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cc65/libsrc/joystick/joy_unload.s

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;
; Ullrich von Bassewitz, 2002-11-29
;
; unsigned char __fastcall__ joy_unload (void);
; /* Unload the currently loaded driver. */
.import joy_clear_ptr
.include "joy-kernel.inc"
.include "joy-error.inc"
.include "modload.inc"
_joy_unload:
lda _joy_drv
ora _joy_drv+1
beq no_driver ; No driver
jsr joy_uninstall ; Uninstall the driver
lda _joy_drv
ldx _joy_drv+1
jsr _mod_free ; Free the driver
jmp joy_clear_ptr ; Clear driver pointer, return zero
no_driver:
tax ; X = 0
lda #JOY_ERR_NO_DRIVER
rts