Nope, it wasn't breaking news, and if the PDF I was sent had been easily found on the MAXIM site, I'd certainly have pasted in a link to it rather than simply referring to it. HOWEVER, it seems relevant to the bootloader issue, and since it's apparent that only the silicon after the B4 '420's and A5 '430/449/450's.

The name of the App's engineer was included so people go go directly to the source if they wanted, rather than relying on second-hand info, which is easily misconstrued.

I personally have been interested in this matter only as an aside, as the things I've done with this series has been limited to external program memory.

However, it seems that people have had FLASH and FLASH-programming-related problems and this matter hadn't yet come up in the course of this thread. I don't know how many of the current users of the DS89C4x0 family with earlier revisions than the ones above are in the hands of the folks who've participated in this discussion, (I'd ask for a show of hands, but ...) but I suspect at least some of them are. The '420's I've been using are from 2001 or possibly earlier(back when the datasheet said 50 MIPS). Those are probably subject to this flaw, but since I've used them as fast 8032's, it matters not.

RE