TITLE	"Z3PWHL - Z3lib 4.0"
;================================================================
;   The Libraries, Version 4, (C) 1989 by Alpha Systems Corp.
;----------------------------------------------------------------
; Author  : Harold F. Bower
;		Derived from Z3PWHL.Z80 Ver 1.1 by Richard Conn
; Date    : 8 Mar 87
; Version : 1.2
; Module  : Z3PWHL
; Abstract: This module contains the routine PUTWHL which sets
;	the WHEEL byte to a specified value
; Revision:
;- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

;  Module Entry Points

	PUBLIC		PUTWHL

;  External References

	EXT		ENVPTR

	.Z80
	CSEG
;===============================================================
; NAME - PUTWHL
; Entry:  A - Contains the value to put in WHEEL byte
; Exit : - Nothing returned.  The value is stored
; Uses : - None
; Special Requirements: None
;===============================================================

PUTWHL:	PUSH	HL
	PUSH	DE
	PUSH	AF
	LD	HL,(ENVPTR)	;pt to environment
	LD	DE,29H		;pt to wheel byte address
	ADD	HL,DE
	LD	E,(HL)		;get address in HL
	INC	HL
	LD	D,(HL)
	POP	AF		;get wheel byte
	LD	(DE),A		;put wheel byte in A
	POP	DE		;restore regs
	POP	HL
	RET

	END