From: easton@andrews.edu (Jeff Easton)
Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!sharkey!aucis!easton
Newsgroups: comp.sys.m68k
Subject: Re: 68HC11 and Buffalo Monitor
Message-ID: <275681303490@andrews.edu>
Date: Sat Feb  3 13:58:28 EST 1990
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In article <10696@zodiac.ADS.COM>, jdevries@zodiac.ADS.COM (Jeff De Vries) writes:
> [I realize this isn't the right newsgroup for this, but it seemed
>  the closest... ]

comp.sys.m6809 is closer ;^)

> I'd like to cobble together a small system using the 68HC11 micro-
> controller chip.  I've downloaded the source for the BUFFALO monitor
> from the Motorola BBS and noticed the starting address is the same
> as the internal ROM address on the 68HC11.  My question is: Does 
> Motorola have available 68HC11's with the BUFFALO monitor already
> masked into the ROM?  If not, can I override the internal ROM with
> an external ROM containing the monitor?


  From the M68HC11 Reference Manual, page 3-5, last paragraph, 

  "The erased state of the CONFIG [register] is $0F on an MC68HC11A8.
The MC68HC11A1 is the same die as the MC68HC11A8 but comes from the
factory with $0D in CONFIG to disable the internal 8K-byte masked
ROM."

  Your local Motorola Rep should be able to get you this book, P/N
M68HC11RM/AD.

> 
> Thanks!
> 
> Jeff De Vries                        Advanced Decision Systems


	Jeff Easton			Zenith Data Systems
	Systems Engineer		OEM Engineering
	easton@andrews.edu    -- or --
	..uunet!zds-asg!zds-oem!easton	Save the Otters!
	I'd rather be Water Skiing....