WD_SOURCE_ID
write_wd33c93(regs, WD_SOURCE_ID, SRCID_ER);
write_wd33c93(regs, WD_SOURCE_ID, SRCID_ER);
write_wd33c93(regs, WD_SOURCE_ID, SRCID_ER);
id = read_wd33c93(regs, WD_SOURCE_ID);
write_wd33c93(regs, WD_SOURCE_ID, scsi_pointer->phase ? SRCID_ER : 0);