On 12/31/2018 12:00 PM, simh-requ...@trailing-edge.com wrote:
Control/T support was an optional feature, enabled during SYSGEN, for
some time. I'm fairly sure it was never an undocumented feature, but it
wasn't standard originally.
paul
I decided to dig into the V6C system a bit further. I am amazed at what
I have remembered these 30+ years. I patched SYSTAT.BAS to display the
Pri/RB column that we had available on our V06C-03 system. Even
remembered how to change a protection to <232> using:
PIP SYSTAT.BAC<232> /RE
(not even sure how I recalled that after all these years LOL)
RSTS V06C-03 Timesharing status at 31-Dec-98, 13:16 Up: 24
Job Who Where What Size State Run-Time Pri/RB RTS
1 1,2 Det ERRCPY 5/28K SR 4.7 0/6 BASIC
2 1,4 KB0 SYSTAT 8/28K RN Lck 0.0 -8/6 BASIC
Then I took a look at V06C TTDVR.MAC and that is where it got
interesting. There are references to CONTROL/T support but it is not
calling the mini SYSTAT routine:
TI$CRR:: ;;HANDLE CONTROL/R (RETYPE)
TI$CTT:: ;;HANDLE CONTROL/T (SYSTAT)
.IF NE EKOCTL
BITB #TTECTL,TTMODE(R1) ;;ECHO CONTROL MODE?
BNE TTNORM ;;YES, MAKE A NORMAL CHARACTER
.ENDC ;EKOCTL
CALL TTISGL ;;CHECK FOR SPECIAL MODE(S)
BNE TTNORM ;;MAKE NORMAL CHARACTER IF ANY
BIT #TTFUNC,TTCHAR(R1) ;;ALLOWING SPECIAL FUNCTION CHARACTER
S?
BNE TTNORM ;;NOPE, MAKE A NORMAL CHARACTER
CMP R2,#'R-100 ;;IS IT CONTROL/R?
BNE 40$ ;;NOPE, IT IS CONTROL/T
CALL ASCOUE,R5,TTICRC ;;ANNOUNCE WITH "^R"<CR><LF>
MOV R5,-(SP) ;;SAVE R5
MOV TTINPT+EP(R1),R5 ;;GET THE CURRENT EMPTY POINTER
BIT #TT2741!TAPE!NOECHO,DDFLAG(R1) ;;SHOULD WE DO THIS?
BEQ 30$ ;;YES
10$: MOV (SP)+,R5 ;;RESTORE R5
RETURN ;;EXIT
20$: MOV -40(R5),R5 ;;GET NEXT BUFFER IN CHAIN
30$: CMP R5,TTINPT+FP(R1) ;;MORE CHARACTERS?
BEQ 10$ ;;NO, DONE
BIT R5,#40-1 ;;YES, MORE ROOM IN THIS BUFFER?
BEQ 20$ ;;OUT OF ROOM, GO TO NEXT BUFFER
MOVB (R5)+,R2 ;;ROOM, GET THE CHARACTER
BIC #^C<177>,R2 ;;TRIM OFF ANY JUNK
CALL CHOUTO ;; AND OUTPUT IT
BR 30$ ;; THEN LOOP
40$: JMP TTSYST ;;GO DO THE MINI SYSTAT
TMPORG TTSYST
TTSYST: JMP TTNORM ;;MAKE IT A NORMAL CHARACTER
The TTSYST label simply reverts control-T to a normal character without
calling the mini SYSTAT routine (wherever it is located). Checking the
V7.0 TTDVR.MAC code I see there is support to call the routine:
40$: CALL MAPPED,R5,TTSYST ;;GO TRY FOR A MINI SYSTEM (USING PAR6
CODE)
BCS TTNORM ;;NOT LEGAL NOW, MAKE A NORMAL CHARACTER
RETURN ;;DONE, JUST RETURN
TMPORG TTSYST
TTSYST: SEC ;;SAY MINI SYSTAT NOT LEGAL (UNLESS
OVERLAID)
RETURN ;; AND EXIT
UNORG
I did my own V06C SYSGEN and there is no option to build it in like
there is in a V7.0 SYSGEN. I can only imagine the site we were using,
Nassau County New York's BOCES system that was shared by schools all
over the county, had some additional, possibly experimental, patches
that were not part of the base V06C-03. As I noted earlier, our
control-T functionality was controlled by the SET CTRL/R command and if
control-R was turned off in TTYSET, so was control-T. Also we
non-privileged users could see our job priority which was a feature that
was removed for non-privileged users in V7.0.
Oh well, it has been an interesting few hours reminiscing with that old
V06C system. The stuff I still recall is amusing. My last on-the-job
work with RSTS/E was at a shop that had a V8.0 system on an 11/34 and a
V9.0 system on an 11/73 back in the fall of 1985. We developers
preferred working on the V9.0 system as it was faster and more "VMS"
like. V8.0 was a very odd duck IMHO.
Robert
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