Does anyone know of _any_ information about this series of cards? They are quad cards which seem to use two chips of the same types as the M9301 uses four, with 128 words of memory. They thus must fit between the M792 diode ROM card, and the M9301, in timing terms. However, search as I can, I don't seem to be able to find anything on them. Known variants are the -YA, -YB and -YJ. Noel