Re: HB bootstrap problem when U6 installed  I assume you've tried other HC138's, and that it's not a case of a
faulty chip?

fred

In your message you said:
> One of my students is having a problem in assembling their HB:
> 
> Downloading and executing IC works fine _until_ U6 is installed.  After
> installing U6 ('138) the GRN LED doesn't quite go off when putting the
> board in bootstrap mode, it glows faintly.  And we can't download the
> bootstrap.
> 
> If U6 is removed, everything is fine, the GRN LED goes off when put in
> bootstrap mode, all downloading is fine.
> 
> We did have to change 6811s to get this far (original one didn't work), but
> it seems solid now, but only if U6 not installed.
> 
> Any suggestions?
> 
> 	--greg
> 
> *****************************************************************
> * Greg Starr, Professor                                         *
> * Department of Mechanical Engineering        ph (505) 277-6298 *
> * University of New Mexico, Albuquerque NM 87131   FAX 277-1571 *
> * email- starr@unm.edu  WWW- http://www.me.unm.edu/~starr/      *
> *****************************************************************
> 
> 
> 

