/ GT.PA TEKTRONIX 4006-1 HANDLER / RON LARKIN, FEBRUARY 1977 / ADAPTED FROM DEC'S TELETYPE HANDLER, FILE KL8E.PA *0 -1 DEVICE KL8J;DEVICE TTY;0;TTY&177+4000;ZBLOCK 2 /TWO-PAGE TEKTRONIX 4006-1 HANDLER FOR OS/8 V3. /ON INPUT, RECOGNIZES ^Z, ^C, ^U, RUBOUT /^Z MEANS END OF INPUT, INSERT ^Z IN BUFFER, / PAD WITH ZEROES, AND ECHO "^Z" /^C MEANS ABORT JOB, RETURN TO OS/8 VIA LOC 7600 TO SAVE CORE AND PRINT "^C" /^U MEANS DELETE THE LAST LINE, ALLOW OPERATOR TO RETYPE / (LINE STARTS AT BEGIN OF BUFFER AND IS TERMINATED BY A CR) / A CR GETS ENTERED INTO BUFFER, CAUSES A LF TO ALSO ECHO / AND GET ENTERED INTO BUFFER, BUFFER IS THEN PADDED WITH NULLS. /ON OUTPUT RECOGNIZES ^C, ^O FROM KEYBOARD /^C CAUSES JOB TO ABORT, RETURN TO OS/8 VIA LOCATION 7600 / TO SAVE CORE AND PRINT "^C" /^O CAUSES ECHOING BY THE HANDLER TO CEASE / TYPING ANY OTHER CHARACTER RESUMES ECHOING. /WHENEVER PRINTING CHARACTERS (EITHER ON OUTPUT OR WHEN ECHOING), / IGNORES NULLS / FLAGS LC WITH AN APOSTROPHE / HANDLES TABS CORRECTLY (SEVERAL WAYS) / PRINTS ESCAPE AS $ / PRINTS CONTROL CHARACTERS AS "^K" /THE TERMINAL DOES AUTOMATIC CR/LF AT END OF LINE WIDTH. /MAINTENANCE RELEASE CHANGES: /1. ADDED KCC FOR NON-CONSOLE TELETYPES (IN SUBROUTINE TTYTST) INDVC=03 OUTDVC=04 KSF=10^INDVC+6001 KCC=10^INDVC+6002 KRS=10^INDVC+6004 KRB=KCC KRS TSF=10^OUTDVC+6001 TCF=10^OUTDVC+6002 TPC=10^OUTDVC+6004 TLS=TCF TPC TTYVERSION="A&77 /BUILD YOUR OWN TELETYPE HANDLER: /THE FOLLOWING CONDITIONALS ALLOW YOU TO INCLUDE OPTIONAL FEATURES. /YOU MAY INCLUDE AS MANY OR AS FEW AS YOU DESIRE PROVIDED THERE /IS ROOM LEFT. /CONDITIONAL LOCATIONS LOCATIONS INCLUDED /VARIABLE PAGE 1 PAGE 2 FEATURES / DELAY 0 7 DELAY AFTER GIVEN CHAR / CTRL 0 3 PRINT CONTROL CHARS AS ^K / RUB 0 0 PRINT CHAR RUBBED OUT ON RUBOUTS / SIMTAB 0 10 SIMULATE TABS AS SPACES / ESC 0 10 PRINT ESCAPE AS $ / ALTMOD 0 7 CONVERT ALTMODE (175) TO ESCAPE (33) / BOTTOM 0 24 /PAUSE AT BOTTOM OF SCREEN / FREE LOCS: 3 0 CTRL=1 /SET TO 1 TO ECHO CONTROL CHARS AS ^K /SET TO 0 TO ACCEPT CONTROL CHARACTERS AND PUT /IN BUFFER, BUT NOT ECHO THEM (EXCEPT THE USUAL) SIMTAB=1 /SET TO 1 TO SIMULATE TABS AS THE CORRECT NUMBER OF SPACES /SET TO 0 TO TYPE TABS AS TABS ALTMOD=1 /SET TO 1 TO CONVERT 175,176 TO 33 /(UPPER CASE TERMINALS ONLY) ESC=1 /SET TO 1 TO ECHO ESCAPE AS $ /SET TO 0 TO ECHO ESCAPE AS A CONTROL CHAR (^[) BOTTOM=1 /SET TO 0 FOR NO PAUSE AT BOTTOM /SET TO 1 FOR PAUSE AT BOTTOM GIVING / OPERATOR TIME TO VIEW /SOME OF THE ABOVE OPTIONS SHOULD ACTUALLY BE IMPLEMENTED /IN SUCH A MANNER THAT THE USER CAN CHANGE THEM VIA AN ALTER /RATHER THAN HAVE TO REASSEMBLE. / DIFFERENCES BETWEEN THIS HANDLER AND THE DEC TTY / HANDLER (LATTER IS FILE KL8E.PA VERSION D) / "(H)" INDICATES HARDWARE ON 4006-1 PERFORMS THIS FUNCTION. / 1. DOES NOT MAKE LOWER CASE INTO UPPER (H) / 2. DOES NOT PRINT SINGLE QUOTE TO FLAG LOWER CASE (H) / 3. DOES NOT PRINT CR/LF AT RIGHT MARGIN (H) / 4. DOES NOT RECOGNIZE ^S NOR ^Q AS SPECIAL COMMANDS. / THE SPEED OF THE VT MAKES THEM SUPERFLUOUS. / 5. VERSION IS E, NOT D / 6. COUNTS LINE FEEDS AND PAUSES AT BOTTOM OF SCREEN. / WHEN READY TO ERASE & DISPLAY MORE LINES, / OPERATOR SHOULD HIT ANY KEY. THE / HANDLER THEN ERASES THE SCREEN, WAITS & PROCEEDS. / 7. DOES NOT CONVERT ASCII 176 ("PREFIX") TO ESCAPE, / SINCE THE HARDWARE CANNOT GENERATE A 176. / 8. GROUP NAME IS KL8J, NOT KL8E / 9. LOCATION "PUNCH" (RELATIVE LOCATION 64) IS / ZERO IN THIS HANDLER BUT NOT IN KL83.PA NOR / ASR33.PA. RESORC USES THIS FACT. /CROSS PAGE LINKAGE: /THIS CODE MUST BE ABLE TO LOAD INTO ANY TWO PAGES OF CORE /THE ENTRY POINT IS AT THE NEXT LOCATION TO THE END OF THE FIRST PAGE /AT THE END OF THE FIRST PAGE WE JMS TO PLINK, /THIS LEAVES THE ADDRESS OF THE FIRST LOCATION OF THE NEXT PAGE /IN LOCATION 'PLINK' . THIS JUST HAPPENS TO BE THE ADDRESS /OF BOTH TTYPCH AND TTYGCH. /TTYPCH AND TTYGCH SHARE THE SAME ENTRY POINT. /IF IT IS CALLED WITH A 0 AC, IT IS A CALL TO TTYGCH, /IF IT IS CALLED WITH A NON-ZERO AC, IT IS A CALL TO TTYPCH. /RETURN 1 MEANS GOT RUBOUT /TTYGCH TAKES RETURN 2 IF IT GOT A ^Z. /OTHERWISE IT TAKES RETURN 3 WITH CHARACTER GOTTEN IN AC. /TTYPCH TAKES RETURN 1 IF IT WANTS THE HANDLER TO GO AWAY, /I.E IF IT SAW A ^Z. /AC IS ZERO UPON RETURN /WHEN ECHOING WE WANT TO CALL TTYPRT /BUT OTHERWISE WE WANT TO CALL TTYPCH (WHICH DOES ADDITIONAL /STUFF LIKE CHECK ^O, ETC. /WE TELL BY WHETHER OR NOT TTYGCH HAD BEEN PREVIOUSLY CALLED. *200 PLINK, 0 /GETS ADDRESS OF TTYPCH AND TTYGCH (START OF NEXT PAGE) STL CLA RAR /4000 TAD I TTY /RETRIEVE FUNCTION WORD, BUT PUT R/W BIT IN LINK AND L3700 /EXTRACT NUMBER OF DOUBLE-WORDS TO TRANSFER CMA /GET COUNT+1 DCA BUFSIZ /STORE AWAY RDF /FIND OUT THE USER'S DATA FIELD TAD CIFCDF /FORM OUR EXIT CIF CDF DCA TTYXIT /STORE AWAY FOR EXIT ROUTINE TAD TTY70 /GET FUNCTION WORD L776, AND I TTY /ISOLATE FIELD OF BUFFER TAD TTYCDF /FORM CDF TO FIELD OF BUFFER DCA TTCDBF /STORE WHERE IT WILL BE USEFUL /AT SAME TIME, INITIALIZE TTYEOF ISZ TTY /POINT TO BUFFER ADDRESS TAD I TTY /AND GET IT DCA BUFSTRT /AND SAVE IT ISZ TTY /POINT TO BLOCK # TTY376, ISZ TTY /POINT TO ERROR RETURN SHIFT, /OUTPUT SHIFT REGISTER TTYEOF, /0 IF SAW CR OR ^Z AND WISH TO PAD BUFFER WITH 0'S TTCDBF, HLT /CDF BUFFER FIELD JMP TTYKLG TTYLP, SNL CLA /LINK=1 MEANS OUTPUT JMP TTYGET /INPUT IS FROM TTY: /LINK MUST BE SET FIRST TIME THROUGH HERE. /IT ACTS AS A GUARD BIT IN THE SHIFT REGISTER ROTL, RTL RTL SPA /DO WE HAVE 8 BITS SHIFTED IN? JMP TELP DCA SHIFT /SAVE SHIFT REGISTER TAD I BUFSTRT SZA JMS PUNCH /PRINT A CHARACTER TAD I BUFSTRT ISZ BUFSTRT /BUMP INPUT POINTER TT7400, 7400 /PROTECT ISZ. A NOP. AND TT7400 CLL RAL TAD SHIFT /SHIFT HIGH ORDER 4 BITS INTO JMP ROTL /SHIFT REGISTER TELP, JMS PUNCH /PRINT 3RD CHARACTER OF DOUBLE-WORD STL /***KLUDGE TTYKLG, ISZ BUFSIZ /DONE? JMP TTYLP /NOT YET TTYX, TAD TTYEOF /IF INPUT AND WE WERE PADDING WITH 0'S SZA CLA /TAKE SOFT ERROR EXIT TTYRTN, ISZ TTY /POINT TO NORMAL RETURN /CAN'T GET ERROR OR END-OF-FILE ON OUTPUT TTYXIT, HLT /RETURN TO USER'S FIELD JMP I TTY /RETURN TO USER TTYCA, 0 TTYWC, 0 BUFSIZ, 0 BUFSTRT,0 TTY70, 70 L7700, 7700 /=SMA CLA / /SEE CHANGE 9, ABOVE PUNCH, 0 /NEVER CALL TTYPCH WITH ZERO AC JMS I PLINK /CALL TTYPCH JMP TTYRTN /GO AWAY, WE SAW A ^Z JMP I PUNCH /RETURN TMP, CRLF, 0 TAD L215 JMS I PLINK /CALL TTYPCH TO PRINT CR L215, 215 /CAN'T RETURN HERE CLA /**** TAD L212 JMS I PLINK /CALL TTYPCH TO PRINT LF L212, 212 /CAN'T RETURN HERE CLA /**** JMP I CRLF /RETURN CTRLU, JMS CRLF /PERFORM A CR/LF TTYGET, TAD BUFSTRT DCA TTYCA /POINT TO START OF BUFFER TAD BUFSIZ CLL RAL /CONVERT DOUBLE-WORDS TO WORDS DCAWC, DCA TTYWC /SET SIZE OF BUFFER TSTEND, TAD TTYEOF SNA CLA JMP ZERO JMS I PLINK /CALL TTYGCH TO GET A CHARACTER JMP RUBOUT /RETURN 1 MEANS SAW RUBOUT ZERO, DCA I TTYCA /RETURN 2 MEANS GOT CHARACTER /STORE AWAY TEMPORARILY /USING USER'S BUFFER AS A TEMP LOCATION TAD I TTYCA /GET BACK CHARACTER SZA JMS PUNCH /ECHO IT TAD I TTYCA /GET IT AGAIN TAD M32 /-^Z SNA JMP CTRLZ TAD L5 /^Z-^U SNA /IS IT ^U? JMP CTRLU /YES TAD L7 GRUDGE, DCA TMP ISZ TTYCA /NO L7, 7 ISZ TTYWC /IS BUFFER FULL? SKP JMP TTYX ISZ TMP /WAS LAST CHAR A CR? JMP TSTEND /NO DCA TTYEOF /YES, SET "PAD WITH 0'S" FLAG ISZ TTY /POINT TO NORMAL RETURN /CR IS NOT AN ERROR OR END-OF-FILE TAD L212 /IF LAST CHAR INPUT WAS CR, NOW PRETEND LF WAS INPUT JMP ZERO /REJOIN PROCESSING CTRLZ, DCA TTYEOF JMS CRLF JMP GRUDGE M32, -32 L5, 5 L3700, 3700 CIFCDF, CIF CDF 0 TTYCDF, CDF 0 /TTYEOF IS ZERO MEANS PAD BUFFER WITH ZEROES RUBOUT, KCC /TTYGCH DOESN'T CLEAR RO FROM BUFFER TAD TTYCA CIA TAD BUFSTRT SNA CLA /ARE WE AT BEGIN OF BUFFER? JMP CTRLU /YES STA TAD TTYCA DCA TTYCA TAD I TTYCA /PRINT CHAR JUST DELETED JMS PUNCH STA TAD TTYWC JMP DCAWC /BUMP BACK WC AND GET ANOTHER CHAR ZBLOCK 376-. /HANDLER SHOULD PAD WITH 0'S (RESORC) TTY, TTYVERSION /ENTRY POINT TO HANDLER JMS PLINK /SET UP CROSS PAGE LINKAGE IFNZRO TTY-376 PAGE /INTERLUDE: /USA STANDARD CODE FOR INFORMATION INTERCHANGE: / 000 001 010 011 100 101 110 111 / / 0000 NUL DLE SP 0 @ P ' 'P / / 0001 SOH DC1 ! 1 A Q 'A 'Q / / 0010 STX DC2 " 2 B R 'B 'R / / 0011 ETX DC3 # 3 C S 'C 'S / / 0100 EOT DC4 $ 4 D T 'D 'T / / 0101 ENQ NAK % 5 E U 'E 'U / / 0110 ACK SYN & 6 F V 'F 'V / / 0111 BEL ETB ' 7 G W 'G 'W / / 1000 BS CAN ( 8 H X 'H 'X / / 1001 HT EM ) 9 I Y 'I 'Y / / 1010 LF SUB * : J Z 'J 'Z / / 1011 VT ESC + ; K [ 'K '[ / / 1100 FF FS , < L \ 'L '\ / / 1101 CR GS - = M ] 'M '] / / 1110 SO RS . > N ^ 'N '^ / / 1111 SI US / ? O _ 'O '_ / /TTYGCH: GETS A CHAR FROM KBD / IF GOT ^Z, IT SETS TTYEOF FLAG / LEAVES IT IN AC IN 7-BIT /TTYPRT: PRINTS CHAR IN AC ON TTY / IGNORES NULLS / PRINTS ^X ON CONTROL CHARS (EXCEPT CR, LF, FF, VT, TAB) / PRINTS 'X ON LOWER CASE /HANDLES TABS CORRECTLY / PRINTS ESCAPE AS $ /TTYTLS: USED TO ACTUALLY PRINT CHAR / IT HANDLES TABS AUTOMATICALLY /TTYPCH: IT USES TTYPRT TO PRINT CHAR BUT ALSO RESPONDS TO / ^C, ^O, ^S, ^Q. / IF ^Z IS BEING PRINTED, IT THEN STOPS FURTHER PRINTING /MUST BE AT TOP OF PAGE TTYPCH, /ENTRY POINT TO TTY PUNCH ROUTINE /OR TTY PRINT ROUTINE TTYGCH, 0 /ENTRY POINT TO TTY GET CHAR ROUTINE SNA JMS TGCH /ZERO AC-MEANT CALL TO TTYGCH PCH, AND (177 /FORCE TO 7-BIT DCA TCHAR TAD TGCH SZA CLA /ARE WE ECHOING? JMP ECHO /YES, IGNORE ^Z AND ^O TAD TCHAR TAD (-32 /CONTROL-Z? SNA CLA JMP I TTYPCH /YES JMS TTYTST TAD (203-217 /NO SNA CLA /WAS SNA IN KL8E.PA. ^O? DCA TCHAR /YES, SET TO NULL SO IT WILL BE IGNORED ECHO, DCA TGCH /NO. ZERO TGCH TO SIGNAL NON-ECHO ISZ TTYPCH /BUMP TTYPCH FOR NON-^Z RETURN. IFNZRO ESC < TAD TCHAR TAD (-33 /ESCAPE SZA CLA JMP .+3 TAD (44 /$ DCA TCHAR > TAD TCHAR SNA JMP TTYCTO /IGNORE NULLS TAD (-16 TTY100, CLL TAD (5 /11 OCTAL=HORIZONTAL TAB TTY240, SZA /TAB? JMP NOTAB /NO IFNZRO SIMTAB < TTYTAB, TAD TTY240 /NOTE: TERMINAL HARDWARE WOULD JMS TTYTLS /SPACE NOW, BUT IT NEVER SEES TAB. TTY7, 7 /HERE FOR NO SPECIAL REASON TAD TABCTR AND TTY7 SZA CLA JMP TTYTAB JMP TTYCTO > NOTAB, SZL CLA JMP SPCHR /DON'T UPARROW CHARS LF,CR,TAB,VT,FF TAD TCHAR /NO, GET BACK CHAR AND TTY140 /HIGH ORDER BITS IRRELEVANT IFNZRO CTRL < M40, SMA SZA CLA /CAN'T BE NEGATIVE JMP PRIN /NOT A CONTROL CHARACTER TAD TTYUPA /ECHO 201-237 AS ^X (EXCEPT 211-215) JMS TTYTLS TAD TTY100 /ADD X100 TO ^K TO GET K PRIN, TAD TCHAR JMS TTYTLS TTYCTO, JMP I TTYPCH /RETURN WITH ACC ALWAYS 0 SPCHR, IFNZRO BOTTOM TTY140, STA CLL TAD LINSIZ DCA TABCTR /THESE CHARS RESET COLUMN COUNTER JMP PRIN TGCH, 0 /NON-ZERO MEANS TTYGCH WAS CALLED KSF JMP .-1 /WAIT FOR CHAR TO BE TYPED JMS TTYTST TAD (203-377 SNA CLA /TAKE RETURN 1 ON RUB OUT JMP I TTYGCH /"CLUMSY" - R.L. (9/18/73) ISZ TTYGCH KRB /GET CHARACTER TTYAND, AND (177 /MUST RETURN CHAR IN 7-BIT IFNZRO ALTMOD < TAD (-175 /IS IT 175? SNA /4006-1 CAN'T XMIT 176 TAD (33-175 /YES. CONVERT ALTMODE TO ESCAPE TAD (175 /NO, RESTORE CHAR > JMP I TTYGCH /TAKE RETURN 3 /SHOULDN'T TABCTR BE INITIALIZED TO C(LINSIZ) UPON ENTRY? TABCTR, -110 TTYTLS, 0 TLS TTYTSF, TSF JMP .-1 ISZ TABCTR TTYUPA, "^ TT7600, 7600 JMP I TTYTLS LINSIZ, -110 IFNZRO BOTTOM < LFCNT, -40 /SERVES AS LINE COUNT & ALLOWS M40 /TO BE USED TO RESET LFCNT AND TO SET UP /WAIT LOOP TIMING AFTER ERASE, SAVING /2 CRITICAL LOCATIONS. > TCHAR, 0 /TTYTST: READS KEYBOARD STATICALLY AND RESPONDS TO ^C / OTHERWISE RETURNS CHAR (8-BIT) MINUS 203 IN AC. / IF FLAG IS NOT UP, IT RETURNS A 1. TTYTST, 0 TAD TT7600 /OR CHAR IN KRS TAD (-7603 /-7603=175 KSF CLA IAC /STUFF IN BUFFER IS UNRELIABLE IF FLAG ISN'T UP SZA JMP I TTYTST IFNZRO INDVC-3 CIF CDF 0 /BRANCH TO OS/8 MONITOR AT 07600 JMP I TT7600 /IT WILL PRINT "^C" FOR CHAR IN BUFFER PAGE IFDEF TEST < *600 /TEST ROUTINE FOR KL8E HANDLER GO, JMS I (TTY /CALL HANDLER 0600 /READ SIX PAGES 1000 /BUFFER AT 01000 0001 /BLOCK 1 HLT /ERROR RETURN JMS I (TTY /CALL HANDLER AGAIN 4600 /OUTPUT SIX PAGES 1000 0001 HLT CLA JMP GO > $