2008/7/23 Mark Waterbury <[EMAIL PROTECTED]>: > Does anyone recall how to determine the one byte value that results from a > column on an 80-byte card that was "overpunched" with the 0-8-2 holes punched > out? Please tell me, in hex, e.g. X'82' (for example only). Thanks.
Do you mean an algorithm? Or just the value for 0-8-2 specifically (which is X'E0', from the green or yellow card)? I'm not sure there is an overall algorithm, though obviously there are certain patterns to be seen. But 80-column cards long precede EBCDIC, and indeed 8-bit codes in general, so the mapping between the 12-bit card code and 8-bit EBCDIC is largely arbitrary, outside the basic printable characters. Tony H. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
