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https://git.code.sf.net/p/fuse-emulator/fuse
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ba77c2ab67
To avoid clashes with any similarly named system files (thanks, BogDan Vatra and Sergio Baldoví).
86 lines
2.7 KiB
C
86 lines
2.7 KiB
C
/* spectrum.h: Spectrum 48K specific routines
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Copyright (c) 1999-2016 Philip Kendall, Darren Salt
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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 along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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Author contact information:
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E-mail: philip-fuse@shadowmagic.org.uk
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*/
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#ifndef FUSE_SPECTRUM_H
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#define FUSE_SPECTRUM_H
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#include <stdlib.h>
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#include <libspectrum.h>
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#include "memory_pages.h"
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/* How many tstates have elapsed since the last interrupt? (or more
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precisely, since the ULA last pulled the /INT line to the Z80 low) */
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extern libspectrum_dword tstates;
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/* Things relating to memory */
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extern libspectrum_byte RAM[ SPECTRUM_RAM_PAGES ][0x4000];
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typedef int
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(*spectrum_port_from_ula_function)( libspectrum_word port );
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typedef libspectrum_byte
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(*spectrum_contention_delay_function)( libspectrum_dword time );
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typedef struct spectrum_raminfo {
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/* Is this port result supplied by the ULA? */
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spectrum_port_from_ula_function port_from_ula;
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/* What's the actual delay at the current tstate with MREQ active */
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spectrum_contention_delay_function contend_delay;
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/* And without MREQ */
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spectrum_contention_delay_function contend_delay_no_mreq;
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int locked; /* Is the memory configuration locked? */
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int current_page, current_rom; /* Current paged memory */
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libspectrum_byte last_byte; /* The last byte sent to the 128K port */
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libspectrum_byte last_byte2; /* The last byte sent to +3 port */
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int special; /* Is a +3 special config in use? */
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int romcs; /* Is the /ROMCS line low? */
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int valid_pages; /* Available RAM */
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} spectrum_raminfo;
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libspectrum_byte spectrum_contend_delay_none( libspectrum_dword time );
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libspectrum_byte spectrum_contend_delay_65432100( libspectrum_dword time );
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libspectrum_byte spectrum_contend_delay_76543210( libspectrum_dword time );
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libspectrum_byte spectrum_unattached_port( void );
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libspectrum_byte spectrum_unattached_port_none( void );
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/* Miscellaneous stuff */
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extern int spectrum_frame_event;
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void spectrum_register_startup( void );
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int spectrum_frame( void );
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#endif /* #ifndef FUSE_SPECTRUM_H */
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