On Sat, Apr 27, 2013 at 4:16 AM, Bob Devries <devries.bob at gmail.com> wrote: > > the 64/128K jumpers referred to the BASIC ROM/EPROM.; 64 for an 8K ROM > (usually Color Basic 1.3) and 128K for a 27128 type which included Extended > Color Basic in the upper half of the ROM. > Don't you mean lower, since ECB stays at $8000 and CB at $A000? Juan