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38 lines
975 B
ArmAsm
38 lines
975 B
ArmAsm
;
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; Ullrich von Bassewitz, 2003-04-15
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;
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; unsigned char ser_unload (void);
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; /* Unload the currently loaded driver. */
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.include "ser-kernel.inc"
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.include "ser-error.inc"
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.include "modload.inc"
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.import ser_clear_ptr
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.import return0
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_ser_unload:
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lda _ser_drv
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pha ; Save pointer to driver
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ora _ser_drv+1
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beq no_driver ; No driver
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lda _ser_drv+1
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pha
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jsr _ser_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 SER_ERR_OK
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no_driver:
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tax ; X = 0
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pla ; Remove pushed junk
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lda #<SER_ERR_NO_DRIVER
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rts
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