\xcd\x03\x80\xe6\x01\xee1\xffv
Note that non-ascii characters in the above source code will be escaped (such as \x9f).
Disassemble:
ORG 00000H CALL 08003H ;0000 CD 03 80 . . . AND 001H ;0003 E6 01 . . XOR 031H ;0005 EE 31 . 1 RST 38H ;0007 FF . HALT ;0008 76 V