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;THIS PROGRAM READS A FILE, SENDS THE FILE DATA OVER A NETWORK
;LINK, AND PUTS ANY DATA SENT BACK TO IT OVER THE NETWORK LINK
;INTO AN OUTPUT FILE. THIS PROGRAM IS INTENEDED TO BE USED
;WITH AN ECHOER SUCH AS "EKONET".
;THE PROGRAM IS INTERRUPT DRIVEN. THE NON-INTERRUPT PORTION
;READ THE INPUT FILE, AND WRITES THE FILE DATA TO THE
;NETWORK. THE INTERRUPT PORTION READS ANY DATA SENT TO IT
;AND PUTS THAT DATA INTO THE OUTPUT FILE. ALSO, THE TWO PROTIONS
;COOPERATE TO DETERMINE WHEN ALL OF THE DATA HAS BEEN ECHOED,
;AND THE INTERRUPT PORTION IS RESPONSIBLE FOR CLOSING THE CONNECTION.

	SEARCH MONSYM,MACSYM
	.REQUIRE SYS:MACREL
	SALL			;MAKE LISITNG NICE

;DEFINE VARIABLES AND STORAGE AREA

	P==17			;PUSH-DOWN POINTER
NPDL==10			;SIZE OF PUSH-DOWN LIST
PDL:	BLOCK NPDL		;RESERVE THE PUSH-DOWN LIST
CNTR:	BLOCK 1			;COUNT OF BYTES TO RECEIVE BEFORE EOF
SAVEAC:	BLOCK 3			;REGISTER SAVE AREA FOR PSI PORTION
LEVTAB:	PC			;PC SAVE FOR LEVEL 1
	PC			;FOR LEVEL 2 (UNUSED)
	PC			;FOR LEVEL 3 (UNUSED)

PC:	Z 0			;PC SAVE ERROR FOR PSI
CHNTAB:	1,,GOTSOM		;CHANNEL 0 INTERRUPT FOR DATA ARRIVED

;START OF PROGRAM

START:	RESET			;INITIALIZE PROCESS
	MOVE P,[IOWD NPDL,PDL]	;SET UP PUSH-DOWN LIST

;GET A JFN FOR THE INPUT FILE

	HRROI 1,[ASCIZ /
INPUT FILE NAME:/]
	PSOUT			;PROMPT FOR INPUT FILE NAME
	MOVX 1,GJ%OLD!GJ%CFM!GJ%SHT!GJ%FNS
	MOVE 2,[.PRIOU,,.PRIIN]	;GET FILE NAME FROM TTY:
	GTJFN
	 JRST [	JSERR		;OUTPUT ERROR
		JRST START]	;AND START OVER
	MOVE 14,1		;SAVE JFN FOR LATER USE
	MOVX 2,<FLD(44,OF%BSZ)+OF%RD> ;OPEN FILE FOR READ
	OPENF
	 JRST [	JSERR		;PRINT OUT ERROR
		JRST START]	;AND START OVER
	SETZB 12,CNTR		;NOT AT EOF YET
	SETZM 11		;INITIALZIE INTERRUPT COUNTER
	; ..

;GET A JFN FOR THE OUTPUT FILE

GETOUT:	HRROI 1,[ASCIZ /
OUTPUT FILE NAME:/]
	PSOUT			;PROMPT FOR OUTPUT FILE NAME
	MOVX 1,GJ%FOU!GJ%CFM!GJ%SHT!GJ%FNS
	MOVE 2,[.PRIOU,,.PRIIN]	;READ FILE NAME FROM TTY:
	GTJFN
	 JRST [	JSERR		;PRINT OUT ERROR
		JRST GETOUT]	;AND TRY AGAIN
	MOVE 13,1		;SAVE JFN FOR LATER USE
	MOVX 2,<FLD(44,OF%BSZ)+OF%WR> ;OPENF FOR WRITE
	OPENF
	 JRST [	JSERR		;PRINT OUT ERROR
		JRST GETOUT]	;AND TRY AGAIN

;GET A JFN FOR THE NETWORK LINK

GETCON:	HRROI 1,[ASCIZ /
DECnet File Specification (DCN:node-TASK-taskname.):/]
	PSOUT			;PROMPT FOR NETWORK FILE SPEC
	MOVX 1,GJ%SHT+GJ%FNS
	MOVE 2,[.PRIOU,,.PRIIN]	;GET FILE NAME FROM TTY:
	GTJFN
	 JRST [	JSERR		;PRINT ERROR
		JRST GETCON]	;AND TRY AGAIN
	MOVE 15,1		;SAVE JFN OF CONNECTION
	MOVX 2,<FLD(44,OF%BSZ)+OF%RD+OF%WR> ;OPEN FOR READ/WRITE
	OPENF
	 JRST [	JSERR		;PRINT ERROR
		JRST GETCON]	;AND TRY AGAIN

;SET UP INTERRUPTS FOR NETWORK JFN

	MOVE 1,15		;GET NETWORK JFN
	MOVEI 2,.MOACN		;FUNCTION TO SET INTERRUPT ASSIGNMENTS
	MOVX 3,<FLD(.MONCI,MO%CDN)+FLD(.MONCI,MO%INA)+FLD(0,MO%DAV)>
	MTOPR			;SET INT CHANNELS
	MOVEI 1,.FHSLF
	MOVE 2,[LEVTAB,,CHNTAB]
	SIR			;DEFINE INTERRUPT TABLES
	MOVX 2,1B0
	AIC			;TURN ON CHANNEL 0 ONLY
	EIR			;ENABLE THE SYSTEM FOR THIS PROCESS
	; ..

;NOW GET SOME FILE DATA

READ:	MOVE 1,14		;GET JFN OF INPUT FILE
	MOVE 2,[POINT 36,10000]
	MOVNI 3,1000		;READ ONE ENTIRE PAGE
	SIN			;GET NEXT PAGE
	MOVE 2,[POINT 36,10000]
	ADDI 3,1000		;COMPUTE BYTES GOTTEN
	ADDI 12,0(3)		;ACCUMULATE TOTOAL BYTES SENT OVER NETWORK
	JUMPE 3,EOF		;IF NONE READ, MUST BE AT EOF
	MOVNI 3,0(3)		;COMPUTE NEG OF BYTES TO SEND TO THE LINK
	MOVE 1,15		;GET NETWORK JFN
	SOUTR			;WRITE TO THE NETWORK
	MOVE 1,14		;GET INPUT FILE JFN AGAIN
	GTSTS			;GET STATUS
	TXNN 2,GS%EOF		;AT EOF YET?
	JRST READ		;NO. GO GET MORE FILE DATA

;AT THE EOF ON THE INPUT FILE

EOF:	MOVEM 12,CNTR		;ALL DONE
				;SAVE BYTE COUNT OF BYTES TO GET BACK
	HRROI 1,[ASCIZ /
%EOF ENCOUNTERED
/]
	PSOUT			;INFORM USER OF INPUT DONE CONDITION
	MOVE 1,14
	CLOSF			;CLOSE THE INPUT  FILE
	 JFCL
	WAIT			;AND WAIT

;DATA ARRIVED INTERRUPT HAPPENDED. READ ALL DATA

GOTSOM:	DMOVEM 1,SAVEAC		;GOT SOME DATA. SAVE REGISTERS
	MOVEM 3,SAVEAC+2	;SAVE ALL REGS
GOTSO2:	MOVE 1,15		;GET NETWORK JFN
	SIBE			;CHECK INPUT COUNT
	 JRST GOTSO1		;HAVE SOME TO READ

;NO MORE DATA BYTES TO READ THIS TIME

	SKIPN CNTR		;AT EOF ON INPUT SIDE?
	JRST GOTSO4		;NO
	CAME 11,CNTR		;YES. GOT ALL BYTES YET?
	JRST GOTSO4		;NO

;ALL BYTES HAVE BEEN ECHOED. FINISH UP

	MOVE 1,15		;YES. GET JFN
	CLOSF			;CLOSE CONNECTION
	 JFCL
	MOVE 1,13		;GET OUTPUT SIDE
	CLOSF			;CLOSE IT TOO
	 JFCL
	HALTF			;AND DONE

;NO MORE BYTES TO READ, BUT NOT ALL HAVE BEEN ECHOED YET

GOTSO4:	DMOVE 1,SAVEAC		;RESTORE NON-PSI REGISTERS
	MOVE 3,SAVEAC+2
	DEBRK			;AND GO BACK TO THE NON-PSI PORTION

;HAVE SOME BYTES TO READ FROM THE NETWORK.
;		1/ NETWORK JFN
;		2/ COUNT OF BYTES TO READ

GOTSO1:	ADDI 11,0(2)		;COUNT BYTES GOTTEN BACK
	MOVNI 3,0(2)		;GET NEGATIVE OF BYTES TO READ
	MOVE 4,3		;SAVE COUNT FOR WRITTING TO OUTPUT FILE
	MOVE 2,[POINT 36,20000]
	SIN			;GET DATA
	MOVE 2,[POINT 36,20000]
	MOVE 3,4		;GET BACK COUNT
	MOVE 1,13		;GET JFN OF OUTPUT FILE
	SOUT			;WRITE THE DATA TO THE OUTPUT FILE
	JRST GOTSO2		;AND GOT CHECK FOR MORE BYTES
	END START