[HECnet] SCSISE adapter -> listings

Clem Cole <clemc at ccc.com> writes: On Mon, Jan 14, 2013 at 4:02 PM, Brian Schenkenberger, VAXman- < system at tmesis.com> wrote: BLISS has no I/O, and if you want to be pedantic, nor does C. I/O is all via support libraries which provide I/O. Neither language has any inherent I/O syntax. A BLISS coder would call some VMS RTL or delve > into $QIO to do I/O. > Absolutely correct. Sorry to confuse >>in practice<< it was two different models, but you are right, the languages did not force an I/O model in the language semantics. So the the issue degenerates to VMS RMS (record I/O - from the IBM mainframe) vs stream I/O - the C/Multics (byte stream) style. When VAX was first envisioned GB et al, wanted a machine to go after the 360/370 family. An efficient RMS was considered a requirement and the crew did an amazing job. It was small, fast and worked extremely well. I t was complicated but lots of people and it sounds like you are/were in that camp, loved it. But after VAX-11C was released and stream I/O installed, engineering discovered that stream I/O was preferred by more people, and in particular us OS types discovered we preferred it. FYI: Dave added stream I/O to VMS for VAX-11/C (urban legend is in an weekend - but I really do not think that was true - I was not on the VMS team, although a number of my friends were). My memory is hazy here, but I think there was a point where the compiler team rewrote the FTN runtime support from RMS into stream code soon their after and "their was much rejoicing." They are likely to have done it in BLISS, but again, I'd have to ask one the old compiler guys that actually did the work and few are left. As I said in a previous message I still see Grove socially every so often, but since he retired a few years ago; he's not as accessible. If you have a specific question, that I do not know the answer, I >>might<< be able to find some one that can. But I'd prefer this off-list, please send it to me directly, with a working return email address. WRT VAX C, I'd have to pull out an old V5.n release and install it to be certain but DEC C I/O is just a wrapper around RMS, et al. It HAS to be or RMS CDC simply would not function... and it most certainly does! WRT the Fortran RTL rewrite: I haven't looked; however, the COBOL RTL has certainly been rewritten in recent times in C. It caused me many too many a headache trying to deal with Pthreads in the midsts of RMS's own unique threading to implement CDC. There weren't real Pthread threads but due to resourcing the COBOL RTL in C, the excess baggage of the TEB came along in every I/O. -- VAXman- A Bored Certified VMS Kernel Mode Hacker VAXman(at)TMESIS(dot)ORG Well I speak to machines with the voice of humanity.