; MBOX V1.4 26-JUL-1994 Neill Clift (neill@macro.demon.co.uk)   J I have worked on a number of real time systems under VMS and I have alwaysL meant to write a peek into mailbox's program. About a year ago I finally gotJ round to it. The program knows about mailbox message formats for V5.4 thruK V6.1. It will need changing if/when DEC ever change it in a future release.   2 To run the program define it as a foreign command:   mbox :== $fullfilespec:mbox.exe    *NOTE*  K If you do make any changes, find any bugs or even just have some good ideas I about the program *PLEASE* let me know about them. If you think there are 3 synchronization problems with the code let me know.   	 Problems:   O It does not see the first few mailbox's in the system as these are not returned  by sys$device_scan.   K Deassigning a channel to a mailbox seems to cause all processes in RWMBX to L become computable. So in order to see processes in RWMBX the program does anM arbitrary wait after deassigning mailbox channels to full mailboxes. This may  be subject to timing windows  L I don't like the output format that much but I just don't have the brains to come up with anything better.   E It all seems to work on the AXP but I am very much less sure that its M synchronized correctly (I don't have the VMS source CD for the AXP so I can't L check). /RWMBX does not work as R5 no longer contains the UCB address duringL these waits. There is probably another way of obtaining the info but I don't know what it is yet.  	 Have fun. )                                    Neill. 