Mark, I don't understand the question. You have already shown the resulting disassembled code for that C. Are you asking about how to get the disassembled code for the C library routine? Ah! Read through the thing again, and it seems you are indeed looking for the disassembly of the library routines. Well, I guess you want a disassembler for that. Check if there aren't any in the DECUS library perhaps? By the way. There is no guarantee that DECC$STRCPY is written in C. But a disassembly will only give you VAX assembler anyway. Johnny On 2011-03-13 21:58, Mark Wickens wrote: Guys, Purely out of interest, how would I diassemble a DEC C routine on VAX/VMS? Can I use DEBUG to do this? For example, I have the following code: #include <stdio.h> #include <string.h> void main(int argc, char **argv) { char to[32]; strcpy(to, "Hello World!\n"); printf(to); } If I use BUBBLE$ cc/list/machine_code strcpy.c I get the following: 1 1267 strcpy(to, "Hello World!\n"); D6 AF 9F 0027 pushab $CODE D8 AD 9F 002A pushab -40(fp) 00000000* EF 02 FB 002D calls #2,DECC$STRCPY Note that the call to DECC$STRCPY is listed, but not the code in the routine. I'm interested in how some of the C library routines are implemented at a machine code level from an academic point of view. Regards, Mark. -- Johnny Billquist || "I'm on a bus || on a psychedelic trip email: bqt at softjar.se || Reading murder books pdp is alive! || tryin' to stay hip" - B. Idol