When a READ/WRITE reaches the end of the cylinder (EOT on side 1 in a multi-track operation, or EOT in a single-track one), the FDC emulation moves the drive to the next cylinder:
- fdctrl_seek_to_next_sect() advances cur_drv->track and, since commit c5139bd9 ("fdc: fix FD_SR0_SEEK for non-DMA transfers and multi sectors transfers"), sets FD_SR0_SEEK in ST0.