[gta02-core] IO Schematics

[Dave Ball]

Luke Duncan wrote:
> I checked in an initial shot at the IO schematics and updated ecn016 
> with the changes that were made to the accelerometers.

Great - Thanks Luke!

The first thing I noticed is that we've managed to duplicate two of the 
CPU parts - U1501D and U1501G have been placed in the schematics twice, 
once on the LCM sheet and once on the IO sheet  As far as I know, we 
can't do this, and need to include each only once, with labels to 
indicate sheet-to-sheet nets.  I think I'd leave U1501G on the LCM 
sheet, and leave U1501D on the IO sheet.

Cheers,
Dave