emailler/drivers/a2_input.s
Oliver Schmidt 6680772b04 Introduced C interface to IP65.
The IP5 usage of ld65 segments and zeropage variables was made compatible with cc65 C programs already a while ago. This commit is the next logical step which is to introduce the actual C interface to IP65.

IP65 for C programs shares the the ip65.lib / ip65_tcp.lib with IP65 for assembler programs. However the various libraries from the 'drivers' are not reused. Instead there's exactly one library for every target named ip65_<target>.lib. Those libraries contain only functions used by ip65.lib / ip65_tcp.lib.

TODOs:

- Introduce c64_timer.s and atr_timer.s.
- Add a C interface to the rest of the IP65 functionality (especially TCP).
2017-11-05 14:28:49 +01:00

47 lines
1.2 KiB
ArmAsm

.export check_for_abort_key
.export abort_key
.exportzp abort_key_default = $9b
.exportzp abort_key_disable = $80
.data
abort_key: .byte $9b ; ESC
.code
; check whether the abort key is being pressed
; inputs: none
; outputs: sec if abort key pressed, clear otherwise
check_for_abort_key:
lda $c000 ; current key pressed
cmp abort_key
bne :+
bit $c010 ; clear the keyboard strobe
sec
rts
: clc
rts
; -- LICENSE FOR a2_inputc.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 --