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/* ula.h: ULA routines
Copyright (c) 1999-2004 Philip Kendall, Darren Salt
$Id: ula.h 3010 2007-06-18 19:40:05Z pak21 $
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
Author contact information:
E-mail: philip-fuse@shadowmagic.org.uk
*/
#ifndef FUSE_ULA_H
#define FUSE_ULA_H
#define ULA_CONTENTION_SIZE 80000
/* How much contention do we get at every tstate when MREQ is active? */
extern libspectrum_byte ula_contention[ ULA_CONTENTION_SIZE ];
/* And how much when it is inactive */
extern libspectrum_byte ula_contention_no_mreq[ ULA_CONTENTION_SIZE ];
int ula_init( void );
libspectrum_byte ula_read( libspectrum_word port, int *attached );
void ula_write( libspectrum_word port, libspectrum_byte b );
libspectrum_byte ula_last_byte( void );
libspectrum_byte ula_tape_level( void );
void ula_contend_port_early( libspectrum_word port );
void ula_contend_port_late( libspectrum_word port );
#endif /* #ifndef FUSE_ULA_H */
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