\xcd\x03\x800\x01v\xd5\xfe (\x03\xb8\xc8\xd8G
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,$+3 ;0003 30 01 0 . HALT ;0005 76 V PUSH DE ;0006 D5 . CP 00AH ;0007 FE 0A . . JR Z,$+5 ;0009 28 03 ( . CP B ;000B B8 . RET Z ;000C C8 . RET C ;000D D8 . LD B,A ;000E 47 G