File: crt0.s

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cc65 2.19-2
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;
; Oliver Schmidt, 2013-05-16
;
; Startup code for cc65 (sim6502 version)
;

        .export         _exit
        .export         startup
        .export         __STARTUP__ : absolute = 1      ; Mark as startup
        .import         zerobss, callmain
        .import         initlib, donelib
        .import         exit
        .import         __MAIN_START__, __MAIN_SIZE__   ; Linker generated
        .import         __STACKSIZE__                   ; Linker generated

        .include        "zeropage.inc"

        .segment        "STARTUP"

startup:cld
        ldx     #$FF
        txs
        lda     #<(__MAIN_START__ + __MAIN_SIZE__ + __STACKSIZE__)
        ldx     #>(__MAIN_START__ + __MAIN_SIZE__ + __STACKSIZE__)
        sta     sp
        stx     sp+1
        jsr     zerobss
        jsr     initlib
        jsr     callmain
_exit:  pha
        jsr     donelib
        pla
        jmp     exit