[pro] write-char vs. 8-bit bytes

I'm using sbcl to write-char a 16-bit unsigned integer to a socket as two separate unsigned 8-bit bytes, for example 141 should appear as #x00 #x8d. SBCL appears to convert the #x8d into a two-byte utf-8 char, resulting in 3 bytes written to the stream \#x00 #xcd #x8d. What is the proper incantation to achieve this? (SBCL on Windows, if that matters). thanks pt