;*******************************************************************************
;* Module    : BSETBCLR.SUB
;* Programmer: Tony Papadimitriou <tonyp@acm.org>
;* Purpose   : General-purpose variable BSET/BCLR equivalents
;* Language  : Motorola/Freescale/NXP 68HC11 Assembly Language (aspisys.com/ASM11)
;* Status    : FREEWARE Copyright (c) 2016 by Tony Papadimitriou <tonyp@acm.org>
;* Note(s)   : Use: #Include bsetbclr.sub
;*******************************************************************************

;*******************************************************************************
; Purpose: Variable BSET/BCLR
; Input  : A = mask
;        : X = address
; Output : None

BSET                proc
                    psha

                    ora       ,x                  ;get value to update
                    bra       ?Save

;-------------------------------------------------------------------------------

BCLR                proc
                    psha

                    coma                          ;complement for ANDing
                    anda      ,x                  ;get value to update

?Save               sta       ,x

                    pula                          ;restore registers
                    rts