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.SBTTL	INITIALIZATION -- PHASE 2
;
; THIS SECTION CONTAINS THE SECOND PHASE OF INITIALIZATION.
;  INITIALIZATION HAS BEEN SEPARATED INTO TWO PHASES
;  SO THAT THE FIRST PHASE CAN BE OVERLAYED BY BUFFERS.
;
.REPT 0


                          COPYRIGHT (c) 1980, 1979
            DIGITAL EQUIPMENT CORPORATION, maynard, mass.

THIS SOFTWARE IS FURNISHED UNDER A LICENSE AND MAY BE USED AND  COPIED
ONLY  IN  ACCORDANCE  WITH  THE  TERMS  OF  SUCH  LICENSE AND 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.  NO TITLE TO AND OWNERSHIP OF  THE  SOFTWARE  IS  HEREBY
TRANSFERRED.

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

DIGITAL ASSUMES NO RESPONSIBILITY FOR THE USE OR  RELIABILITY  OF  ITS
SOFTWARE ON EQUIPMENT WHICH IS NOT SUPPLIED BY DIGITAL.

.ENDR
;

;
;
;		REVISION HISTORY
;
;
; 4(001) BS	ADDED EDIT NUMBERS
;
; 4(002) BS	ADD CODE TO CREATE THE LINE ENABLE TASK FOR THE DL10 DRIVER
;
;
;
VINIT2=002
;
VEDIT=VEDIT+VINIT2
;
;

;
; HERE WHEN CHECK11 IS COMPLETE.
;
DN60:	MOV	#FIRZER,R1	;START CHUNKS AT END OF PGM
	MOV	R1,CHFST	;MAKE THIS THE FIRST CHUNK
	MOV	R1,CHLST	; AND THE LAST
	MOV	#CHSIZE/2,R2	;GET LENGTH OF A CHUNK
	MOV	R1,R0		;COPY POINTER TO CHUNK
11$:	CLR	(R1)+		;CLEAR A WORD IN THE CHUNK
	SOB	R2,11$		;CLEAR THE REST OF THE WORDS
	MOV	#1,(R0)		;MARK FIRST CHUNK AS FREE
12$:	ADD	#<CHSIZE*2>,R0	;POINT TO END OF CHUNK
	CMP	PHYLIM,R0	;ARE WE OVER THE END OF STORAGE?
	BLOS	13$		;YES, ALL DONE.
	SUB	#CHSIZE,R0	;NO, BACK UP TO START OF CHUNK
	MOV	R0,-(SP)	;SAVE CHUNK ADDRESS
	MOV	R0,CHHGH	;REMEMBER IN CASE LAST
	JSR	PC,FRECHK	;PUT THIS CHUNK ON FREE LIST
	MOV	(SP)+,R0	;RESTORE CHUNK ADDRESS
	BR	12$		;TRY TO FREE ANOTHER CHUNK
;
; HERE WHEN THE LIST OF FREE CHUNKS IS ALL BUILT.
;  BUILD THE IDLE TIME TASK, WHICH RUNS AT LOWEST PRIORITY
;  AND DOES MOST OF THE FREEING OF CHUNKS AND MESSAGES.
;
13$:	CLR	R5		;NOTE WE ARE INITIALIZING
	JSR	PC,GETTCB	;GET A TASK CONTROL BLOCK
	BCS	15$		;FAILED, THIS IS A FATAL ERROR.
	MOV	R0,TCBP3	;THIS IS THE LOWEST-PRIORITY TASK
	MOV	#IDLE,TCPC(R0)	;STORE PROGRAM COUNTER FOR TASK
	MOV	R0,TCIDLE	;STORE IN GLOBAL FOR EASY ACCESS
;

;

.IF NE, FT.D87			;CREATE THE LINE ENABLE TASK FOR DL10 4(002)

;CODE TO CREATE THE LINE ENABLE TASK FOR THE DL10 DRIVER 4(002)

	JSR	PC,GETTCB	;GET STORAGE FOR THE TCB
	BCS	15$		;FAILED, THIS IS A FATAL ERROR

	MOV	R0,TCNABL	;STORE POINTER IN GLOBAL CELL
	MOV	#DLNABL,TCPC(R0) ;STORE INITIAL PC
	BIS	#BR1, TCPS(R0)	;SET LOW PRIORITY
	MOV	TCBP3, R1	;POINT TO EXISTING LOW PR TASK
	MOV	R0, TCBP3	;PUT LINE ENABLE ON LIST
	MOV	R1, TCHAIN(R0) 	;POINT TO OTHER TASKS

;

.ENDC				;.IF NE, FT.D87 4(002)

;
; NOW BUILD THE DL10 DRIVER TASK.  THIS TASK INTERACTS WITH
;  THE PDP-10 VIA THE DL10.
;
	JSR	PC,GETTCB	;GET A TASK CONTROL BLOCK
	BCS	15$		;FAILED, FATAL ERROR.
	MOV	R0,TCBP2	;THIS IS THE ONLY MEDIUM-PRIORITY TASK
.IF DF,FT2020 ;IF ON A 2020
	MOV	#DMCTSK,TCPC(R0) ;STORE INITIAL PC FOR TASK
	BIS	#BR2,TCPS(R0)	;STORE PRIORITY LEVEL
	MOV	R0,TCDMDR	;STORE IN GLOBAL FOR EASY ACCESS
.IFF ;IF NOT ON A 2020
	MOV	#DLDRVR,TCPC(R0) ;STORE INITIAL PC FOR TASK
	BIS	#BR2,TCPS(R0)	;STORE PRIORITY LEVEL
	MOV	R0,TCDLDR	;STORE IN GLOBAL FOR EASY ACCESS
.ENDC ; END IF DF,FT2020
	CLR	TCBP1		;NO HIGH-PRIORITY TASKS AS YET
;
; NOW WAIT FOR THE PDP-10 TO COME ON LINE
;
14$:
.IF DF,FT2020 ;IF ON A 2020
	JSR	PC,MC.INI	;INITIALIZE THE DMC11
.IFF ;IF NOT ON A 2020
	JSR	PC,INITDL	;INITIALIZE THE DL10
	TST	DLGONE		;IS THE DL10 ON LINE?
	BNE	14$		;NO, WAIT FOR IT.
.ENDC ;END IF DF,FT2020
	CLR	-(SP)		;FROM PRIORITY-ZERO DISPATCHER
	MOV	#DISPATCH,-(SP) ;SET UP PSEUDO-INTERRUPT
	RTI			;DISMISS THE "INTERRUPT"
				; AND THUS BRANCH TO DISPATCHER
;
; HERE IF THERE ISN'T ENOUGH FREE STORAGE TO GET THE
;  INITIAL TCBS.  THIS IS A FATAL ERROR.
;
15$:	STOPCD	NCI		;NOT ENOUGH CORE FOR INITIALIZATION


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