\xcd\x03\x80\xd8\xfe18\x03\xd6k/\xff\xc7v
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 . . . RET C ;0003 D8 . CP 031H ;0004 FE 31 . 1 JR C,$+5 ;0006 38 03 8 . SUB 06BH ;0008 D6 6B . K CPL ;000A 2F / RST 38H ;000B FF . RST 0 ;000C C7 . HALT ;000D 76 V