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https://git.code.sf.net/p/fuse-emulator/fuse
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92 lines
2.5 KiB
C
92 lines
2.5 KiB
C
/* periph.h: code for handling peripherals
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Copyright (c) 2004 Philip Kendall
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$Id$
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This program 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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This program 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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You should have received a copy of the GNU General Public License
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along with this program; 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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Author contact information:
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E-mail: pak21-fuse@srcf.ucam.org
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Postal address: 15 Crescent Road, Wokingham, Berks, RG40 2DB, England
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*/
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#ifndef FUSE_PERIPH_H
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#define FUSE_PERIPH_H
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#include <libspectrum.h>
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/*
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* General peripheral list handling routines
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*/
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typedef libspectrum_byte (*periph_port_read_function)( libspectrum_word port,
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int *attached );
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typedef void (*periph_port_write_function)( libspectrum_word port,
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libspectrum_byte data );
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/* Information about a peripheral */
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typedef struct periph_t {
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/* This peripheral responds to all port values where
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<port> & mask == value */
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libspectrum_word mask;
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libspectrum_word value;
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periph_port_read_function read;
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periph_port_write_function write;
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} periph_t;
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int periph_register( const periph_t *peripheral );
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int periph_register_n( const periph_t *peripherals_list, size_t n );
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int periph_set_active( int id, int active );
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void periph_clear( void );
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/*
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* The actual routines to read and write a port
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*/
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libspectrum_byte readport( libspectrum_word port );
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void writeport( libspectrum_word port, libspectrum_byte b );
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/*
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* The more Fuse-specific peripheral handling routines
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*/
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/* For indicating the (optional) presence or absence of a peripheral */
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typedef enum periph_present {
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PERIPH_PRESENT_NEVER, /* Never present */
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PERIPH_PRESENT_OPTIONAL, /* Optionally present */
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PERIPH_PRESENT_ALWAYS, /* Always present */
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} periph_present;
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/* Is the Kempston interface active */
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extern int periph_kempston_active;
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/* Is the Interface II active */
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extern int periph_interface2_active;
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int periph_setup( const periph_t *peripherals_list, size_t n,
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periph_present kempston,
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periph_present interface2 );
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void periph_update( void );
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#endif /* #ifndef FUSE_PERIPH_H */
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