;__________________________________________________________________________________________________
;
;	File:		NetBootEqu.a
;
;	Contains:	Network boot equates
;
;	Written by:	Patrick Dyson
;
;	Copyright © 1989-1990 by Apple Computer, Inc.  All rights reserved.
;
;	Change History (most recent first):
;
;		 <4>	 2/20/90	PWD		Fixed drive storage equate for extra field on drive queue
;									element. Conflict with local equate caused crash on XO @ drive
;									install time.
;		 <3>	12/28/89	SWC		Fixed header and set tabs to 4.
;		 <2>	12/19/89	PWD		Adding to bbs.
;	   <1.0>	10/30/89	PWD		Adding to EASE
;__________________________________________________________________________________________________

;
; These are the machine ids to ask for boot images with.
;
MacMachID			EQU		4					; Machine ID for Spin
SEMachID			EQU		5					; Machine ID for Mac SEs et all


;
; The offsets for our globals
;
dProto				EQU		0					; boot protocol id (byte)
dProtoSlot			EQU		dProto+1			; slot for proto driver
dProtoID			EQU		dProtoSlot+1		; ID for driver
dProtoDriveNum		EQU		dProtoID+1			; drive entry number
dProtoRefNum		EQU		dProtoDriveNum+1	; b. proto driver refnum (0 if closed)
dLastError			EQU		dProtoRefNum+2		; last, untranslated error
doldToExtFS			EQU		dLastError+2		; place to save external file system hook when
												; we patch in our routine to catch the mount

dQDGlobals	EQU		doldToExtFS+4				; QD globals

dMyPort				EQU		dQDGlobals+grafSize	; our grafport (0 if not open)
dEnd				EQU		dMyPort+4			; end of globals
dGlobalsSize		EQU		dEnd				; size of globals

;
; Our param block record for calling the .atBoot driver
;

returnVCB			EQU		csCode+2			; (Ptr) space for return VCB pointer
returnDrvQ			EQU		returnVCB+4			; (Ptr) ditto for drive queue element
pad					EQU		returnDrvQ+4

netBootParamsize	EQU		pad+7				; pad out to standard control block

;
; our private storage on the end of a drive queue element
;
drvStorage			EQU		dQDrvSz2+2			; the end of a drive queue element

;
; and our extfsID
;
dFSID				EQU		1					; to be tagged on our drive queue element

;
; Boot protocol driver csCodes
;
getBootBlocks		EQU		1					;
getSysVol			EQU		2					;
mountSysVol			EQU		3					;
BPgoodBye			EQU		4					;
getDriverGlobals	EQU		5					;

;
; Boot protocol driver error codes
;

dTryAgain			EQU		-1					; negative for non-fatal
dNoError			EQU		0					; zero for no error
dNeverAgain			EQU		1					; positive for fatal


;
; assorted stuff
;
controlBit			EQU		3					; Bit for control key down
controlByte			EQU		7					; Byte for control keys

; the flags byte
BOOT_ENABLE			EQU		$80					; <pd 4>bit for booting (1 = boot)
BOOT_RESERVED		EQU		$70					; <pd 4>reserved bits
BOOT_RETRIES		EQU		$0F					; <pd 4>number of seconds to skip net booting (0-15)