.TITLE	ALCVMF - ALLOCATE VM BUFFER (FORTRAN INTERFACE)
	.SBTTL	ALCVMF - TITLE PAGE
	.PSECT	VMX$$$,RO,I
	.IDENT	/V01.01/
	.ENABL	LC
;
; ************************************************************************
;                                                                        *
; THIS PROGRAM IS PROVIDED ON AN "AS IS" BASIS ONLY.  DIGITAL  EQUIPMENT *
; COMPUTER USER'S SOCIETY,  DIGITAL EQUIPMENT CORPORATION, MONSANTO, AND *
; THE AUTHOR DISCLAIM  ALL WARRANTIES ON THE PROGRAM,  INCLUDING WITHOUT *
; LIMITATION, ALL IMPLIED WARRANTIES OF MERCHANTABLITY AND FITNESS.      *
;									 *
; FULL PERMISSION AND CONSENT IS HEREBY GIVEN TO DECUS  AND TO THE DECUS *
; SPECIAL INTEREST  GROUPS  TO  REPRODUCE,  DISTRIBUTE,  AND PUBLISH AND *
; PERMIT  OTHERS  TO  REPRODUCE  IN  WHOLE  OR  IN PART, IN ANY FORM AND *
; WITHOUT RESTRICTION, THIS PROGRAM AND ANY INFORMATION RELATING TO IT.  *
;									 *
; ************************************************************************
;
; ALLOCATE VM BUFFER (FORTRAN INTERFACE)
;
; VERSION:	V01.01
;
; AUTHOR:	R.W. STAMERJOHN	MAPC	02-NOV-81
;
; MODIFICATION HISTORY:
;
;	V01.01	RWS	02-NOV-81	INITIAL VERSION
;

	.SBTTL	ALCVMF - DECLARATIONS
	.DSABL	GBL
	.DSABL	CRF
;
; MACRO LIBRARY CALLS:
;
;	NONE.
;
; GLOBAL DECLARATIONS:
;
	.GLOBL	ALCVMF			;Module entry
;
; GLOBAL REFERENCES:
;
;	VM subroutines.
;
	.GLOBL	ALC$VM			;Allocate routine
	.GLOBL	CHK$VF			;Check for legal arguments

	.ENABL	CRF

	.SBTTL	ALCVMF * ALLOCATE VM BUFFER (FORTRAN INTERFACE)
;
;+
; This routine is a Fortran callable subroutine to allocate a virtual
; pool segment. It translates the Fortran arguments into the interface
; format and calls the allocate interface routine.
;
; INPUT:
;
;	Call by:	CALL	ALCVMF (VM_address,size)
;
;				VM_address = Allocated buffer address   (I*4)
;				size	   = Size of buffer to allocate (I*2)
;
; OUTPUT:
;
;	Double-word address of allocated space returned in "VM_address"
;	argument. Store in normal Fortran sequence (low,high).
;
;	If either argument is not specified or not exactly two arguments
;	are listed, fatal Fortran errors are declared.
;
; REGISTERS:
;
;	Uses:	R0-R5	Saves:	None	Stack:	2 words
;-
ALCVMF::				;Ref label
	CALL	CHK$VF			;Check for legal arguments
	.BYTE	2,2			; Must be only two
	MOV	(R5)+,-(SP)		;Save return address for virtual buffer
	MOV	@(R5),R3		;Get allocation size
	CALL	ALC$VM			;Call interface routine
	MOV	(SP)+,R4		;Get address to return size
	MOV	R1,(R4)+		;Return virtual address (low)
	MOV	R0,(R4)+		;Return virtual address (high)
	RETURN				;Return to caller

	.END