emailler/drivers/a2slot.s
2015-07-08 15:46:28 +02:00

48 lines
1.0 KiB
ArmAsm

.include "zeropage.inc"
.export a2_set_slot
.import eth_driver_io_base
.code
; set Apple 2 ethernet adaptor slot
; inputs:
; A: slot number (1-7)
; outputs:
; none
a2_set_slot:
asl
asl
asl
asl
sta tmp1
lda eth_driver_io_base
and #%10001111
ora tmp1
sta eth_driver_io_base
rts
; -- LICENSE FOR a2slot.s --
; The contents of this file are subject to the Mozilla Public License
; Version 1.1 (the "License"); you may not use this file except in
; compliance with the License. You may obtain a copy of the License at
; http://www.mozilla.org/MPL/
;
; Software distributed under the License is distributed on an "AS IS"
; basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
; License for the specific language governing rights and limitations
; under the License.
;
; The Original Code is ip65.
;
; The Initial Developer of the Original Code is Jonno Downes,
; jonno@jamtronix.com.
; Portions created by the Initial Developer are Copyright (C) 2009
; Jonno Downes. All Rights Reserved.
; -- LICENSE END --