Hi Joe, Thanks for responding. What version? That's a good question. The only information that I have is a reference to the tools in my old MCS-8 User's Manual. I've never had, seen, nor used the original software, so I don't know what version. The MCS-8 manual is dated November 1974. It also describes a MCS-8 Cross Assembler Software Package (MAC 8) and MCS-8 Simulator Software Package (INTERP 8). There is also a reference to MCS-8 User's Program Library with items like: Binary Search Subroutine Floating Point Arithmetic Package 8-bit multiply 8-bit divide etc.. On the back/inside cover of the manual it states under "Ordering Information": PL/M Compiler Software Package (written in Fortran IV) MCS-8 Cross Assembler and Simulator Software Package (written in Fortran IV) The manual states that both are "available via time sharing service or directly from Intel". I have source for PL/M version 2.0 (January 1975) which is 8080 specific (The source and documents contain no references to "8008". So what I'm looking for I guess predates that. Unless this version produces code (or could be modified to produce code) that is 8008 compatible. I haven't yet looked into that idea. If what you have in 8" floppies could be transferred to a DOS diskette or even emailed to me or placed on some ftp sire I could check it out and see if its what I'm looking for. Let me know what you need to do that: $$ or trade or whatever. Thanks!