -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.