>>774
ちょっとテスト
Libiconv DLL 1.10-20051016 for Windows
C:\tmp>echo "1b24422141" | xxd -r -p | iconv -f iso-2022-jp -t ucs-2 | xxd -p => 301c
C:\tmp>echo "1b24422141" | xxd -r -p | iconv -f iso-2022-jp -t cp932 | xxd -p => iconv: (stdin):1:0: cannot convert
C:\tmp>echo "1b24422141" | xxd -r -p | iconv -f iso-2022-jp-3 -t ucs-2 | xxd -p => 301c
C:\tmp>echo "1b24422141" | xxd -r -p | iconv -f iso-2022-jp-3 -t cp932 | xxd -p => iconv: (stdin):1:0: cannot convert
C:\tmp>echo "8160" | xxd -r -p | iconv -f cp932 -t ucs-2 | xxd -p => ff5e
C:\tmp>echo "8160" | xxd -r -p | iconv -f cp932 -t iso-2022-jp | xxd -p => iconv: (stdin):1:0: cannot convert
C:\tmp>echo "8160" | xxd -r -p | iconv -f cp932 -t iso-2022-jp-3 | xxd -p => 1b24285122321b2842
C:\tmp>echo "301c" | xxd -r -p | iconv -f ucs-2 -t cp932 | xxd -p => iconv: (stdin):1:0: cannot convert
C:\tmp>echo "301c" | xxd -r -p | iconv -f ucs-2 -t iso-2022-jp | xxd -p => 1b244221411b2842
C:\tmp>echo "301c" | xxd -r -p | iconv -f ucs-2 -t iso-2022-jp-3 | xxd -p => 1b244221411b2842
C:\tmp>echo "ff5e" | xxd -r -p | iconv -f ucs-2 -t cp932 | xxd -p => 8160
C:\tmp>echo "ff5e" | xxd -r -p | iconv -f ucs-2 -t iso-2022-jp | xxd -p => iconv: (stdin):1:0: cannot convert
C:\tmp>echo "ff5e" | xxd -r -p | iconv -f ucs-2 -t iso-2022-jp-3 | xxd -p => 1b24285122321b2842

…うーん。

個人的にはここの
http://www2d.biglobe.ne.jp/~msyk/software/libiconv-1.10-ja-patch.html
パッチを使って*-ms系の文字コードを使うのが無難じゃないかと思ったり思わなかったり。