What Character Encoding Is it?

Question

Hi I have some DBF files, containing old school records (grades, names etc.). I wanted to migrate them into new database, but can't find the right charset. I ran all JAVA supported charsets, but none of them returned right characters for bytes I identified.
It's Latvian text. I'm used to UTF8, windows-1257, but haven't seen anything like this. It should be like this:
0xC6 for ā
0xF0 for Ē
0xF1 for ē
0xD2 for č
0xF5 for ļ
0xFD for š
0x61 for a
0x31 for 1
What character encoding it is?

Answer 1

I think I've found the right encoding. It was a standard in Latvia till 1992, but still was used till 2010 for bank reports by law. Many DOS programs was using it in Latvia.
It's RST 1040-90
http://dl.tilde.lv/download/TildesBirojs/HTML.Help/index.html?pielikums_b.htm