;
;	File:		SCSIMgrInitDB.a
;
;	Contains:	DB Lite SCSI Manager c80 initialization routines
;
;	Written by:	James Blair
;
;	Copyright:	© 1992, 1994 by Apple Computer, Inc.  All rights reserved.
;
;   This file is used in these builds:   ROM
;
;	Change History (most recent first):
;
;	   <SM2>	 1/26/94	rab		Removed padForOverpatch stuff from the end of this file
;									(SuperMario does not use it…).
;	   <SM1>	  2/5/93	CSS		Checkin from Horror.
;		<H2>	  3/3/92	SWC		Added overpatch padding.
;		<H1>	 2/10/92	SWC		jab/Added dual SCSI bus code for DBLite to HORROR.
;

			BLANKS		ON				; assembler accepts spaces & tabs in operand field
			STRING		ASIS			; generate string as specified
			PRINT		OFF				; do not send subsequent lines to the listing file
										;	don't print includes

	IF (&TYPE('dbugSCSIDB') = 'UNDEFINED') THEN
dbugSCSIDB	EQU		0							; for debugging purposes
	ENDIF
			LOAD		'StandardEqu.d'			; from StandardEqu.a and for building ROMs
			INCLUDE		'HardwareEqu.a'			;												
			INCLUDE		'SCSI.a'				; <SM1> CSS
			INCLUDE 	'SCSIPriv.a'
			INCLUDE		'UniversalEqu.a'		; for TestFor										

			PRINT		ON				; do send subsequent lines to the listing files

SCSIInitDB	PROC	EXPORT				;

			EXPORT	InitMgr_SCSIDB

			IMPORT	SCSIMgr_DB
			IMPORT	DoSCSIReset_DB
			IMPORT	DoSCSIGet_DB
			IMPORT	DoSCSISelect_Dc80
			
			WITH	scsiGlobalRecord
			
;-------------------------------------------------------------
;
;	Initialization code for the DB Lite SCSI Manager

InitMgr_SCSIDB
			movem.l	intrRegs, -(sp)				; save all registers, for convenience
			moveq.l	#0, zeroReg					; initialize "zeroReg"
			movea.l	SCSIGlobals, a4				; get ptr to structure
			
			moveq.l	#numSelectorsDB-1, d1		; loop count 
			lea.l	SCSIMgr_DB, a1				; get start of SCSI Mgr code
			move.l	a1, d0						; remember base address
			lea		OffsetTblDB, a1				; address of offset table
			movea.l	a4, a0						; point to base of old SCSI Mgr jump table		
@MakeJmpTbl	
			moveq.l	#0, d2						; clear high word
			move.w	(a1)+, d2					; get the next offset
			add.l	d0, d2						; compute the address
			move.l	d2, (a0)+					; install it in the jump table
			dbra	d1, @MakeJmpTbl				; loop for all vectors
			
			lea.l	DoSCSISelect_Dc80, a1		; point to Dual SCSIc80 Select proc
			move.l	a1, jvSelect(a4)			; use this Select routine
	
			move.l	SCSIBase,base5380_1(a4)		; load addresses for the internal controller
			move.l	SCSIDMA,pdma5380_1(a4)		;  
			move.l	SCSIHsk,hhsk5380_1(a4)		;  
			
			clr.l	G_SCSIDevMap0(a4)			; initialize SCSI Device Map 0
			clr.l	G_SCSIDevMap1(a4)			; initialize SCSI Device Map 1

@InitDone
			movem.l	(sp)+, intrRegs				; restore registers
			rts
			
			

;-------------------------------------------------------------
;
OffsetTblDB
			DC.W	DoSCSIReset_DB-SCSIMgr_DB			;  0: SCSIReset
			DC.W	DoSCSIGet_DB-SCSIMgr_DB				;  1: SCSIGet
			DC.W	DoSCSISelect_Dc80-SCSIMgr_DB		;  2: SCSISelect										

;==========================================================================


		ENDWITH

		END