X_LOADER_START = $0700;
X_BANK = $073D;
X_SRC = $07B9;
X_CLRSTART = $0725;
X_CLREND = $0730;
X_PORTB = $0707;
X_EXITBANK = $07A6;
X_NMIEN = $07AF;
X_BOOT_START = $BFD6;