home *** CD-ROM | disk | FTP | other *** search
- Path: sparky!uunet!ogicse!reed!reeder
- From: reeder@reed.edu (P. Douglas Reeder)
- Newsgroups: comp.robotics
- Subject: Re: Miniboard or Motorola eval board?
- Message-ID: <1992Nov6.114542.2744@reed.edu>
- Date: 6 Nov 92 11:45:42 GMT
- Article-I.D.: reed.1992Nov6.114542.2744
- References: <1992Nov3.135508.2766@news.media.mit.edu> <1992Nov4.133417.8689@reed.edu> <Bx9JGp.464@jabba.ess.harris.com>
- Organization: Div, Grad & Curl
- Lines: 34
-
- In article <Bx9JGp.464@jabba.ess.harris.com> dwilliam@jabba.ess.harris.com (Dave Williams) writes:
- :
- : The EVBU (EVBU stands for EValuation Board, University style, by the
- :way) is a much less complex board.
- :Mot. supplies a program for PCs called PCBug11 that operates via the
- :bootstrap mode of the 6811. What happens, is you power everything up,
- :and PCBug11 loads a "talker" program into the 6811. This program is
- :used to modify the 6811's internal registers and memory under control
- :of the PC.
- I am pleased to hear that this arrangement is available. This sounds like
- it implements a way of doing things that I had envisioned, which doesn't
- hog the board's resources.
-
- :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.
-
-
-
-
- --
- Doug Reeder Internet: reeder@reed.EDU
- Div, Grad & Curl USENET: ...!tektronix!reed!reeder
- programming & derivative work BITNET: reeder@reed.BITNET
- I am actively seeking scientific programming contracts.
-