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;DSKBA







				IDENTIFICATION
				--------------

	PRODUCT CODE:		AH-E323A-DD

	DIAGNOSTIC CODE:	DSKBA

	PRODUCT NAME:	 	DSKBAA0 DECSYSTEM 2020 BASIC
				INSTRUCTION RELIABILITY DIAGNOSTIC (1)

	VERSION:		0.1

	DATE RELEASED:		MARCH 1978

	MAINTAINED BY:		DIAGNOSTIC ENGINEERING

	AUTHOR:			JOHN R. KIRCHOFF

		        COPYRIGHT (C) 1978

	        DIGITAL EQUIPMENT CORPORATION, MAYNARD, MASS.

	THIS SOFTWARE IS FURNISHED UNDER A LICENSE FOR  USE  ONLY  ON  A
	SINGLE COMPUTER SYSTEM AND MAY BE COPIED ONLY WITH THE INCLUSION
	OF THE ABOVE COPYRIGHT NOTICE.   THIS  SOFTWARE,  OR  ANY  OTHER
	COPIES  THEREOF, MAY NOT BE PROVIDED OR OTHERWISE MADE AVAILABLE
	TO ANY OTHER PERSON EXCEPT FOR USE ON SUCH SYSTEM AND TO ONE WHO
	AGREES  TO  THESE  LICENSE TERMS.  TITLE TO AND OWNERSHIP OF THE
	SOFTWARE  SHALL  AT   ALL  TIMES  REMAIN  IN  DIGITAL  EQUIPMENT
	CORPORATION.

	THE INFORMATION IN THIS DOCUMENT IS SUBJECT  TO  CHANGE  WITHOUT
	NOTICE  AND  SHOULD  NOT BE CONSTRUED AS A COMMITMENT BY DIGITAL
	EQUIPMENT CORPORATION.

	DIGITAL EQUIPMENT CORPORATION ASSUMES NO  RESPONSIBILITY FOR THE
	USE  OR  RELIABILITY  OF  ITS SOFTWARE IN EQUIPMENT WHICH IS NOT
	SUPPLIED BY DIGITAL EQUIPMENT CORPORATION.
							MAINDEC-10-DSKBA.TXT
							PAGE 2

			TABLE OF CONTENTS
			-----------------

1.0	ABSTRACT

2.0	REQUIREMENTS

2.1	EQUIPMENT

2.2	STORAGE

2.3	PRELIMINARY PROGRAMS

3.0	PROGRAM PROCEDURES

3.1	LOADING PROCEDURE

3.2	STARTING PROCEDURE

3.3	OPERATING PROCEDURE

4.0	DATA SWITCH FUNCTIONS

5.0	ERRORS

6.0	ITERATION COUNTER

7.0	CYCLE TIME

8.0	OPERATIONAL VARIATIONS

9.0	MISCELLANEOUS

10.0	LISTING
							MAINDEC-10-DSKBA.TXT
							PAGE 3

1.0	ABSTRACT

	THIS DECSYSTEM 2020 BASIC INSTRUCTION RELIABILITY TEST VERIFIES
	THE FUNCTIONALITY OF THE DECSYSTEM 2020 BASIC INSTRUCTIONS.
	THIS PROGRAM TESTS ALL OF THE BASIC INSTRUCTIONS WITH
	THE EXCEPTION OF FIXED POINT MULTIPLY/DIVIDE, FLOATING 
	POINT AND BYTE.

	IN THE MAJORITY OF CASES EACH INSTRUCTION IS TESTED BY
	SIMULATING THE INSTRUCTION, WITH SIMPLER INSTRUCTIONS, AND
	THEN EXECUTING THE INSTRUCTION.  RANDOM NUMBERS ARE USED AS
	THE OPERANDS IN AC AND/OR C(E).  THE RESULTS OF THE
	SIMULATION AND EXECUTION ARE COMPARED AND AN ERROR MESSAGE
	IS PRINTED IF THE RESULTS ARE NOT EQUAL.

	IN THE MEMORY AND BOTH MODES A RANDOM NUMBER IS PLACED
	IN THE AC AND C(E) AND A SERIES OF 4 OR 5 INSTRUCTIONS
	ARE EXECUTED.  THE ANSWER IN THE AC AND/OR C(E) IS
	CHECKED AND AN ERROR MESSAGE IS PRINTED IF THE NUMBER
	IS NOT CORRECT.  EACH SET OF 4 OR 5 INSTRUCTIONS ACTS
	ON EACH MEMORY LOCATION FROM THE END OF THE PROGRAM
	TO THE DESIGNATED END OF MEMORY.

	ALSO TESTED ARE ALL OF THE PC SENSITIVE INSTRUCTIONS.  THESE
	INSTRUCTIONS ARE:  JSR, JSA, JSP, JRA, PUSH, POP, PUSHJ
	AND POPJ.  IN THE MAJORITY OF CASES A JRST OR JSP
	BACK TO THE PROGRAM IS PLACED IN EVERY LOCATION FROM
	THE END OF THE PROGRAM TO THE DESIGNATED END OF
	MEMORY.  THE PROGRAM THEN DOES A PC SENSITIVE
	INSTRUCTION TO THE FIRST TESTING LOCATION.  WHEN
	THE PROGRAM RETURNS, A CHECK IS MADE TO SEE THAT
	THE PC SENSITIVE INSTRUCTION WENT TO THE RIGHT ADDRESS.
	IF IT DIDN'T, AN ERROR MESSAGE IS PRINTED.  THE
	MEMORY ADDRESS IS THEN INCREMENTED AND THE PC
	SENSITIVE INSTRUCTION REPEATED.  THE PROGRAM ALSO
	INCLUDES A DEFER TEST AND BOTH INDIRECT AND INDEXING
	ARE TESTED.
							MAINDEC-10-DSKBA.TXT
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2.0	REQUIREMENTS

2.1	EQUIPMENT

	A DECSYSTEM 2020 EQUIPPED WITH A MINIMUM OF 32K OF MEMORY
	CONSOLE PROCESSOR
	CONSOLE TELETYPE
	LOAD DEVICE

2.2	STORAGE

	THE PROGRAM RUNS WITHIN 32K OF MEMORY.

2.3	PRELIMINARY PROGRAMS

	PREVIOUS PROCESSOR DIAGNOSTICS

3.0	PROGRAM PROCEDURES

3.1	LOADING PROCEDURE

	THIS DIAGNOSTIC REQUIRES THAT THE DECSYSTEM 2020 SUBROUTINE
	PROGRAM BE RESIDENT IN THE PDP-10.

	FOLLOW THE APPROPRIATE DIAGNOSTIC LOADING PROCEDURES.
							MAINDEC-10-DSKBA.TXT
							PAGE 5

3.2	STARTING PROCEDURE

	A.  SELECT OPERATIONAL CONSOLE DATA SWITCH SETTINGS (REFER TO
	    4.0 DATA SWITCH FUNCTIONS).

	B.  THE FOLLOWING QUESTIONS WILL BE ASKED TO 
	    SELECT THE OPERATIONAL SWITCHES:

		    TELETYPE SWITCH CONTROL ? 0,S OR Y (CR) -

		    IF THE OPERATOR TYPES "Y", THE FOLLOWING QUESTIONS
		    ARE ASKED AND THE OPERATOR RESPONDS BY TYPING
		    THE ANSWER AS SIX OCTAL DIGITS REPRESENTING
		    THE DESIRED SWITCH SETTINGS.

		    SPECIFY LH SWITCHES IN OCTAL-

		    SPECIFY RH SWITCHES IN OCTAL-

		    IF THE OPERATOR TYPES "0", ZERO'S ARE USED FOR
		    THE SWITCH SETTINGS.

		    IF THE OPERATOR TYPES "S", PREVIOUSLY SET SWITCHES
		    ARE USED.  THIS IS ONLY VALID UPON RESTARTING
		    OF AN INTERRUPTED PROGRAM.
							MAINDEC-10-DSKBA.TXT
							PAGE 6

3.3	OPERATING PROCEDURE

	NORMAL OPERATION WITH ALL SWITCHES SET TO ZERO IS QUICK
	VERIFY MODE.  TO RELIABILITY TEST SET THE "RELIAB" SWITCH.
	WITHOUT EITHER THE OPRSEL SWITCH OR THE RELIAB SWITCH SET OR
	THE MEMORY SIZE SELECTED VIA THE SWITCHES THE PROGRAM WILL
	RUN USING ONLY 32K.  SETTING JUST THE OPRSEL SWITCH ALLOWS
	THE PROGRAM TO RUN IN QUICK VERIFY MODE USING ALL AVAILABLE
	MEMORY.

	A.  TO THROUGHLY TEST ALL HARDWARE, ALL TEST CONTROL DATA 
	    SWITCHES SHOULD BE SET TO 0.

	B.  WHEN DEBUGGING HARDWARE, SET SWITCHES TO 0.  ALLOW THE 
	    TELETYPE TO PRINT THE ERROR MESSAGES.  THIS ALLOWS THE 
	    PROGRAM TO RUN A COMPLETE PASS AND THEN THE ERROR MESSAGES
	    MAY BE CORRELATED TO QUICKLY DIAGNOSE THE FAILURE.  IF A
	    HARDWARE PROBLEM IS SUCH THAT THE ERROR MESSAGES, AFTER THE
	    FIRST ONE, HAVE NO MEANING (FIRST ERROR CAUSES ALL FOLLOWING
	    TESTS TO FAIL) SET THE LOOP ON ERROR SWITCH AND RESTART THE
	    TEST FROM THE BEGINNING.  THE FIRST FAILURE WILL THEN CAUSE
	    THE PROGRAM TO ENTER A LOOP SUITABLE FOR SCOPING.

	    THE ERROR MESSAGE USED IN CONJUNCTION WITH THE LISTING AND
	    SCOPING IF NECESSARY SHOULD ALLOW THE FAILING CONPONENT 
	    TO BE ISOLATED AND REPLACED AND/OR REPAIRED.

	C.  WHEN TAKING MARGINS, SET DATA SWITCHES 'NOPNT' AND 'DING'.
	    THIS WILL INHIBIT PRINTOUT BUT WILL ALLOW THE TELETYPE
	    BELL TO BE RUNG WHEN A ERROR OCCURS.  IF THE MARGIN OBTAINED
	    IS UNACCEPTABLE, THE OPERATOR MAY REVERT TO STANDARD SWITCH
	    SETTINGS FOR DEBUGGING PURPOSES.

	D.  ERROR INFORMATION MAY BE OBTAINED QUICKLY BY PRINTING 
	    ERRORS ON THE LINE PRINTER.

	E.  IN THE EVENT OF A PRINT ROUTINE FAILURE THE 'NOPNT' SWITCH
	    AND THE 'ERSTOP' SWITCH MAY BE SET TO INHIBIT PRINTOUT 
	    BUT HALT THE PROGRAM POINTING TO THE ERROR.

							MAINDEC-10-DSKBA.TXT
							PAGE 7

4.0	DATA SWITCH FUNCTIONS

	SWITCH		STATE	FUNCTION
	------		-----	--------

	0    ABORT	0	NORMAL OPERATION
			1	ABORT AT END OF PASS

	1    RSTART		NOT USED
	2    TOTALS		NOT USED

	3    NOPNT	0	NORMAL TYPEOUT
			1	INHIBIT ALL PRINT/TYPEOUT (EXCEPT FORCED)

	4    PNTLPT	0	NORMAL OUTPUT TO TTY
			1	PRINT ALL DATA ON LPT

	5    DING	0	NO FUNCTION
			1	RING TTY BELL ON ERROR

	6    LOOPER	0	PROCEED TO NEXT TEST
			1	ENTER SCOPE LOOP ON TEST ERROR

	7    ERSTOP	0	NO FUNCTION
			1	HALT ON TEST ERROR

	8    PALERS	0	PRINT ONLY FIRST ERROR WHEN LOOPING
			1	PRINT ALL ERRORS, EVEN IF SAME ERROR

	9    RELIAB	0	FAST CYCLE OPERATION
			1	RELIABILITY MODE - USE ALL OF MEMORY

	10   TXTINH	0	PRINT FULL ERROR MESSAGES.
			1	INHIBIT COMMENT PORTION OF ERROR MESSAGES.

	11   INHPAG	0	ALLOW PAGING AND TRAP ENABLE
			1	INHIBIT PAGING AND TRAPPING

	12   MODDVC		NOT USED

	13   INHCSH	0	ALLOW CACHE USE
			1	INHIBIT CACHE

	14   OPRSEL	0	RUN IN 32K UNLESS RELIAB MODE
			1	USE ALL AVAILABLE MEMORY
							MAINDEC-10-DSKBA.TXT
							PAGE 8
4.0	DATA SWITCH FUNCTIONS (CON'T)

	RIGHT HALF SWITCHES
	-------------------
	27-35		SIZE OF MEMORY, HIGH ORDER 9 BITS
			LOW ORDER 9 BITS ARE APPENDED AS 1'S

	THE SIZE OF MEMORY IS DETERMINED BY:
	A.  EXEC MODE
	    1.  SWITCHES 27-35 = 0, USE AVAILABLE MEMORY
	    2.  SWITCHES 27-35 INDICATE SIZE OF TESTED MEMORY, (32K=77).
	B.  USER MODE
	    CONTENTS OF 'JOBREL', LOC 44, DETERMINE SIZE OF MEMORY.
	    SELECT DESIRED SIZE WHEN LOADING PROGRAM.

5.0	ERRORS

	ERRORS ARE PRINTED ON THE TTY OR LINE PRINTER.  THE ERROR 
	PRINTOUT CONTAINS THE TEST TITLE, THE PC OF THE FAILURE, AC
	NUMBER, ERROR WORD AND CORRECT WORD.

	THE PC VALUE IS USEFUL IN RELATING THE FAILURE TO THE LISTING.

	WHEN THE SCOPE LOOP MODE IS USED, IF AN AUDIO INDICATION OF
	A CONTINUING ERROR IS DESIRED THE 'DING' SWITCH MAY BE SET.

	THE FOLLOWING IS THE DIFFERENT ERROR FORMATS WITH THEIR
	RESPECTIVE UUO'S AND ERROR MESSAGES.

	A.	ERROR #1  -  ERR   AC,E
	-------------------------------

	EXAMPLE:			AC		E
	2053 / CAME   AC1,AC2		;RESULT		CORRECT
	2054 / ERR    AC,RAN1		;ORIG  C(AC)	ORIG C(E)

	AC1=5				;TEST DATA
	C(AC1) = 201532107642
	C(AC2) = 201432107642
	C(RAN1)= 777777777777
	C(AC)  = 576345670135

	ERROR MESSAGE:
				   	(SOURCE OF NUMBERS PRINTED)
	PC =   002054			;PC OF ERROR UUO
	AC =   05			;AC FIELD OF UUO-1
	C(AC)= 201532107642		;C(C(AC)) OF UUO-1
	COR =  201432107642		;C(C(ADDRESS FIELD)) OF UUO-1
	    ORIGINAL
	C(AC)= 777777777777		;C(C(ADDRESS FIELD)) OF UUO
	C(E) = 576345670135		;C(C(AC)) OF UUO
							MAINDEC-10-DSKBA.TXT
							PAGE 9

5.0	ERRORS (CON'T)

	B.	ERROR #2  -  ERRM   AC,E
	--------------------------------

	EXAMPLE:			AC		E
	2053 / CAME   AC2,MUD		;CORRECT	RESULT
	2054 / ERRM   AC,RAN1		;ORIG  C(AC)	ORIG C(E)

	MUD=5033			;TEST DATA
	C(MUD) = 201532107642
	C(AC2) = 201432107642
	C(RAN1)= 777777777777
	C(AC)  = 576345670135

	ERROR MESSAGE:

				   	(SOURCE OF NUMBERS PRINTED)
	PC =   002054			;PC OF ERROR UUO
	E  =   5033			;BITS 18-35 (E) OF UUO-1
	C(E) = 201532107642		;C(C(E)) OF UUO-1
	COR =  201432107642		;C(C(AC)) OF UUO-1
	    ORIGINAL
	C(AC)= 777777777777		;C(C(E)) OF UUO
	C(E) = 576345670135		;C(C(AC)) OF UUO
							MAINDEC-10-DSKBA.TXT
							PAGE 10

5.0	ERRORS (CON'T)

	C.	ERROR #3  -  ERRI   AC,E
	--------------------------------

	EXAMPLE:			AC		E
	2053 / CAME   AC1,AC2		;RESULT		CORRECT
	2054 / ERRI   RAN1,(AC)		;ORIG C(AC)	ORIG E

	AC1=5				;TEST DATA
	C(AC1) = 107742670135
	C(AC2) = 107642670135
	C(RAN1)= 777777777777
	C(AC)  = 576345670135

	ERROR MESSAGE:

				   	(SOURCE OF NUMBERS PRINTED)
	PC =   002054			;PC OF ERROR UUO
	AC =   5			;AC FIELD OF UUO-1
	C(AC)= 107742670135		;C(C(AC)) OF UUO-1
	COR =  107642670135		;C(C(E)) OF UUO-1
	    ORIGINAL
	C(AC)= 777777777777		;C(C(AC)) OF UUO
	E    = 670135			;C(ADDRESS FIELD) OF UUO

	D.	ERROR #4  -  ERROR   AC,E
	---------------------------------

	EXAMPLE:			AC		E
	2053 / CAME   AC,RAN	
	2054 / ERROR  AC,RAN		;RESULT		CORRECT

	AC=5				;TEST DATA
	C(AC)  = 201532107642
	C(RAN) = 201432107642

	ERROR MESSAGE:

				   	(SOURCE OF NUMBERS PRINTED)
	PC =   002054			;PC OF ERROR UUO
	AC =   5			;AC FIELD OF UUO
	C(AC)= 201532107642		;C(C(AC)) OF UUO
	COR =  201432107642		;C(C(E)) OF UUO
							MAINDEC-10-DSKBA.TXT
							PAGE 11

5.0	ERRORS (CON'T)

	E.	ERROR #5  -  ER   AC,[ASCII/MESSAGE/]
	---------------------------------------------

	EXAMPLE:			AC		E
	2053 / JFCL   10,.+2	
	2054 / ER     AC,[ASCII/OV/]	;RESULT		MESSAGE

	AC=5				;TEST DATA
	C(AC)  = 201432107642

	ERROR MESSAGE:

				   	(SOURCE OF NUMBERS PRINTED)
	PC =   002054			;PC OF ERROR UUO
	AC =   5			;AC FIELD OF UUO
	C(AC)= 201432107642 OV		;C(C(AC)) OF UUO
					;ADDRESS FIELD OF UUO POINTS TO AN
					;ASCII MESSAGE

	F.	ERROR #6  -  ERM   AC,E
	-------------------------------

	EXAMPLE:			AC		E
	2053 / SOJ   AC2,	
	2054 / ERM    AC1,(AC2)		;C(AC)		RESULT

	C(AC2)=5033			;TEST DATA
	C(AC)  = 740000005756
	C(C(AC2)=254000004041

	ERROR MESSAGE:

				   	(SOURCE OF NUMBERS PRINTED)
	PC =   002054			;PC OF ERROR UUO
	E  =   5033			;BITS 18-35 (E) OF UUO
	C(AC)= 740000005756		;C(AC) OF UUO
	C(E) = 254000004041		;C(C(E)) OF UUO
							MAINDEC-10-DSKBA.TXT
							PAGE 12

5.0	ERRORS (CON'T)

	G.	ERROR #7  -  ERMM   AC,E
	--------------------------------

	EXAMPLE:			AC		E
	2053 / SOJ   AC2,	
	2054 / ERMM   AC1,(AC2)		;C(AC)		RESULT

	C(AC2)=5033			;TEST DATA
	C(AC1)  = 740000005756

	ERROR MESSAGE:

				   	(SOURCE OF NUMBERS PRINTED)
	PC =   002054			;PC OF ERROR UUO
	E  =   5033			;BITS 18-35 (E) OF UUO
	C(AC)= 740000005756		;C(AC) OF UUO


	H.	ERROR #11  -  EERR    ,E
	--------------------------------

	I.	ERROR #12  -  EERRM   ,E
	--------------------------------

	J.	ERROR #13  -  EERRI   ,E
	--------------------------------

	ERRORS 11,12 AND 13 ARE THE SAME AS ERRORS 1,2 AND 3 EXCEPT
	THAT THE AC OF THE UUO IS REPLACED BY C(RAN).  IN
	OTHER WORDS C(RAN) WILL BE PRINTED FOR THE ORIGINAL
	C(E).
							MAINDEC-10-DSKBA.TXT
							PAGE 13

6.0	ITERATION COUNTER

	THE PASS COUNT IS TYPED OUT ON THE CONSOLE TELETYPE.

7.0	CYCLE TIME

	THE CYCLE TIME DEPENDS UPON MEMORY SIZE AND INCREASES AS
	MEMORY SIZE INCREASES.

	A.  NORMAL OPERATION - APPROXIMATELY ONE MINUTE IN 32K.

	B.  RELIABILITY MODE - APPROXIMATELY 3 TO 5 MINUTES.

8.0	OPERATIONAL VARIATIONS

	A.  DIAGNOSTIC MONITOR

	    THE PROGRAM IS USABLE WITH THE DIAGNOSTIC MONITOR TO PROVIDE
	    RELIABILITY TESTS, ACCEPTANCE TESTS, AND/OR TO PROVIDE A
	    QUICK METHOD OF ISOLATION OF A FAULT TO A PARTICULAR AREA
	    OF THE PROCESSOR.  CERTAIN PROCEDURES ARE USED WHEN THE
	    PROGRAM IS USED IN THIS MANNER.  THEY ARE:

	    1.	THE DIAGNOSTIC MONITOR TRANSFERS CONTROL TO THE PROGRAM
		AND STARTS IT AT LOCATION 30002.

	    2.	MONCTL - LOCATION 30043 IS USED AS THE DIAGNOSTIC MONITOR
		CONTROL WORD.
			LH = 0, STAND-ALONE OPERATION
			    -1, RUNNING UNDER DIAGNOSTIC MONITOR

			RH = RIGHT HALF OF CONSOLE SWITCHES IF UNDER
			     DIAGNOSTIC MONITOR CONTROL.
							MAINDEC-10-DSKBA.TXT
							PAGE 14

8.0	OPERATIONAL VARIATIONS (CON'T)

	B.  USER MODE

	    TO OUTPUT THE PRINTED ERROR MESSAGES TO A USER SPECIFIED
	    DEVICE IN USER MODE, ASSIGN THE DESIRED OUTPUT DEVICE TO
	    DEVICE NAME 'DEV' AND SET SWITCH 'PNTLPT'.  THE PHYSICAL
	    DEVICE USED CAN BE ANY DEVICE THAT CAN ACCEPT ASCII OUTPUT
	    FORMAT SUCH AS LPT, DSK, DTA, ETC.  THE CORRESPONDING 
	    OUTPUT FILE IS 'DSKBA.LPT'

	    EXAMPLE DEVICE ASSIGNMENT:

	    .ASSIGN DSK DEV

	    IN USER MODE THE PROGRAM WILL MAKE 1000(8) PASSES AND THEN
	    RETURN TO DIAMON COMMAND MODE.

	THE OUTPUT FILE (IF USED) MAY THEN BE LISTED BY USING THE
	NORMAL MONITOR COMMANDS (PRINT, LIST, TYPE, PIP, ETC.).

	IF THE PROGRAM IS ABORTED BEFORE COMPLETION (BY ^C, ETC.) THE
	OUTPUT FILE MAY BE CLOSED BY USING THE MONITOR 'REENTER' 
	COMMAND.

	C.  SYSTEM EXERCISER

	    START ADDRESS IS 30003.  DATA SWITCHES ARE PRESTORED IN
	    'SWTEXR' LOC 30023.

9.0	MISCELLANEOUS

	THE NON-EX-MEMORY AND PARITY STOP SWITCHES SHOULD BE RESET 
	(0).  THESE ERRORS, ILLEGAL UUO'S AND OTHER ERRORS OF THIS
	TYPE ARE HANDLED BY PRINTOUT ON THE TELETYPE.

10.0	LISTING