\xcd\x03\x800\x01v\xd5\x07\x870\x01\xf0\x1f\x1f
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 NC,$+3 ;0003 30 01 0 . HALT ;0005 76 V PUSH DE ;0006 D5 . RLCA ;0007 07 . ADD A,A ;0008 87 . JR NC,$+3 ;0009 30 01 0 . RET P ;000B F0 . RRA ;000C 1F . RRA ;000D 1F .