INT 61 u - PC/TCP kernel v2.05 - "nm_res_name" - RESOLVE HOST NAME
        AH = 54h
        CX = size of destination buffer
        DS:DX -> 127-byte buffer containing host name???
        ES:DI -> destination buffer or 0000h:0000h
Return: CF clear if successful
            DX:AX -> ???
        CF set on error
            AX = error code (see INT 61"PC/TCP")
BUG:    the SLIP kernel for v2.05 bounds-checks the wrong register, so values
          greater than 54h in AH may crash the system.  Other kernels may have
          this bug as well.
SeeAlso: INT 61/AH=00h"PC/TCP"