\xcd\x03\x808\x09\xcd\x00\x80\xcd\x00\x80\xc3\x00\x00v
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 . . . JR C,$+11 ;0003 38 09 8 . CALL 08000H ;0005 CD 00 80 . . . CALL 08000H ;0008 CD 00 80 . . . JP 00000H ;000B C3 00 00 . . . HALT ;000E 76 V