IBM PC CONVERTIBLE Technical Reference page 249

004D 83 FF 02 CMP DI,2 FEATURE ICON?
OD50 75 03 JNE EM45 NO THEN DONT COLUMN CORRECT
OD52 80 EA 04 SUB DL,4 MOVE BACK 4 COLUMNS
OD55 EM45:
OD55 B3 07 MOV BL,07H SET NORMAL ATTRI Bun
OD57 B8 1300 MOV AX,01300H WRITE STRING FOR INT 10
OD5A
CD 10 INT 10H DS I PLAY ERROR MESSAGE
OD5C EMSG_RET:
OD5C 07 POP ES RESTORE SEGMENT REGS
OD5D IF POP DS
OD5E C3 RET RETURN TO CALLER
OD5F E_MSG ENDP
2-224 ROM BIOS