;
; Ullrich von Bassewitz, 2003-04-15
;
; unsigned char __fastcall__ ser_unload (void);
; /* Unload the currently loaded driver. */


        .include        "ser-kernel.inc"
        .include        "ser-error.inc"
        .include        "modload.inc"

        .import         ser_clear_ptr
        .import         return0



_ser_unload:
    	lda	_ser_drv
        pha                             ; Save pointer to driver
	ora	_ser_drv+1
       	beq    	no_driver		; No driver
	lda	_ser_drv+1
	pha

       	jsr    	_ser_uninstall		; Uninstall the driver

	pla
	tax
	pla				; Get pointer to driver
        jsr     _mod_free               ; Free the driver
        jmp     return0                 ; Return SER_ERR_OK

no_driver:
       	tax				; X = 0
        pla                             ; Remove pushed junk
	lda	#<SER_ERR_NO_DRIVER
	rts

