cc65/libsrc/atmos/atmos_save.s

; Stefan Haubenthal, 2012-05-06
; based on code by Twilighte
; void __fastcall__ atmos_save(const char* name, const void* start, const void* end);

        .export         _atmos_save
        .import         popax, store_filename


.proc   _atmos_save

        sei
        sta     $02ab   ; file end lo
        stx     $02ac   ; file end hi
        jsr     popax
        sta     $02a9   ; file start lo
        stx     $02aa   ; file start hi
        jsr     popax
        jsr     store_filename
        lda     #00
        sta     $02ad
        jsr     csave_bit
        cli
        rts
csave_bit:
        php
        jmp     $e92c

.endproc