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- Newsgroups: comp.robotics
- Path: sparky!uunet!caen!sol.ctr.columbia.edu!jabba.ess.harris.com!dwilliam
- From: dwilliam@jabba.ess.harris.com (Dave Williams)
- Subject: Re: Miniboard or Motorola eval board?
- Message-ID: <BxB4rI.7w@jabba.ess.harris.com>
- Organization: Harris Corporation - ISD
- References: <1992Nov3.135508.2766@news.media.mit.edu> <1992Nov4.133417.8689@reed.edu> <Bx9JGp.464@jabba.ess.harris.com> <1992Nov6.114542.2744@reed.edu>
- Date: Fri, 6 Nov 1992 18:30:53 GMT
- Lines: 34
-
- In <1992Nov6.114542.2744@reed.edu> reeder@reed.edu (P. Douglas Reeder) writes:
-
- >In article <Bx9JGp.464@jabba.ess.harris.com> dwilliam@jabba.ess.harris.com (Dave Williams) writes:
- >:In article<???> reeder@reed.edu (Doug Reeder) writes:
- >:>Functionally, the HC11 is always in single-chip operating mode, so
- >:>hardware not part of the EVB cannot be in the memory map. This means
- >:>you are forever limited to the two 8K blocks of RAM (though you could
- >:>replace the 8K ROM with one of your own).
- >:
- >: Hummm. I wouldn't say that - There's quite a few holes in the
- >:EVB memory map where you could put all sorts of nifty stuff.
-
- >How? There are no connectors to the address and data busses on the board.
- >The B and C ports ara available at connector P1, but only as general I/O
- >ports, since connector P1 looks like an HC11 in single-chip mode.
-
- Uhhhh, errrr, ummm. "Whoops." (Maybe my .sig is appropriate
- here, huh?)
-
- Sorry about that. I've been switching back and forth between the
- EVBU and the EVB so much that I've gotten them confused. The EVBU
- has a very similar P1 connector, which *can* be used to add in more
- memory-mapped hardware. Most of the stuff I've added to the EVB
- board has been driven off of I/O signals from the various single-
- chip ports. Oh well.
-
- Not to mention the fact that I keep hacking on the buffalo ROM
- to add in my own custom routines. I keep thinking it's something
- *I* added in. :-)
-
- --
- Dave Williams | I'm lucky if I can
- dwilliam@jabba.ess.harris.com | even spell opinion,
- "Huh? What? Could you repeat the question?" | much less have them.
-