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^^A ^MULTI-^FUNCTIONAL ^COMMUNICATIONS ^SOFTWARE ^PACKAGE\\
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BY
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^ELIE ^MAY
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^UNIVERSITY ^COMPUTER ^CENTER
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^UNIVERSITY OF ^MINNESOTA
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^I.  ^OBJECTIVES
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.TAB STOPS 8,16,24,32
	^A.  ^MULTI-^FUNCTIONALITY
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		1.  ^SUPPORT MODE
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		2.  ^EMULATION MODE
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		3.  ^MULTI-PROTOCOL FACILITATION
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		4.  ^EASILY ADAPABLE TO NEW NEEDS
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	^B.  ^MODULARITY
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		1.  ^INTERCHANGEABLE MODULES
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		2.  ^STANDARD INTERFACES
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^I^I.  ^APPLICATIONS
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	^A.  ^^PDP\\ TO ^UNIVERSITY OF ^MINNESOTA ^NETWORK ^COMMUNICATIONS
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	^B.  ^UNIVAC 1004 TERMINAL COMMUNICATION
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	^C.  ^UNIVAC 1004 DIAGNOSIS
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	^D.  ^COMMUNICATIONS STATISTICS GATHERING
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	^E.  ^REMOTE BATCH TERMINAL USING ^^DDCMP\\
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	^F.  ^^PDP\\ TO ^^PDP\\ COMMUNICATIONS.
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^^III\\.  ^SYSTEM ORGANIZATION
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	^A.  ^INTERCHANGEABLE MODULES
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		1.  ^EXECUTIVE
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		2.  ^LIBRARY
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		3.  ^OPERATING SYSTEM INTERFACE
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		4.  ^DEVICE SUPPORT
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		5.  ^INFORMATION PROCESSOR
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	^B.  ^LEVELS
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		1.  ^MACRO ^LIBRARY
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		2.  ^SYSTEM INTERFACES AND DEFINITIONS
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		3.  ^SITE CONFIGURATION AND IDENTIFICATION
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		4.  ^INSTRUCTION CODE
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^^IV\\.  ^FUNCTION OF THE MODULES
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	^A.  ^EXECUTIVE
		1.  ^TASK INITIATION
		2.  ^TASK SCHEDULING
		3.  ^CONSOLE DEVICE SUPPORT
			A.  ^DUMP REQUESTS (WORD, BYTE, DECIMAL , ETC.)
			B.  ^FILE TRANSFER CONTROL
			C.  ^COMMUNICATIONS CONTROL( PROTOCOL, MODE)
			D.  ^CONSOLE COMMANDS TO REMOTE SITE
			E.  ^MESSAGE PROCESSING
		4.  ^POSTMORTEM PROCESSING
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	^B.  ^LIBRARY
		1.  ^CONVERSION ROUTINES
		2.  ^STRING PROCESSING
		3.  ^LIST PROCESSING ROUTINES
			A.  ^TABLE SETUP
			B.  ^INSERT
			C.  ^DELETE
			D.  ^REPLACE
			E.  ^GET ITEM (NUMERIC, ALPHA, SEPARATOR, ETC.)
			F.  ^MATCH STRING
			G.  ^MATCH BYTE
			H.  ^TEXT MOVE
		4.  ^MEMORY POOL MANAGER
			A.  ^GET MEMORY
			B.  ^RELEASE MEMORY
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	^C.  ^OPERATING SYSTEM INTERFACE
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		1.  ^MEMORY ACQUISITION
		2.  ^HIGH PRIORITY PRINT
		3.  ^FILE PROCESSING
			A.  ^LOOKUP
			B.  ^ENTER
			C.  ^READ
			D.  ^WRITE
			E.  ^FETCH HANDLER
			F.  ^CLOSE FILE
			G.  ^RELEASE HANDLER
		4.  ^GET CURRENT DATE
		5.  ^GET CURRENT TIME
		6.  ^RETURN CONTROL TO OPERATING SYSTEM
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	^D.  ^DEVICE SUPPORT (^^DP-11, DU-11\\)
		1.  ^DEVICE INITIALIZATION
		2.  ^RING PROCESSING
		3.  ^DATA TRANSMISSION
		4.  ^DATA RECEPTION
		5.  ^TRANSMISSION INTERRUPT PROCESSING
		6.  ^RECEPTION INTERRUPT PROCESSING
		7.  ^RESPONSE TIMING AND ERROR RECOVERY
		8.  ^CHAIN TO ENCODE ON RECEIVE COMPLETE
		9.  ^RETRANSMISSION OF LOST MESSAGES
		10. ^TRAP COMMUNICATIONS DATA FOR DEBUGGING
		11. ^STATISTICS GATHERING
		12. ^CONTROLLER SHUTDOWN
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	^E.  ^INFORMATION PROCESSING (PROTOCOL HANDLING)
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		1.  ^SETTING UP COMMUNICATION PARAMETERS
		2.  ^REQUEST DEVICE INITIALIZATION
		3.  ^DECODE INFORMATION FROM DEVICE SUPPORT MODULE
		4.  ^ROUTING INFORMATION TO OPERATING SYSTEM INTERFACE
		5.  ^PROCESS INFORMATION FROM OPERATING SYSTEM 
		    INTERFACE
		6.  ^ENCODE MESSAGES FOR TRANSMISSION
		7.  ^ERROR PROCESSING AND RECOVERY
		8.  ^HANDSHAKING
		9.  ^MESSAGE TIMING AND SIZE COMPUTATION
		10. ^GATHERING STATISTICS
		11. ^TERMINATING THE COMMUNICATION PROCESS
		12. ^SENDING CONSOLE COMMAND MESSAGES
		13. ^ROUTING CONSOLE MESSAGES TO CONSOLE DEVICE
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^V.  ^FUNCTION OF LEVELS
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	^A.  ^MACRO LIBRARY
		1.  ^^LET\\ ARG = ARG <OPERATOR ARG >*
			A. ^ARG IS REGISTER, CONSTANT, ETC.
			B.  ^OPERATOR IS + - AND OR SHIFT
		2.  ^^IF\\ ARG REL DESTINATION
		3.  ^^IF\\ ARG REL ARG DESTINATION
		4.  ^^IF\\ ARG AND ARG REL DESTINATION
		5.  ^^IF\\ STATEMENTS AS ABOVE BUT WITH ^^GOTO\\
		6.  ^^DO\\ AND ^^ENDDO\\ FOR LOOPING (OPTIMIZED)
		7.  ^^SAVE\\ AND ^^RESTORE\\
		8.  ^^SWITCH\\ (INTERCHANGE VALUES OF ARGUMENTS)
		9.  ^^CALL\\ (MAY BE USED TO CALL ^^FORTRAN\\
			SUBROUTINES)
		10. ^OPTIMIZED SHIFT MACROS
		11. ^MULTIPLY BY TEN
		12. ^MACROS USE CONDITIONAL ASSEMBLY TO USE 
			ONLY INSTRUCTION SET OF THE SPECIFIC ^^PDP\\
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	^B.  ^SYSTEM INTERFACES AND DEFINITIONS
		1.  ^TRACE FLAG DEFINITION (FOR DEBUGGING)
		2.  ^DECLARE ALL GLOBAL SUBROUTINES
		3.  ^DEFINE MACROS SPECIFIC TO THIS SYSTEM
			A.  ^INSERT ^#TASK CODE
			B.  ^DELETE ^#TASK CODE
			C.  ^CHAIN ^#TASK CODE
			D.  ^SCHEDULE ^#TASK CODE, ACTIVATION TIME
			E.  ^LIST NAME, SIZE
			F.  ^TABLE ENTRY MACROS (DOUBLE, WORD , BYTE)
		4.  ^TABLE TASK SERVICE ROUTINE DEFINITIONS
			A.  ^READ
			B.  ^WRITE
			C.  ^TRANSMIT
			D.  ^WAIT
			E.  ^ENCODE
			F.  ^DECODE
		5.  ^SYSTEM CONSTANT DEFINITIONS
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	^C.  ^SITE CONFIGURATION AND IDENTIFICATION
		1.  ^DEFINE STATUS REGISTERS
		2.  ^DEFINE INTERRUPT VECTORS
		3.  ^DEFINE CONFIGURATION FLAGS (EIS)
		4.  ^ASSIGN IDENTIFICATION CODE
		5.  ^DEFINE BUFFER SIZES
		6.  ^DEFINE TRACE FUNCTIONS
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	^D.  ^INSTRUCTION CODE OF THE MODULE.  (^^A-C\\ COMMON 
		TO ALL MODULES)
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^^VI.\\  ^SYSTEM CONCEPTS
	^A.  ^TASKER
	^B.  ^SCHEDULER
	^C.  ^TASK
	^D.  ^PROCESS
	^E.  ^TASK CHAINING 
	^F.  ^CONCURRENT TASKS
	^G.  ^STATE TRANSITION
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