top 3 address lines (A10--A12). Assuming you burn the
code into the
lowest 1K locations of the EPROM ,then simply connect those 'extra'
address lines to ground. That will mean only the bottom 1K of the EPROM
is ever accessed which is what you want.
I would be tempted to use a dip switch, then you could dump a bunch of code
and bank switch it.