AHD_SENSE_BUFSIZE
/*len*/AHD_SENSE_BUFSIZE, op);
ahd_outw(ahd, HCNT, AHD_SENSE_BUFSIZE);
offset = PAGE_SIZE - (AHD_SENSE_BUFSIZE * scb_data->sense_left);
scb_data->sense_left = PAGE_SIZE / AHD_SENSE_BUFSIZE;
sense_data += AHD_SENSE_BUFSIZE;
sense_busaddr += AHD_SENSE_BUFSIZE;