;*******************************************************************************
;* Module    : BSETBCLR.SUB
;* Programmer: Tony Papadimitriou <tonyp@acm.org>
;* Purpose   : General-purpose variable BSET/BCLR equivalents
;* Language  : Motorola/Freescale/NXP HC08/9S08 Assembly Language (aspisys.com/ASM8)
;* Status    : FREEWARE Copyright (c) 2016 by Tony Papadimitriou <tonyp@acm.org>
;* Original  : http://www.aspisys.com/code/hc08/bsetbclr.html
;* Note(s)   : Use: #Include bsetbclr.sub
;*******************************************************************************

#ifmain ;-----------------------------------------------------------------------
                    #ListOff
                    #Uses     mcu.inc
                    #ListOn
#endif ;------------------------------------------------------------------------
?_OBJECT_?
;*******************************************************************************
; Purpose: Variable BSET
; Input  : A = mask
;        : HX = address
; Output : None

BSET                proc
                    psha                          ;0

                    ora       ,x                  ;get value to update
                    bra       ?SaveAndExit

;*******************************************************************************
; Purpose: Variable BCLR
; Input  : A = mask
;        : HX = address
; Output : None

BCLR                proc
                    psha                          ;0

                    coma                          ;complement mask for ANDing
                    and       ,x                  ;get value to update

?SaveAndExit        sta       ,x

                    pula                          ;restore registers
                    rtc

                    #sp
;*******************************************************************************
                    #Exit
;*******************************************************************************
                    @EndStats