.MCALL	.MODULE
.MODULE	VTROOT,VERSION=05,COMMENT=<Root code for virtual VTCOM>

; Copyright (c) 1998 by Mentec, Inc., Nashua, NH.
; All rights reserved
;
; This software is furnished under a license for use only on a
; single computer system and  may  be  copied  only  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 except for  use  on  such
; system and to one who agrees to these license  terms.  Title
; to  and  ownership of the software shall at all times remain
; in Mentec, Inc.
;
; The information in this document is subject to change without
; notice and should not be construed as a commitment by Digital
; Equipment Corporation, or Mentec, Inc.
;
; Digital and Mentec  assume  no  responsibility for the use or
; reliability of its software on equipment which is not supplied
; by Digital  or Mentec,  and listed  in the  Software  Product
; Description.
	.SBTTL	EDIT HISTORY

;+
;
; Y01 (000) 18-Oct-83	Initial coding
;	MBG
;
; Y01 (001) 20-Oct-83	Added label ROOTOP for out-of-address-space fetch
;	MBG		of XL when virtual VTCOM is run from background.
;
; V01 (000) 22-Jan-84	Added dummy XM check for VTCOM
;	MBG
;
; V05 (001) 23-Jan-84	Ready for release
;
; V05 (002) 24-Jan-84	Audit information
;	MBG
;
; Y05 (003) 21-Dec-84	Added dummy SJ timer check for VTCOM
;	MBG
;
; Y05 (004) 03-Mar-85	Bummed code down to single JMP, QSET now being
;	MBG		done in virtual overlay, referencing root.
;
;-
	.SBTTL	DEFINITIONS

; RT-11 System communication area

	JSW	= 44			;Job status word
		VIRT$	= 002000 ;Virtual program bit
	.SBTTL	ABSOLUTE SECTION

	.ASECT
	. = JSW
	.WORD	VIRT$
	.SBTTL	PROGRAM START

	.GLOBL	START,	ROOTOP,	XMCHEK
	.GLOBL	SJTMCK

	.PSECT	.ROOT.

VTROOT:	JMP	START

XMCHEK:
SJTMCK:	RTS	PC

QELEM::	.BLKW	10.*10.			;Area for extra queue elements

	ROOTOP = .			;Where to fetch XL

	.END	VTROOT