PROHST is a preliminary version of a utility to process the profile file produced by the PROFIL utility of MSDOS. Those of you familiar with MS-Pascal or MS-Fortran will have little difficulty in understanding how the parameters work. There are three, the .PRF filename, an optional histogram file (default extension .HST, default name same as the .PRF file) and an optional link map. If the link map was produced with the line number options PROHST will try and relate buckets to line numbers. Otherwise, it will relate it to module offsets. If you specify no map file (the default), addresses relative to the start of the program will be used. The default extension for the map file is .MAP. a:prohst f; this will produce a histogram for the file f.prf in f.hst and no map file will be assumed. a:prohst f,,; this will produce a histogram for f.prf in f.hst and expects a f.map file. a:prohst f,g,k this produces a histogram for f.prf in g.hst and expects a map file k.map. Note that if you select the map option with line numbers, the program will appear to be looping. Never fear, go and have lunch or some other time consuming pastime, and you will be suprised how long it took to produce such a small file. Also, some of the line number/bucket correspondances are not what they might be. Future version shoudl fix this. If you make a better version, be sure to let me have a copy. David Jones.