; Environment Definition

	  IF  Z3ENV NE 0

; External ZCPR3 Environment Descriptor

	JP	START
	DEFB	'Z3ENV'		; This is a ZCPR3 Utility
	DEFB	1		; External Environment Descriptor

Z3EADR:	DEFW	Z3ENV

START:	LD	HL,(Z3EADR)	; Pt to ZCPR3 environment

	  ELSE

; Internal ZCPR3 Environment Descriptor

	MACLIB	Z3BASE.LIB
	MACLIB	SYSENV.LIB

Z3EADR:	JP	START
	SYSENV

START:	LD	HL,Z3EADR	; Pt to ZCPR3 environment
	  ENDIF		;Z3env ne 0

; Start of Program -- Initialize ZCPR3 Environment

	CALL	Z3INIT		; Initialize ZCPR3 Env and VLIB Env