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https://github.com/wavemotion-dave/A5200DS.git
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53 lines
No EOL
1.4 KiB
C
53 lines
No EOL
1.4 KiB
C
/*
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* pia.c - PIA chip emulation
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*
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* Copyright (C) 1995-1998 David Firth
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* Copyright (C) 1998-2005 Atari800 development team (see DOC/CREDITS)
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*
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* This file is part of the Atari800 emulator project which emulates
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* the Atari 400, 800, 800XL, 130XE, and 5200 8-bit computers.
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*
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* Atari800 is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* Atari800 is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Atari800; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "config.h"
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#include "atari.h"
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#include "cpu.h"
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#include "memory.h"
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#include "pia.h"
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#include "input.h"
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UBYTE PACTL;
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UBYTE PBCTL;
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UBYTE PORTA;
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UBYTE PORTB;
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UBYTE PORT_input[2];
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UBYTE atari_os[0x800];
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void PIA_Initialise(void) {
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PACTL = 0x3f;
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PBCTL = 0x3f;
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PORTA = 0xff;
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PORTB = 0xff;
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PORT_input[0] = 0xff;
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PORT_input[1] = 0xff;
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}
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void PIA_Reset(void) {
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PORTA = 0xff;
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PORTB = 0xff;
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} |