I'm trying to upgrade my 26-3134A to 64k and extended basic, I installed my 4464's and changed the jumpers J2 thru J5 from 64k to 128K for the rom size, and closed jumper J6 for 64k. Now I need to find a copy of the roms. It has color basic 1.3 on a 64k (24pin) rom. And I'm trying to use 28 Pin eproms. Thanks. Later, dabone