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37 lines
1000 B
ArmAsm
37 lines
1000 B
ArmAsm
;
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; Ullrich von Bassewitz, 2002-11-29
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;
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; unsigned char joy_unload (void);
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; /* Unload the currently loaded driver. */
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.include "joy-kernel.inc"
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.include "joy-error.inc"
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.include "modload.inc"
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.import joy_clear_ptr
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.import return0, return1
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_joy_unload:
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lda _joy_drv
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pha ; Save pointer to driver
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ora _joy_drv+1
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beq no_driver ; No driver
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lda _joy_drv+1
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pha
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jsr _joy_uninstall ; Uninstall the driver
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pla
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tax
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pla ; Get pointer to driver
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jsr _mod_free ; Free the driver
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jmp return0 ; Return JOY_ERR_OK
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no_driver:
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pla ; Remove pushed junk
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.assert JOY_ERR_NO_DRIVER = 1, error
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jmp return1 ; Return JOY_ERR_NO_DRIVER
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