;
; Ullrich von Bassewitz, 2003-04-15
;
-; unsigned char __fastcall__ ser_unload (void);
+; unsigned char ser_unload (void);
; /* Unload the currently loaded driver. */
- .import ser_clear_ptr
-
.include "ser-kernel.inc"
.include "ser-error.inc"
.include "modload.inc"
-_ser_unload:
- lda _ser_drv
- ora _ser_drv+1
- beq no_driver ; No driver
+ .import ser_clear_ptr
+ .import return0
+
- jsr ser_uninstall ; Deinstall the driver
+_ser_unload:
lda _ser_drv
- ldx _ser_drv+1
- jsr _mod_free ; Free the driver
+ pha ; Save pointer to driver
+ ora _ser_drv+1
+ beq no_driver ; No driver
+ lda _ser_drv+1
+ pha
- jmp ser_clear_ptr ; Clear the driver pointer, return zero
+ jsr _ser_uninstall ; Uninstall the driver
-no_driver:
- tax ; X = 0
- lda #SER_ERR_NO_DRIVER
- rts
+ 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