I'm writing a driver for Hector Disc2 machine (with independante Z80 processor unit) an I cant arrive to format disk. I saw in floppy.c : if (image->exists()) { /* if (drv->interface_.format_sector) drv->interface_.format_sector(img, side, sector_index,c, h, r, n, filler);*/ } why is these line are removed in "floppy_drive_format_sector" proc ? It's very strange because all disk can't format in this case !