50 lines
1.2 KiB
ArmAsm
50 lines
1.2 KiB
ArmAsm
.include "atari.inc"
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.export check_for_abort_key
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.export abort_key
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.exportzp abort_key_default = 1
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.exportzp abort_key_disable = 0
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.data
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abort_key: .byte 1
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.code
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; check whether the abort key is being pressed
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; inputs: none
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; outputs: sec if abort key pressed, clear otherwise
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check_for_abort_key:
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lda abort_key ; is "abort" enabled?
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beq nokey ; no
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lda BRKKEY
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bne nokey
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dec BRKKEY
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sec
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rts
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nokey:
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clc
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rts
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;-- LICENSE FOR atr_inputs.s --
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; The contents of this file are subject to the Mozilla Public License
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; Version 1.1 (the "License"); you may not use this file except in
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; compliance with the License. You may obtain a copy of the License at
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; http://www.mozilla.org/MPL/
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;
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; Software distributed under the License is distributed on an "AS IS"
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; basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
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; License for the specific language governing rights and limitations
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; under the License.
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;
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; The Original Code is ip65.
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;
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; The Initial Developer of the Original Code is Jonno Downes,
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; jonno@jamtronix.com.
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; Portions created by the Initial Developer are Copyright (C) 2009
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; Jonno Downes. All Rights Reserved.
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; -- LICENSE END --
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