Bill Garber wrote:
Seems to me from looking at quite a few, from //c thru platinum //e, that code is included in the rom. Prom should not be necessary in that case. However there is one questionable IC on that card. I had a bit of trouble reading it even using the larger version with brightness and contrast enhanced. Do you know what chip that is? It's at location U17.
There shouldn't be any such code in the ROM. The floppy drive interface was designed after the Apple II was built. If the II didn't need it then they wouldn't have added it to the II+ or IIe. The part at U17 is a MPQ2906. Wayne