REVDRIVE
user_reset_fdc(REVDRIVE(fdc, 0), FD_RESET_ALWAYS, false);
if (user_reset_fdc(REVDRIVE(i, 0), FD_RESET_ALWAYS, false)) {
user_reset_fdc(REVDRIVE(i, 0), FD_RESET_ALWAYS, false);
drive = REVDRIVE(fdc, unit);
drive = REVDRIVE(fdc, unit);