File: mli.s

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;
; Oliver Schmidt, 30.12.2004
;
; Apple ProDOS 8 MLI
;

        .import         __dos_type

        .include        "apple2.inc"
        .include        "mli.inc"

        .bss

mliparam:.tag   MLI

        .data

callmli:
        ; Store parameters
        sta     call
        stx     mliparam

        ; Check for ProDOS 8
        lda     __dos_type
        beq     oserr

        ; Save random counter
        lda     RNDL
        pha
        lda     RNDH
        pha

        ; Call MLI
        jsr     $BF00           ; MLI call entry point
call:   .byte   $00
        .addr   mliparam

        ; Restore random counter and return
        tax
        pla
        sta     RNDH
        pla
        sta     RNDL
        txa
        rts

        ; Load oserror code and return
oserr:  lda     #$01            ; "Bad system call number"
        sec
        rts