Thanks for the info.
Now... A Woz IIgs as I remember is modified ROM 0. Modified how, I do not know.
All Woz IIgs were originally ROM 0, then Apple provided a free ROM and video graphics chip upgrade to ROM 1 less than a year later to run newer software written later than late 1987. Tools in ROM were also buggy, fixed in the ROM 1 upgrade. Very few ROM 0 IIgs machines are left as they weren't totally usable with later software, so they're a rare find if just for historical sake.