Ok, made it around the original issue (user error). Thanks for the feedback/tips. Have made it past finding the fixed data and determing the length of the variable data string. Can't seem to figure out how to move the closing data character. Example: Found the constant string - USERID=( Found the variable data - USER01 (could be 1-8 characters long) So the output has USERID=(USER01 Trying to move a closing paren to that output location. I know the offset into the output record, but struggling with the MVC displacement. The displacement is in a register. Using MVC R10(L'CPAREN,R6),CPAREN fails because the R10 is equated to 10, meaning it starts in CC 11 (actual value in R10 is x'17').
Is there a different move that would do this? What I did find curious is a register specified as the length in an MVC instruction works. That is, it looks at the value in the register, not the equated value. From: Rich Long <xmann...@yahoo.com> To: ASSEMBLER-LIST@LISTSERV.UGA.EDU Sent: Wednesday, November 20, 2013 5:54 PM Subject: Moves and others Issue I am facing - reading fixed length records, then searching for a fixed length character string. Once I find that string, there is a need to check the next 8 bytes to see how much data follows. It could be 1-8 characters in length. Finding the fixed piece is easy enough. When checking the variable part, I check for a blank. If non-blank, I need to save that byte into an 8 character field for use later. Having an issue saving off the one character at a time. Trying to use an index register to keep track of the 8 byte field, so I know where to put the next byte, if necessary. It doesnt't like the move - MVC 0(1,R5),0(R9). R5 is supposed to be tracking the 8 byte field location, and R9 is the input record. LA R5,WORKAREA was used to point at the 8 byte field. I will then need to do another move of this variable length field to an output record. It's sort of along the same line, moving the variable length field (1-8 characters) in the middle of some other fields. So will need to keep track of the locations. Any pointers would be most appreciated.
